Create new module for flipper and update UI flipper zero

2026-01-27 14:52:06 +03:00
parent 434feb2a1d
commit dab72ac1b1
18 changed files with 2659 additions and 254 deletions
--- a/can_sniffer/src/flipper/init.py
+++ b/can_sniffer/src/flipper/init.py
@@ -0,0 +1,11 @@
+"""
+Flipper Zero Dynamic UI System.
+
+This module provides a plugin-based page system for Flipper Zero display
+with bidirectional communication via UART.
+"""
+
+from flipper.protocol import PageType, PageContent, Protocol
+from flipper.page_manager import PageManager
+
+__all__ = ["PageType", "PageContent", "Protocol", "PageManager"]
--- a/can_sniffer/src/flipper/page_manager.py
+++ b/can_sniffer/src/flipper/page_manager.py
@@ -0,0 +1,255 @@
+"""
+Page Manager for Flipper Zero UI.
+
+Manages page navigation, state, and content generation.
+"""
+
+import threading
+from typing import List, Optional, Dict, Any
+
+from flipper.protocol import Protocol, PageContent, Command, CommandType
+from flipper.pages.base import BasePage
+
+
+class PageManager:
+    """
+    Manages Flipper Zero pages and navigation.
+
+    Handles:
+    - Page registration and lifecycle
+    - Navigation between pages
+    - Command processing
+    - Content generation
+    """
+
+    def __init__(self):
+        """Initialize page manager."""
+        self._pages: List[BasePage] = []
+        self._current_index = 0
+        self._lock = threading.Lock()
+        self._last_result: Optional[str] = None
+
+    def register_page(self, page: BasePage) -> None:
+        """
+        Register a page.
+
+        Args:
+            page: Page instance to register
+        """
+        with self._lock:
+            # Check for duplicate names
+            for existing in self._pages:
+                if existing.name == page.name:
+                    raise ValueError(f"Page '{page.name}' already registered")
+
+            self._pages.append(page)
+
+    def unregister_page(self, name: str) -> bool:
+        """
+        Unregister a page by name.
+
+        Args:
+            name: Page name to remove
+
+        Returns:
+            True if page was found and removed
+        """
+        with self._lock:
+            for i, page in enumerate(self._pages):
+                if page.name == name:
+                    self._pages.pop(i)
+                    # Adjust current index if needed
+                    if self._current_index >= len(self._pages):
+                        self._current_index = max(0, len(self._pages) - 1)
+                    return True
+            return False
+
+    def get_enabled_pages(self) -> List[BasePage]:
+        """Get list of enabled pages."""
+        with self._lock:
+            return [p for p in self._pages if p.is_enabled()]
+
+    def get_page_count(self) -> int:
+        """Get number of enabled pages."""
+        return len(self.get_enabled_pages())
+
+    def get_current_page(self) -> Optional[BasePage]:
+        """Get currently active page."""
+        pages = self.get_enabled_pages()
+        with self._lock:
+            if 0 <= self._current_index < len(pages):
+                return pages[self._current_index]
+        return None
+
+    def get_current_index(self) -> int:
+        """Get current page index."""
+        with self._lock:
+            return self._current_index
+
+    def navigate_next(self) -> bool:
+        """
+        Navigate to next page.
+
+        Returns:
+            True if navigation occurred
+        """
+        pages = self.get_enabled_pages()
+
+        with self._lock:
+            # Don't navigate if current page has pending action
+            if self._current_index < len(pages):
+                current = pages[self._current_index]
+                if current.has_pending_action():
+                    return False
+
+                current.on_leave()
+
+            if self._current_index < len(pages) - 1:
+                self._current_index += 1
+                pages[self._current_index].on_enter()
+                return True
+
+        return False
+
+    def navigate_prev(self) -> bool:
+        """
+        Navigate to previous page.
+
+        Returns:
+            True if navigation occurred
+        """
+        pages = self.get_enabled_pages()
+
+        with self._lock:
+            # Don't navigate if current page has pending action
+            if self._current_index < len(pages):
+                current = pages[self._current_index]
+                if current.has_pending_action():
+                    return False
+
+                current.on_leave()
+
+            if self._current_index > 0:
+                self._current_index -= 1
+                pages[self._current_index].on_enter()
+                return True
+
+        return False
+
+    def navigate_to(self, index: int) -> bool:
+        """
+        Navigate to specific page index.
+
+        Args:
+            index: Page index to navigate to
+
+        Returns:
+            True if navigation occurred
+        """
+        pages = self.get_enabled_pages()
+
+        with self._lock:
+            if 0 <= index < len(pages):
+                if self._current_index < len(pages):
+                    pages[self._current_index].on_leave()
+
+                self._current_index = index
+                pages[self._current_index].on_enter()
+                return True
+
+        return False
+
+    def get_current_content(self) -> Optional[str]:
+        """
+        Get encoded content for current page.
+
+        Returns:
+            Protocol-encoded page content string or None
+        """
+        page = self.get_current_page()
+        if page is None:
+            return None
+
+        content = page.get_content()
+        total = self.get_page_count()
+        index = self.get_current_index()
+
+        return Protocol.encode_page(index, total, content)
+
+    def process_command(self, command: Command) -> Optional[str]:
+        """
+        Process command from Flipper Zero.
+
+        Args:
+            command: Parsed command
+
+        Returns:
+            Result message or None
+        """
+        self._last_result = None
+
+        if command.cmd_type == CommandType.NAV_NEXT:
+            self.navigate_next()
+            return None
+
+        if command.cmd_type == CommandType.NAV_PREV:
+            self.navigate_prev()
+            return None
+
+        if command.cmd_type == CommandType.SELECT:
+            page = self.get_current_page()
+            if page:
+                result = page.handle_select(command.select_index)
+                self._last_result = result
+                return result
+            return None
+
+        if command.cmd_type == CommandType.CONFIRM:
+            page = self.get_current_page()
+            if page:
+                result = page.handle_confirm()
+                self._last_result = result
+                return result
+            return None
+
+        if command.cmd_type == CommandType.CANCEL:
+            page = self.get_current_page()
+            if page:
+                result = page.handle_cancel()
+                self._last_result = result
+                return result
+            return None
+
+        if command.cmd_type == CommandType.REFRESH:
+            # Just return None, content will be sent anyway
+            return None
+
+        return None
+
+    def get_last_result(self) -> Optional[str]:
+        """Get last action result message."""
+        return self._last_result
+
+    def clear_last_result(self) -> None:
+        """Clear last result message."""
+        self._last_result = None
+
+    def get_stats(self) -> Dict[str, Any]:
+        """Get manager statistics."""
+        pages = self.get_enabled_pages()
+
+        return {
+            "total_pages": len(self._pages),
+            "enabled_pages": len(pages),
+            "current_index": self._current_index,
+            "current_page": pages[self._current_index].name if pages else None,
+            "pages": [p.name for p in pages]
+        }
+
+    def shutdown(self) -> None:
+        """Shutdown all pages."""
+        with self._lock:
+            for page in self._pages:
+                page.on_leave()
+            self._pages.clear()
+            self._current_index = 0
--- a/can_sniffer/src/flipper/pages/init.py
+++ b/can_sniffer/src/flipper/pages/init.py
@@ -0,0 +1,20 @@
+"""
+Flipper Zero Pages.
+
+Each page is a plugin that provides content for display on Flipper Zero
+and handles user actions.
+"""
+
+from flipper.pages.base import BasePage
+from flipper.pages.can_stats import CANStatsPage
+from flipper.pages.ups_status import UPSStatusPage
+from flipper.pages.system_info import SystemInfoPage
+from flipper.pages.actions import ActionsPage
+
+__all__ = [
+    "BasePage",
+    "CANStatsPage",
+    "UPSStatusPage",
+    "SystemInfoPage",
+    "ActionsPage",
+]
--- a/can_sniffer/src/flipper/pages/actions.py
+++ b/can_sniffer/src/flipper/pages/actions.py
@@ -0,0 +1,163 @@
+"""
+Actions Page.
+
+Menu page for system control actions (shutdown, reboot, etc.)
+"""
+
+from typing import Optional, Callable
+
+from flipper.pages.base import BasePage
+from flipper.protocol import PageContent, PageType
+from flipper.providers.system_provider import SystemProvider
+
+
+class ActionsPage(BasePage):
+    """
+    Page with system control actions.
+
+    Provides menu items for:
+    - Shutdown
+    - Reboot
+    - Cancel pending shutdown
+
+    Dangerous actions require confirmation before execution.
+    """
+
+    # Action identifiers
+    ACTION_SHUTDOWN = "shutdown"
+    ACTION_REBOOT = "reboot"
+    ACTION_CANCEL = "cancel_shutdown"
+
+    def __init__(self, on_result: Optional[Callable[[str], None]] = None):
+        """
+        Initialize actions page.
+
+        Args:
+            on_result: Callback when action result is available
+        """
+        super().__init__(
+            name="actions",
+            title="Actions",
+            icon="settings"
+        )
+        self._provider = SystemProvider()
+        self._on_result = on_result
+        self._confirm_mode = False
+        self._pending_action: Optional[str] = None
+
+        # Menu items: (label, action_id, requires_confirm)
+        self._menu_items = [
+            ("Shutdown", self.ACTION_SHUTDOWN, True),
+            ("Reboot", self.ACTION_REBOOT, True),
+            ("Cancel Shutdown", self.ACTION_CANCEL, False),
+        ]
+
+    def get_content(self) -> PageContent:
+        """Get page content."""
+        if self._confirm_mode and self._pending_action:
+            # Show confirmation dialog
+            action_name = self._get_action_label(self._pending_action)
+            return PageContent(
+                page_type=PageType.CONFIRM,
+                title=f"Confirm {action_name}?",
+                lines=[f"Are you sure you want to {action_name.lower()}?"],
+                actions=["Yes", "No"],
+                selected=1,  # Default to "No" for safety
+                icon=self.icon
+            )
+
+        # Normal menu mode
+        labels = [item[0] for item in self._menu_items]
+        return PageContent(
+            page_type=PageType.MENU,
+            title=self.title,
+            lines=[],
+            actions=labels,
+            selected=self._selected_index,
+            icon=self.icon
+        )
+
+    def handle_select(self, index: int) -> Optional[str]:
+        """Handle menu item selection."""
+        self._selected_index = index
+
+        if 0 <= index < len(self._menu_items):
+            label, action_id, requires_confirm = self._menu_items[index]
+
+            if requires_confirm:
+                # Enter confirmation mode
+                self._confirm_mode = True
+                self._pending_action = action_id
+                return None  # Will show confirm dialog
+            else:
+                # Execute immediately
+                return self._execute_action(action_id)
+
+        return None
+
+    def handle_confirm(self) -> Optional[str]:
+        """Execute confirmed action."""
+        if self._pending_action:
+            action_id = self._pending_action
+            self._confirm_mode = False
+            self._pending_action = None
+            return self._execute_action(action_id)
+
+        return None
+
+    def handle_cancel(self) -> Optional[str]:
+        """Cancel pending action."""
+        self._confirm_mode = False
+        self._pending_action = None
+        return "Cancelled"
+
+    def has_pending_action(self) -> bool:
+        """Check if in confirmation mode."""
+        return self._confirm_mode
+
+    def _execute_action(self, action_id: str) -> str:
+        """
+        Execute the specified action.
+
+        Args:
+            action_id: Action identifier
+
+        Returns:
+            Result message
+        """
+        result = ""
+
+        if action_id == self.ACTION_SHUTDOWN:
+            if self._provider.shutdown(delay_minutes=1):
+                result = "Shutdown in 1 min"
+            else:
+                result = "Shutdown failed"
+
+        elif action_id == self.ACTION_REBOOT:
+            if self._provider.reboot():
+                result = "Rebooting..."
+            else:
+                result = "Reboot failed"
+
+        elif action_id == self.ACTION_CANCEL:
+            if self._provider.cancel_shutdown():
+                result = "Shutdown cancelled"
+            else:
+                result = "No pending shutdown"
+
+        # Notify callback if available
+        if self._on_result:
+            self._on_result(result)
+
+        return result
+
+    def _get_action_label(self, action_id: str) -> str:
+        """Get human-readable label for action ID."""
+        for label, aid, _ in self._menu_items:
+            if aid == action_id:
+                return label
+        return action_id
+
+    def get_provider(self) -> SystemProvider:
+        """Get the System provider instance."""
+        return self._provider
--- a/can_sniffer/src/flipper/pages/base.py
+++ b/can_sniffer/src/flipper/pages/base.py
@@ -0,0 +1,260 @@
+"""
+Base Page Interface for Flipper Zero UI.
+
+All pages must inherit from BasePage and implement required methods.
+"""
+
+from abc import ABC, abstractmethod
+from typing import Optional, Dict, Any, Callable
+
+from flipper.protocol import PageContent, PageType
+
+
+class BasePage(ABC):
+    """
+    Abstract base class for Flipper Zero pages.
+
+    Each page represents a screen on Flipper Zero display.
+    Pages can be informational (read-only), interactive menus,
+    or confirmation dialogs.
+
+    Attributes:
+        name: Unique identifier for the page
+        title: Display title (shown in header)
+        icon: Icon identifier for visual representation
+        enabled: Whether the page is active
+    """
+
+    def __init__(
+        self,
+        name: str,
+        title: str,
+        icon: str = "",
+        enabled: bool = True
+    ):
+        """
+        Initialize base page.
+
+        Args:
+            name: Unique page identifier
+            title: Display title
+            icon: Icon identifier
+            enabled: Whether page is enabled
+        """
+        self.name = name
+        self.title = title
+        self.icon = icon
+        self.enabled = enabled
+        self._selected_index = 0
+        self._pending_action: Optional[str] = None
+
+    @abstractmethod
+    def get_content(self) -> PageContent:
+        """
+        Get current page content for display.
+
+        Returns:
+            PageContent object with type, title, lines, and actions
+        """
+        pass
+
+    def handle_select(self, index: int) -> Optional[str]:
+        """
+        Handle menu item selection.
+
+        Called when user presses OK on a menu item.
+
+        Args:
+            index: Selected item index
+
+        Returns:
+            Optional result message to display, or None
+        """
+        self._selected_index = index
+        return None
+
+    def handle_confirm(self) -> Optional[str]:
+        """
+        Handle confirmation action.
+
+        Called when user confirms a pending action.
+
+        Returns:
+            Optional result message, or None
+        """
+        return None
+
+    def handle_cancel(self) -> Optional[str]:
+        """
+        Handle cancel action.
+
+        Called when user cancels a pending action.
+
+        Returns:
+            Optional result message, or None
+        """
+        self._pending_action = None
+        return None
+
+    def get_selected_index(self) -> int:
+        """Get currently selected index for menu pages."""
+        return self._selected_index
+
+    def set_selected_index(self, index: int) -> None:
+        """Set selected index for menu pages."""
+        self._selected_index = index
+
+    def has_pending_action(self) -> bool:
+        """Check if there's a pending action requiring confirmation."""
+        return self._pending_action is not None
+
+    def get_pending_action(self) -> Optional[str]:
+        """Get pending action name."""
+        return self._pending_action
+
+    def is_enabled(self) -> bool:
+        """Check if page is enabled."""
+        return self.enabled
+
+    def on_enter(self) -> None:
+        """Called when user navigates to this page."""
+        pass
+
+    def on_leave(self) -> None:
+        """Called when user navigates away from this page."""
+        pass
+
+
+class InfoPage(BasePage):
+    """
+    Base class for information-only pages.
+
+    Info pages display read-only data that updates periodically.
+    They have no interactive elements.
+    """
+
+    def __init__(
+        self,
+        name: str,
+        title: str,
+        icon: str = "",
+        enabled: bool = True
+    ):
+        super().__init__(name, title, icon, enabled)
+
+    @abstractmethod
+    def get_lines(self) -> list[str]:
+        """
+        Get content lines for display.
+
+        Returns:
+            List of strings to display (max 4-5 lines)
+        """
+        pass
+
+    def get_content(self) -> PageContent:
+        """Get page content as INFO type."""
+        return PageContent(
+            page_type=PageType.INFO,
+            title=self.title,
+            lines=self.get_lines(),
+            icon=self.icon
+        )
+
+
+class MenuPage(BasePage):
+    """
+    Base class for menu pages.
+
+    Menu pages display selectable items that can trigger actions.
+    """
+
+    def __init__(
+        self,
+        name: str,
+        title: str,
+        icon: str = "",
+        enabled: bool = True
+    ):
+        super().__init__(name, title, icon, enabled)
+        self._menu_items: list[tuple[str, Callable[[], Optional[str]]]] = []
+
+    def add_item(self, label: str, action: Callable[[], Optional[str]]) -> None:
+        """
+        Add menu item.
+
+        Args:
+            label: Display label for the item
+            action: Callback function when item is selected
+        """
+        self._menu_items.append((label, action))
+
+    def clear_items(self) -> None:
+        """Clear all menu items."""
+        self._menu_items.clear()
+        self._selected_index = 0
+
+    def get_content(self) -> PageContent:
+        """Get page content as MENU type."""
+        labels = [item[0] for item in self._menu_items]
+        return PageContent(
+            page_type=PageType.MENU,
+            title=self.title,
+            lines=[],
+            actions=labels,
+            selected=self._selected_index,
+            icon=self.icon
+        )
+
+    def handle_select(self, index: int) -> Optional[str]:
+        """Execute action for selected menu item."""
+        self._selected_index = index
+
+        if 0 <= index < len(self._menu_items):
+            _, action = self._menu_items[index]
+            return action()
+
+        return None
+
+
+class ConfirmPage(BasePage):
+    """
+    Confirmation dialog page.
+
+    Used to confirm dangerous actions like shutdown or reboot.
+    """
+
+    def __init__(
+        self,
+        name: str,
+        title: str,
+        message: str,
+        on_confirm: Callable[[], Optional[str]],
+        on_cancel: Optional[Callable[[], Optional[str]]] = None,
+        icon: str = "",
+    ):
+        super().__init__(name, title, icon, enabled=True)
+        self.message = message
+        self._on_confirm = on_confirm
+        self._on_cancel = on_cancel
+
+    def get_content(self) -> PageContent:
+        """Get page content as CONFIRM type."""
+        return PageContent(
+            page_type=PageType.CONFIRM,
+            title=self.title,
+            lines=[self.message],
+            actions=["Yes", "No"],
+            selected=1,  # Default to "No" for safety
+            icon=self.icon
+        )
+
+    def handle_confirm(self) -> Optional[str]:
+        """Execute confirm action."""
+        return self._on_confirm()
+
+    def handle_cancel(self) -> Optional[str]:
+        """Execute cancel action."""
+        if self._on_cancel:
+            return self._on_cancel()
+        return None
--- a/can_sniffer/src/flipper/pages/can_stats.py
+++ b/can_sniffer/src/flipper/pages/can_stats.py
@@ -0,0 +1,66 @@
+"""
+CAN Statistics Page.
+
+Displays CAN sniffer statistics on Flipper Zero.
+"""
+
+from flipper.pages.base import InfoPage
+from flipper.providers.can_provider import CANProvider
+
+
+class CANStatsPage(InfoPage):
+    """
+    Page displaying CAN bus statistics.
+
+    Shows:
+    - Total frames received
+    - Pending/processed frames
+    - Queue status
+    - Dropped frames (if any)
+    """
+
+    def __init__(self):
+        super().__init__(
+            name="can_stats",
+            title="CAN Statistics",
+            icon="can"
+        )
+        self._provider = CANProvider()
+
+    def get_lines(self) -> list[str]:
+        """Get statistics lines for display."""
+        data = self._provider.get_data()
+
+        lines = [
+            f"Total: {self._format_number(data.total_frames)}",
+            f"Processed: {self._format_number(data.processed_frames)}",
+            f"Queue: {data.queue_size}/{data.queue_capacity}",
+        ]
+
+        # Add interface breakdown if available
+        if data.interfaces:
+            iface_str = ", ".join(
+                f"{k}: {self._format_number(v)}"
+                for k, v in data.interfaces.items()
+            )
+            if len(iface_str) <= 25:
+                lines.append(iface_str)
+
+        # Show dropped count if non-zero
+        if data.dropped_frames > 0:
+            lines.append(f"Dropped: {data.dropped_frames}")
+
+        return lines
+
+    def _format_number(self, num: int) -> str:
+        """Format large numbers with K/M suffix."""
+        if num >= 1_000_000:
+            return f"{num / 1_000_000:.1f}M"
+        elif num >= 1_000:
+            return f"{num / 1_000:.1f}K"
+        else:
+            return str(num)
+
+    def get_provider(self) -> CANProvider:
+        """Get the CAN provider instance."""
+        return self._provider
--- a/can_sniffer/src/flipper/pages/system_info.py
+++ b/can_sniffer/src/flipper/pages/system_info.py
@@ -0,0 +1,72 @@
+"""
+System Information Page.
+
+Displays Raspberry Pi system metrics on Flipper Zero.
+"""
+
+from flipper.pages.base import InfoPage
+from flipper.providers.system_provider import SystemProvider
+
+
+class SystemInfoPage(InfoPage):
+    """
+    Page displaying Raspberry Pi system metrics.
+
+    Shows:
+    - CPU temperature
+    - Power consumption
+    - Fan RPM
+    - Input voltage
+    """
+
+    def __init__(self):
+        super().__init__(
+            name="system_info",
+            title="System Info",
+            icon="cpu"
+        )
+        self._provider = SystemProvider()
+
+    def get_lines(self) -> list[str]:
+        """Get system info lines for display."""
+        data = self._provider.get_data()
+
+        lines = [
+            f"CPU Temp: {data.cpu_temp:.1f}C {self._get_temp_indicator(data.cpu_temp)}",
+            f"Power: {data.power_watts:.2f}W",
+        ]
+
+        # Fan RPM (may not be available on all systems)
+        if data.fan_rpm > 0:
+            lines.append(f"Fan: {data.fan_rpm} RPM")
+        else:
+            lines.append("Fan: N/A")
+
+        # Input voltage
+        if data.input_voltage > 0:
+            lines.append(f"Input: {data.input_voltage:.2f}V")
+
+        return lines
+
+    def _get_temp_indicator(self, temp: float) -> str:
+        """
+        Get temperature status indicator.
+
+        Args:
+            temp: Temperature in Celsius
+
+        Returns:
+            Status indicator string
+        """
+        if temp >= 80:
+            return "(!)"  # Critical
+        elif temp >= 70:
+            return "(W)"  # Warning
+        elif temp >= 60:
+            return "(~)"  # Warm
+        else:
+            return ""     # OK
+
+    def get_provider(self) -> SystemProvider:
+        """Get the System provider instance."""
+        return self._provider
--- a/can_sniffer/src/flipper/pages/ups_status.py
+++ b/can_sniffer/src/flipper/pages/ups_status.py
@@ -0,0 +1,85 @@
+"""
+UPS Status Page.
+
+Displays X120x UPS battery and power status on Flipper Zero.
+"""
+
+from flipper.pages.base import InfoPage
+from flipper.providers.ups_provider import UPSProvider
+
+
+class UPSStatusPage(InfoPage):
+    """
+    Page displaying UPS (X120x) status.
+
+    Shows:
+    - Battery percentage and voltage
+    - Charging status
+    - Power loss indicator
+    - Input voltage
+    """
+
+    def __init__(self):
+        super().__init__(
+            name="ups_status",
+            title="UPS Status",
+            icon="battery"
+        )
+        self._provider = UPSProvider()
+
+    def get_lines(self) -> list[str]:
+        """Get UPS status lines for display."""
+        if not self._provider.is_available():
+            return [
+                "UPS not available",
+                self._provider.get_last_error() or "Check I2C connection"
+            ]
+
+        data = self._provider.get_data()
+
+        # Battery bar visualization
+        battery_bar = self._get_battery_bar(data.capacity)
+
+        lines = [
+            f"Bat: {data.capacity:.1f}% {battery_bar}",
+            f"Voltage: {data.voltage:.2f}V",
+        ]
+
+        # Charging/power status
+        if data.power_loss:
+            lines.append("Power: BATTERY MODE")
+            if data.capacity < 15:
+                lines.append("WARNING: Critical!")
+            elif data.capacity < 25:
+                lines.append("WARNING: Low battery")
+        else:
+            status = "Charging" if data.is_charging else "Full"
+            lines.append(f"Status: {status}")
+            lines.append(f"Input: {data.input_voltage:.2f}V")
+
+        return lines
+
+    def _get_battery_bar(self, percent: float) -> str:
+        """
+        Create ASCII battery bar.
+
+        Args:
+            percent: Battery percentage (0-100)
+
+        Returns:
+            Battery visualization string like "[====  ]"
+        """
+        filled = int(percent / 20)  # 5 segments
+        empty = 5 - filled
+
+        bar = "[" + "=" * filled + " " * empty + "]"
+
+        return bar
+
+    def is_enabled(self) -> bool:
+        """Check if page should be shown."""
+        return self.enabled and self._provider.is_available()
+
+    def get_provider(self) -> UPSProvider:
+        """Get the UPS provider instance."""
+        return self._provider
--- a/can_sniffer/src/flipper/protocol.py
+++ b/can_sniffer/src/flipper/protocol.py
@@ -0,0 +1,194 @@
+"""
+Flipper Zero Communication Protocol.
+
+Defines message formats for RPi <-> Flipper Zero UART communication.
+
+Protocol Messages:
+    RPi -> Flipper:
+        PAGE:<idx>/<total>|<type>|<title>|<lines>|<actions>|<selected>
+        ACK:<device>,ip=<ip>
+        RESULT:<status>|<message>
+
+    Flipper -> RPi:
+        INIT:<device>
+        STOP:<device>
+        CMD:NAV:<next|prev>
+        CMD:SELECT:<index>
+        CMD:CONFIRM
+        CMD:CANCEL
+        CMD:REFRESH
+"""
+
+from dataclasses import dataclass, field
+from enum import Enum
+from typing import List, Optional
+
+
+class PageType(Enum):
+    """Types of pages for different UI layouts."""
+
+    INFO = "info"        # Read-only information display
+    MENU = "menu"        # Selectable menu items
+    CONFIRM = "confirm"  # Confirmation dialog (Yes/No)
+
+
+class CommandType(Enum):
+    """Types of commands from Flipper to RPi."""
+
+    INIT = "INIT"
+    STOP = "STOP"
+    NAV_NEXT = "NAV:next"
+    NAV_PREV = "NAV:prev"
+    SELECT = "SELECT"
+    CONFIRM = "CONFIRM"
+    CANCEL = "CANCEL"
+    REFRESH = "REFRESH"
+
+
+@dataclass
+class PageContent:
+    """
+    Content structure for a page to be displayed on Flipper Zero.
+
+    Attributes:
+        page_type: Type of page (info, menu, confirm)
+        title: Page title (max ~20 chars for display)
+        lines: Content lines to display (max 4-5 lines)
+        actions: Available actions/menu items (for menu type)
+        selected: Currently selected item index (for menu type)
+        icon: Optional icon identifier for the page
+    """
+
+    page_type: PageType
+    title: str
+    lines: List[str] = field(default_factory=list)
+    actions: List[str] = field(default_factory=list)
+    selected: int = 0
+    icon: str = ""
+
+    def __post_init__(self):
+        # Truncate title if too long
+        if len(self.title) > 20:
+            self.title = self.title[:17] + "..."
+
+
+@dataclass
+class Command:
+    """Parsed command from Flipper Zero."""
+
+    cmd_type: CommandType
+    payload: str = ""
+
+    @property
+    def select_index(self) -> int:
+        """Get selected index for SELECT command."""
+        if self.cmd_type == CommandType.SELECT:
+            try:
+                return int(self.payload)
+            except ValueError:
+                return 0
+        return 0
+
+
+class Protocol:
+    """
+    Protocol encoder/decoder for Flipper Zero communication.
+
+    Message format uses pipe (|) as field separator and semicolon (;)
+    as item separator within fields.
+    """
+
+    FIELD_SEP = "|"
+    ITEM_SEP = ";"
+
+    @staticmethod
+    def encode_page(
+        page_index: int,
+        total_pages: int,
+        content: PageContent
+    ) -> str:
+        """
+        Encode page content to protocol message.
+
+        Args:
+            page_index: Current page index (0-based)
+            total_pages: Total number of pages
+            content: Page content to encode
+
+        Returns:
+            Encoded message string with newline
+        """
+        # PAGE:<idx>/<total>|<type>|<title>|<lines>|<actions>|<selected>
+        lines_str = Protocol.ITEM_SEP.join(content.lines)
+        actions_str = Protocol.ITEM_SEP.join(content.actions)
+
+        parts = [
+            f"PAGE:{page_index}/{total_pages}",
+            content.page_type.value,
+            content.title,
+            lines_str,
+            actions_str,
+            str(content.selected)
+        ]
+
+        return Protocol.FIELD_SEP.join(parts) + "\n"
+
+    @staticmethod
+    def encode_ack(device: str, ip: str) -> str:
+        """Encode ACK message."""
+        return f"ACK:{device},ip={ip}\n"
+
+    @staticmethod
+    def encode_result(success: bool, message: str) -> str:
+        """Encode result message after action execution."""
+        status = "OK" if success else "ERROR"
+        return f"RESULT:{status}|{message}\n"
+
+    @staticmethod
+    def decode_command(line: str) -> Optional[Command]:
+        """
+        Decode command from Flipper Zero.
+
+        Args:
+            line: Raw command line (without newline)
+
+        Returns:
+            Parsed Command object or None if invalid
+        """
+        line = line.strip()
+
+        if not line:
+            return None
+
+        # INIT:<device>
+        if line.startswith("INIT:"):
+            return Command(CommandType.INIT, line[5:])
+
+        # STOP:<device>
+        if line.startswith("STOP:"):
+            return Command(CommandType.STOP, line[5:])
+
+        # CMD:NAV:next / CMD:NAV:prev
+        if line == "CMD:NAV:next":
+            return Command(CommandType.NAV_NEXT)
+
+        if line == "CMD:NAV:prev":
+            return Command(CommandType.NAV_PREV)
+
+        # CMD:SELECT:<index>
+        if line.startswith("CMD:SELECT:"):
+            return Command(CommandType.SELECT, line[11:])
+
+        # CMD:CONFIRM
+        if line == "CMD:CONFIRM":
+            return Command(CommandType.CONFIRM)
+
+        # CMD:CANCEL
+        if line == "CMD:CANCEL":
+            return Command(CommandType.CANCEL)
+
+        # CMD:REFRESH
+        if line == "CMD:REFRESH":
+            return Command(CommandType.REFRESH)
+
+        return None
--- a/can_sniffer/src/flipper/providers/init.py
+++ b/can_sniffer/src/flipper/providers/init.py
@@ -0,0 +1,18 @@
+"""
+Data Providers for Flipper Zero Pages.
+
+Providers abstract data sources (UPS, system metrics, CAN stats)
+from the pages that display them.
+"""
+
+from flipper.providers.base import BaseProvider
+from flipper.providers.ups_provider import UPSProvider
+from flipper.providers.system_provider import SystemProvider
+from flipper.providers.can_provider import CANProvider
+
+__all__ = [
+    "BaseProvider",
+    "UPSProvider",
+    "SystemProvider",
+    "CANProvider",
+]
--- a/can_sniffer/src/flipper/providers/base.py
+++ b/can_sniffer/src/flipper/providers/base.py
@@ -0,0 +1,119 @@
+"""
+Base Provider Interface.
+
+Providers are singleton data sources that pages can query.
+They handle caching and thread-safe data access.
+"""
+
+from abc import ABC, abstractmethod
+from typing import Dict, Any, Optional
+import threading
+import time
+
+
+class BaseProvider(ABC):
+    """
+    Abstract base class for data providers.
+
+    Providers:
+    - Are singletons (one instance per type)
+    - Cache data with configurable TTL
+    - Are thread-safe
+    - Handle errors gracefully
+
+    Attributes:
+        name: Provider identifier
+        cache_ttl: Cache time-to-live in seconds
+    """
+
+    _instances: Dict[str, "BaseProvider"] = {}
+    _lock = threading.Lock()
+
+    def __new__(cls, *args, **kwargs):
+        """Singleton pattern implementation."""
+        with cls._lock:
+            if cls.__name__ not in cls._instances:
+                instance = super().__new__(cls)
+                cls._instances[cls.__name__] = instance
+            return cls._instances[cls.__name__]
+
+    def __init__(self, name: str, cache_ttl: float = 1.0):
+        """
+        Initialize provider.
+
+        Args:
+            name: Provider identifier
+            cache_ttl: Cache TTL in seconds
+        """
+        # Prevent re-initialization for singleton
+        if hasattr(self, "_initialized") and self._initialized:
+            return
+
+        self.name = name
+        self.cache_ttl = cache_ttl
+        self._cache: Dict[str, Any] = {}
+        self._cache_timestamps: Dict[str, float] = {}
+        self._data_lock = threading.Lock()
+        self._initialized = True
+        self._available = True
+        self._last_error: Optional[str] = None
+
+    def _get_cached(self, key: str) -> Optional[Any]:
+        """
+        Get cached value if not expired.
+
+        Args:
+            key: Cache key
+
+        Returns:
+            Cached value or None if expired/missing
+        """
+        with self._data_lock:
+            if key not in self._cache:
+                return None
+
+            timestamp = self._cache_timestamps.get(key, 0)
+            if time.time() - timestamp > self.cache_ttl:
+                return None
+
+            return self._cache[key]
+
+    def _set_cached(self, key: str, value: Any) -> None:
+        """
+        Set cached value.
+
+        Args:
+            key: Cache key
+            value: Value to cache
+        """
+        with self._data_lock:
+            self._cache[key] = value
+            self._cache_timestamps[key] = time.time()
+
+    def _clear_cache(self) -> None:
+        """Clear all cached values."""
+        with self._data_lock:
+            self._cache.clear()
+            self._cache_timestamps.clear()
+
+    @abstractmethod
+    def refresh(self) -> bool:
+        """
+        Refresh provider data from source.
+
+        Returns:
+            True if refresh successful
+        """
+        pass
+
+    def is_available(self) -> bool:
+        """Check if provider is available."""
+        return self._available
+
+    def get_last_error(self) -> Optional[str]:
+        """Get last error message."""
+        return self._last_error
+
+    def shutdown(self) -> None:
+        """Cleanup provider resources."""
+        self._clear_cache()
--- a/can_sniffer/src/flipper/providers/can_provider.py
+++ b/can_sniffer/src/flipper/providers/can_provider.py
@@ -0,0 +1,135 @@
+"""
+CAN Statistics Provider.
+
+Provides CAN sniffer statistics from the message processor.
+"""
+
+from typing import Dict, Any, Optional, Callable
+from dataclasses import dataclass, field
+
+from flipper.providers.base import BaseProvider
+
+
+@dataclass
+class CANData:
+    """CAN statistics data."""
+
+    total_frames: int = 0
+    pending_frames: int = 0
+    processed_frames: int = 0
+    dropped_frames: int = 0
+    queue_size: int = 0
+    queue_capacity: int = 100000
+    interfaces: Dict[str, int] = field(default_factory=dict)
+
+
+class CANProvider(BaseProvider):
+    """
+    Provider for CAN sniffer statistics.
+
+    This provider is updated by the FlipperHandler when
+    CAN frames are processed.
+    """
+
+    def __init__(self):
+        super().__init__(name="can", cache_ttl=0.5)
+        self._data = CANData()
+        self._stats_callback: Optional[Callable[[], Dict[str, Any]]] = None
+
+    def set_stats_callback(self, callback: Callable[[], Dict[str, Any]]) -> None:
+        """
+        Set callback to retrieve stats from message processor.
+
+        Args:
+            callback: Function that returns stats dictionary
+        """
+        self._stats_callback = callback
+
+    def update_stats(
+        self,
+        total: int = 0,
+        pending: int = 0,
+        processed: int = 0,
+        dropped: int = 0,
+        queue_size: int = 0
+    ) -> None:
+        """
+        Update CAN statistics directly.
+
+        Args:
+            total: Total frames received
+            pending: Pending frames in queue
+            processed: Processed frames
+            dropped: Dropped frames
+            queue_size: Current queue size
+        """
+        self._data.total_frames = total
+        self._data.pending_frames = pending
+        self._data.processed_frames = processed
+        self._data.dropped_frames = dropped
+        self._data.queue_size = queue_size
+        self._set_cached("data", self._data)
+
+    def update_interface_stats(self, interface: str, count: int) -> None:
+        """
+        Update per-interface statistics.
+
+        Args:
+            interface: Interface name (e.g., "can0")
+            count: Message count for this interface
+        """
+        self._data.interfaces[interface] = count
+
+    def refresh(self) -> bool:
+        """Refresh stats from callback if available."""
+        if self._stats_callback:
+            try:
+                stats = self._stats_callback()
+                self._data.total_frames = stats.get("total_frames", 0)
+                self._data.pending_frames = stats.get("pending_frames", 0)
+                self._data.processed_frames = stats.get("processed_frames", 0)
+                self._data.dropped_frames = stats.get("dropped_count", 0)
+                self._data.queue_size = stats.get("queue_size", 0)
+                self._set_cached("data", self._data)
+                return True
+            except Exception as e:
+                self._last_error = str(e)
+                return False
+
+        return True
+
+    def get_data(self) -> CANData:
+        """Get current CAN statistics."""
+        cached = self._get_cached("data")
+        if cached is not None:
+            return cached
+
+        self.refresh()
+        return self._data
+
+    def get_total_frames(self) -> int:
+        """Get total frames received."""
+        return self.get_data().total_frames
+
+    def get_pending_frames(self) -> int:
+        """Get pending frames in queue."""
+        return self.get_data().pending_frames
+
+    def get_processed_frames(self) -> int:
+        """Get processed frames."""
+        return self.get_data().processed_frames
+
+    def get_dropped_frames(self) -> int:
+        """Get dropped frames."""
+        return self.get_data().dropped_frames
+
+    def get_queue_fill_percent(self) -> float:
+        """Get queue fill percentage."""
+        data = self.get_data()
+        if data.queue_capacity == 0:
+            return 0.0
+        return (data.queue_size / data.queue_capacity) * 100
+
+    def get_interface_count(self, interface: str) -> int:
+        """Get message count for specific interface."""
+        return self.get_data().interfaces.get(interface, 0)
--- a/can_sniffer/src/flipper/providers/system_provider.py
+++ b/can_sniffer/src/flipper/providers/system_provider.py
@@ -0,0 +1,240 @@
+"""
+System Provider for Raspberry Pi metrics and control.
+
+Provides CPU temperature, power consumption, fan RPM,
+and system control actions (shutdown, reboot).
+"""
+
+import os
+import subprocess
+from typing import Optional
+from dataclasses import dataclass
+from pathlib import Path
+
+from flipper.providers.base import BaseProvider
+
+
+@dataclass
+class SystemData:
+    """System metrics data."""
+
+    cpu_temp: float = 0.0
+    cpu_volts: float = 0.0
+    cpu_amps: float = 0.0
+    power_watts: float = 0.0
+    fan_rpm: int = 0
+    input_voltage: float = 0.0
+
+
+class SystemProvider(BaseProvider):
+    """
+    Provider for Raspberry Pi system metrics.
+
+    Uses vcgencmd for hardware metrics and sysfs for fan speed.
+    Also provides system control actions.
+    """
+
+    def __init__(self):
+        super().__init__(name="system", cache_ttl=2.0)
+        self._data = SystemData()
+
+    def _read_metric(self, args: list, strip_chars: str) -> Optional[float]:
+        """
+        Read a hardware metric using vcgencmd.
+
+        Args:
+            args: Command arguments
+            strip_chars: Characters to strip from value
+
+        Returns:
+            Float value or None on error
+        """
+        try:
+            output = subprocess.check_output(args).decode("utf-8")
+            value_str = output.split("=")[1].strip().rstrip(strip_chars)
+            return float(value_str)
+        except Exception:
+            return None
+
+    def _read_cpu_temp(self) -> float:
+        """Read CPU temperature in Celsius."""
+        result = self._read_metric(["vcgencmd", "measure_temp"], "'C")
+        return result if result is not None else 0.0
+
+    def _read_cpu_volts(self) -> float:
+        """Read CPU core voltage."""
+        result = self._read_metric(["vcgencmd", "pmic_read_adc", "VDD_CORE_V"], "V")
+        return result if result is not None else 0.0
+
+    def _read_cpu_amps(self) -> float:
+        """Read CPU core current."""
+        result = self._read_metric(["vcgencmd", "pmic_read_adc", "VDD_CORE_A"], "A")
+        return result if result is not None else 0.0
+
+    def _read_input_voltage(self) -> float:
+        """Read external 5V input voltage."""
+        result = self._read_metric(["vcgencmd", "pmic_read_adc", "EXT5V_V"], "V")
+        return result if result is not None else 0.0
+
+    def _read_power_watts(self) -> float:
+        """
+        Calculate total system power consumption.
+
+        Reads all PMIC ADC values and calculates wattage.
+        """
+        try:
+            output = subprocess.check_output(["vcgencmd", "pmic_read_adc"]).decode("utf-8")
+            lines = output.strip().split("\n")
+
+            amperages = {}
+            voltages = {}
+
+            for line in lines:
+                line = line.strip()
+                if not line:
+                    continue
+
+                parts = line.split()
+                if len(parts) < 2:
+                    continue
+
+                label = parts[0]
+                value_str = parts[-1]
+
+                if "=" not in value_str:
+                    continue
+
+                val = float(value_str.split("=")[1][:-1])
+                short_label = label[:-2]
+
+                if label.endswith("A"):
+                    amperages[short_label] = val
+                else:
+                    voltages[short_label] = val
+
+            # Calculate total wattage
+            wattage = sum(
+                amperages[key] * voltages[key]
+                for key in amperages
+                if key in voltages
+            )
+
+            return wattage
+
+        except Exception:
+            return 0.0
+
+    def _read_fan_rpm(self) -> int:
+        """
+        Read fan RPM from sysfs.
+
+        Returns:
+            Fan speed in RPM or 0 if not available
+        """
+        try:
+            sys_path = Path("/sys/devices/platform/cooling_fan")
+            fan_files = list(sys_path.rglob("fan1_input"))
+
+            if not fan_files:
+                return 0
+
+            with open(fan_files[0], "r") as f:
+                rpm = f.read().strip()
+
+            return int(rpm)
+
+        except Exception:
+            return 0
+
+    def refresh(self) -> bool:
+        """Refresh system metrics."""
+        try:
+            self._data = SystemData(
+                cpu_temp=self._read_cpu_temp(),
+                cpu_volts=self._read_cpu_volts(),
+                cpu_amps=self._read_cpu_amps(),
+                power_watts=self._read_power_watts(),
+                fan_rpm=self._read_fan_rpm(),
+                input_voltage=self._read_input_voltage()
+            )
+
+            self._set_cached("data", self._data)
+            return True
+
+        except Exception as e:
+            self._last_error = str(e)
+            return False
+
+    def get_data(self) -> SystemData:
+        """Get current system data."""
+        cached = self._get_cached("data")
+        if cached is not None:
+            return cached
+
+        self.refresh()
+        return self._data
+
+    def get_cpu_temp(self) -> float:
+        """Get CPU temperature in Celsius."""
+        return self.get_data().cpu_temp
+
+    def get_power_watts(self) -> float:
+        """Get total power consumption in Watts."""
+        return self.get_data().power_watts
+
+    def get_fan_rpm(self) -> int:
+        """Get fan speed in RPM."""
+        return self.get_data().fan_rpm
+
+    def shutdown(self, delay_minutes: int = 0) -> bool:
+        """
+        Shutdown the system.
+
+        Args:
+            delay_minutes: Delay before shutdown (0 = immediate)
+
+        Returns:
+            True if command executed
+        """
+        try:
+            if delay_minutes > 0:
+                cmd = f"sudo shutdown -P +{delay_minutes}"
+            else:
+                cmd = "sudo shutdown -P now"
+
+            subprocess.Popen(cmd, shell=True)
+            return True
+
+        except Exception as e:
+            self._last_error = str(e)
+            return False
+
+    def reboot(self) -> bool:
+        """
+        Reboot the system.
+
+        Returns:
+            True if command executed
+        """
+        try:
+            subprocess.Popen("sudo reboot", shell=True)
+            return True
+
+        except Exception as e:
+            self._last_error = str(e)
+            return False
+
+    def cancel_shutdown(self) -> bool:
+        """
+        Cancel pending shutdown.
+
+        Returns:
+            True if command executed
+        """
+        try:
+            subprocess.call("sudo shutdown -c", shell=True)
+            return True
+
+        except Exception as e:
+            self._last_error = str(e)
+            return False
--- a/can_sniffer/src/flipper/providers/ups_provider.py
+++ b/can_sniffer/src/flipper/providers/ups_provider.py
@@ -0,0 +1,228 @@
+"""
+UPS Provider for X120x UPS on Raspberry Pi.
+
+Reads battery status, voltage, and charging state via I2C (SMBus).
+Based on https://github.com/suptronics/x120x
+"""
+
+import struct
+from typing import Optional, Tuple
+from dataclasses import dataclass
+
+from flipper.providers.base import BaseProvider
+
+
+@dataclass
+class UPSData:
+    """UPS status data."""
+
+    voltage: float = 0.0
+    capacity: float = 0.0
+    is_charging: bool = False
+    power_loss: bool = False
+    input_voltage: float = 0.0
+
+
+class UPSProvider(BaseProvider):
+    """
+    Provider for X120x UPS data.
+
+    Reads from MAX17048 fuel gauge via I2C (address 0x36).
+    Also monitors power loss detection pin (GPIO 6).
+
+    Hardware requirements:
+    - X120x UPS HAT connected via I2C
+    - smbus2 library installed
+    - gpiozero for power loss detection
+    """
+
+    # I2C address for MAX17048 fuel gauge
+    I2C_ADDRESS = 0x36
+    I2C_BUS = 1
+
+    # GPIO pins
+    CHG_ONOFF_PIN = 16
+    PLD_PIN = 6  # Power Loss Detection
+
+    def __init__(self):
+        super().__init__(name="ups", cache_ttl=2.0)
+
+        self._bus = None
+        self._pld_button = None
+        self._data = UPSData()
+
+        self._init_hardware()
+
+    def _init_hardware(self) -> None:
+        """Initialize I2C and GPIO."""
+        try:
+            import smbus2
+            self._bus = smbus2.SMBus(self.I2C_BUS)
+            self._available = True
+        except ImportError:
+            self._last_error = "smbus2 not installed"
+            self._available = False
+        except Exception as e:
+            self._last_error = f"I2C init failed: {e}"
+            self._available = False
+
+        try:
+            from gpiozero import Button
+            self._pld_button = Button(self.PLD_PIN)
+        except ImportError:
+            pass  # GPIO optional
+        except Exception:
+            pass  # GPIO optional
+
+    def _read_voltage_and_capacity(self) -> Tuple[float, float]:
+        """
+        Read voltage and capacity from MAX17048.
+
+        Returns:
+            Tuple of (voltage in V, capacity in %)
+        """
+        if not self._bus:
+            return 0.0, 0.0
+
+        try:
+            # Read voltage register (0x02)
+            voltage_read = self._bus.read_word_data(self.I2C_ADDRESS, 0x02)
+            # Read capacity register (0x04)
+            capacity_read = self._bus.read_word_data(self.I2C_ADDRESS, 0x04)
+
+            # Swap bytes (little-endian to big-endian)
+            voltage_swapped = struct.unpack("<H", struct.pack(">H", voltage_read))[0]
+            capacity_swapped = struct.unpack("<H", struct.pack(">H", capacity_read))[0]
+
+            # Calculate actual values
+            voltage = voltage_swapped * 1.25 / 1000 / 16
+            capacity = capacity_swapped / 256
+
+            return voltage, capacity
+
+        except Exception as e:
+            self._last_error = f"Read error: {e}"
+            return 0.0, 0.0
+
+    def _get_power_loss_state(self) -> bool:
+        """
+        Check power loss detection pin.
+
+        Returns:
+            True if power loss detected (running on battery)
+        """
+        if self._pld_button is None:
+            return False
+
+        try:
+            # Button pressed = power OK, not pressed = power loss
+            return not self._pld_button.is_pressed
+        except Exception:
+            return False
+
+    def _read_input_voltage(self) -> float:
+        """
+        Read input voltage using vcgencmd.
+
+        Returns:
+            Input voltage in V
+        """
+        try:
+            from subprocess import check_output
+            output = check_output(["vcgencmd", "pmic_read_adc", "EXT5V_V"]).decode("utf-8")
+            value_str = output.split("=")[1].strip().rstrip("V")
+            return float(value_str)
+        except Exception:
+            return 0.0
+
+    def refresh(self) -> bool:
+        """Refresh UPS data from hardware."""
+        if not self._available:
+            return False
+
+        try:
+            voltage, capacity = self._read_voltage_and_capacity()
+            power_loss = self._get_power_loss_state()
+            input_voltage = self._read_input_voltage()
+
+            # Determine charging state (charge disabled above 90%)
+            is_charging = capacity < 90 and not power_loss
+
+            self._data = UPSData(
+                voltage=voltage,
+                capacity=capacity,
+                is_charging=is_charging,
+                power_loss=power_loss,
+                input_voltage=input_voltage
+            )
+
+            self._set_cached("data", self._data)
+            return True
+
+        except Exception as e:
+            self._last_error = str(e)
+            return False
+
+    def get_data(self) -> UPSData:
+        """
+        Get current UPS data.
+
+        Returns:
+            UPSData object with current status
+        """
+        cached = self._get_cached("data")
+        if cached is not None:
+            return cached
+
+        self.refresh()
+        return self._data
+
+    def get_voltage(self) -> float:
+        """Get battery voltage in V."""
+        return self.get_data().voltage
+
+    def get_capacity(self) -> float:
+        """Get battery capacity in %."""
+        return self.get_data().capacity
+
+    def is_charging(self) -> bool:
+        """Check if battery is charging."""
+        return self.get_data().is_charging
+
+    def has_power_loss(self) -> bool:
+        """Check if external power is lost."""
+        return self.get_data().power_loss
+
+    def get_input_voltage(self) -> float:
+        """Get input voltage in V."""
+        return self.get_data().input_voltage
+
+    def get_status_string(self) -> str:
+        """
+        Get human-readable status string.
+
+        Returns:
+            Status string like "OK", "Battery", "Charging"
+        """
+        data = self.get_data()
+
+        if data.power_loss:
+            if data.capacity < 15:
+                return "CRITICAL"
+            elif data.capacity < 25:
+                return "LOW"
+            else:
+                return "Battery"
+        elif data.is_charging:
+            return "Charging"
+        else:
+            return "OK"
+
+    def shutdown(self) -> None:
+        """Cleanup resources."""
+        super().shutdown()
+        if self._bus:
+            try:
+                self._bus.close()
+            except Exception:
+                pass
--- a/can_sniffer/src/handlers/flipper_handler.py
+++ b/can_sniffer/src/handlers/flipper_handler.py
@@ -1,15 +1,22 @@
 """
-Flipper Zero UART Handler with Handshake Protocol.
+Flipper Zero Dynamic UI Handler.

-Waits for INIT command from Flipper Zero before sending statistics.
-Supports handshake protocol for secure connection establishment.
+Provides multi-page interface with bidirectional communication via UART.
+Supports pluggable pages for CAN stats, UPS status, system info, and actions.

 Protocol:
-    1. RPI5 waits in passive mode, listening for commands
-    2. Flipper sends: INIT:flipper\n
-    3. RPI5 responds: ACK:rpi5,ip=x.x.x.x\n
-    4. RPI5 starts sending: STATS:ip=...,total=...,pending=...,processed=...\n
-    5. Flipper sends: STOP:flipper\n to disconnect
+    RPi -> Flipper:
+        PAGE:<idx>/<total>|<type>|<title>|<lines>|<actions>|<selected>
+        ACK:<device>,ip=<ip>
+        RESULT:<status>|<message>
+
+    Flipper -> RPi:
+        INIT:<device>
+        STOP:<device>
+        CMD:NAV:<next|prev>
+        CMD:SELECT:<index>
+        CMD:CONFIRM / CMD:CANCEL
+        CMD:REFRESH
 """

 import socket
@@ -22,6 +29,10 @@ from can_frame import CANFrame
 from config import config
 from logger import get_logger

+from flipper.protocol import Protocol, Command, CommandType
+from flipper.page_manager import PageManager
+from flipper.pages import CANStatsPage, UPSStatusPage, SystemInfoPage, ActionsPage
+
 logger = get_logger(__name__)


@@ -57,16 +68,14 @@ class FlipperHandler(BaseHandler):
    """
    Handler that communicates with Flipper Zero via UART.

-    Implements handshake protocol:
-    - Waits for INIT:flipper command
-    - Responds with ACK:rpi5,ip=x.x.x.x
-    - Sends STATS periodically while connected
-    - Stops on STOP:flipper command
+    Provides dynamic multi-page interface:
+    - CAN Statistics
+    - UPS Status (if available)
+    - System Information
+    - Actions Menu

-    UART Configuration:
-        - Device: /dev/ttyAMA0 (or configured device)
-        - Baud: 115200
-        - Format: 8N1
+    Implements handshake protocol for connection management
+    and bidirectional command processing.
    """

    def __init__(self, enabled: Optional[bool] = None):
@@ -83,6 +92,7 @@ class FlipperHandler(BaseHandler):

        super().__init__(name="flipper_handler", enabled=enabled)

+        # Serial configuration
        self.serial_port: Optional[Any] = None
        self.device = "/dev/ttyAMA0"
        self.baudrate = 115200
@@ -113,6 +123,39 @@ class FlipperHandler(BaseHandler):
        # IP address
        self._ip_address = "0.0.0.0"

+        # Page manager
+        self._page_manager = PageManager()
+        self._setup_pages()
+
+    def _setup_pages(self) -> None:
+        """Setup default pages."""
+        # CAN Statistics (always available)
+        can_page = CANStatsPage()
+        self._page_manager.register_page(can_page)
+
+        # Keep reference to CAN provider for stats updates
+        self._can_provider = can_page.get_provider()
+
+        # UPS Status (if available)
+        ups_page = UPSStatusPage()
+        self._page_manager.register_page(ups_page)
+
+        # System Information
+        system_page = SystemInfoPage()
+        self._page_manager.register_page(system_page)
+
+        # Actions Menu
+        actions_page = ActionsPage(on_result=self._on_action_result)
+        self._page_manager.register_page(actions_page)
+
+    def _on_action_result(self, result: str) -> None:
+        """Handle action result from actions page."""
+        self.logger.info(f"Action result: {result}")
+        # Send result to Flipper
+        if self._connected:
+            msg = Protocol.encode_result(True, result)
+            self._send_raw(msg)
+
    def initialize(self) -> bool:
        """
        Initialize UART connection.
@@ -162,13 +205,15 @@ class FlipperHandler(BaseHandler):
        )
        self._rx_thread.start()

-        # Start TX thread (sends stats when connected)
+        # Start TX thread (sends page content when connected)
        self._tx_thread = threading.Thread(
            target=self._tx_loop, name="FlipperTX", daemon=True
        )
        self._tx_thread.start()

-        self.logger.info("Flipper handler started, waiting for connection...")
+        self.logger.info(
+            f"Flipper handler started with {self._page_manager.get_page_count()} pages"
+        )

    def _rx_loop(self) -> None:
        """Receive loop - listens for commands from Flipper."""
@@ -198,41 +243,61 @@ class FlipperHandler(BaseHandler):
                self.logger.debug(f"RX error: {e}")
                time.sleep(0.1)

-    def _process_command(self, command: str) -> None:
+    def _process_command(self, raw_command: str) -> None:
        """
        Process received command from Flipper.

        Args:
-            command: Received command string
+            raw_command: Raw command string
        """
-        self.logger.info(f"Received command: {command}")
+        self.logger.debug(f"RX: {raw_command}")

-        if command.startswith("INIT:"):
-            # Handshake initiation
-            client_id = command[5:].strip()
+        # Handle handshake commands directly
+        if raw_command.startswith("INIT:"):
+            client_id = raw_command[5:].strip()
            self.logger.info(f"Handshake request from: {client_id}")

-            # Send ACK with IP address
+            # Update IP and send ACK
            self._ip_address = get_ip_address()
-            ack_msg = f"ACK:rpi5,ip={self._ip_address}\n"
+            ack_msg = Protocol.encode_ack("rpi5", self._ip_address)
            self._send_raw(ack_msg)

            self._connected = True
            self.logger.info(f"Connected to Flipper, IP: {self._ip_address}")

-        elif command.startswith("STOP:"):
-            # Disconnect request
-            client_id = command[5:].strip()
+            # Send initial page content
+            self._send_page_content()
+            return
+
+        if raw_command.startswith("STOP:"):
+            client_id = raw_command[5:].strip()
            self.logger.info(f"Disconnect request from: {client_id}")
            self._connected = False
-            self.logger.info("Disconnected from Flipper")
+            return
+
+        # Parse and process other commands
+        command = Protocol.decode_command(raw_command)
+        if command is None:
+            self.logger.debug(f"Unknown command: {raw_command}")
+            return
+
+        # Process command via page manager
+        result = self._page_manager.process_command(command)
+
+        # Send result if available
+        if result:
+            msg = Protocol.encode_result(True, result)
+            self._send_raw(msg)
+
+        # Always send updated page content after command
+        self._send_page_content()

    def _tx_loop(self) -> None:
-        """Transmit loop - sends stats when connected."""
+        """Transmit loop - sends page content periodically when connected."""
        while self._running:
            try:
                if self._connected:
-                    self._send_stats()
+                    self._send_page_content()

                time.sleep(self.send_interval)

@@ -263,21 +328,16 @@ class FlipperHandler(BaseHandler):
            self.logger.debug(f"Send error: {e}")
            return False

-    def _send_stats(self) -> None:
-        """Send current statistics to Flipper Zero."""
+    def _send_page_content(self) -> None:
+        """Send current page content to Flipper Zero."""
        if not self._connected:
            return

-        with self._stats_lock:
-            total = self._total_frames
-            pending = self._pending_frames
-            processed = self._processed_frames
-
-        message = f"STATS:ip={self._ip_address},total={total},pending={pending},processed={processed}\n"
-
-        if self._send_raw(message):
-            with self._stats_lock:
-                self._sent_count += 1
+        content = self._page_manager.get_current_content()
+        if content:
+            if self._send_raw(content):
+                with self._stats_lock:
+                    self._sent_count += 1

    def handle(self, frame: CANFrame) -> bool:
        """
@@ -292,6 +352,14 @@ class FlipperHandler(BaseHandler):
        with self._stats_lock:
            self._total_frames += 1
            self._pending_frames += 1
+
+        # Update CAN provider
+        self._can_provider.update_stats(
+            total=self._total_frames,
+            pending=self._pending_frames,
+            processed=self._processed_frames
+        )
+
        return True

    def handle_batch(self, frames: List[CANFrame]) -> int:
@@ -305,10 +373,19 @@ class FlipperHandler(BaseHandler):
            Number of frames processed
        """
        count = len(frames)
+
        with self._stats_lock:
            self._total_frames += count
            self._processed_frames += count
            self._pending_frames = max(0, self._pending_frames - count)
+
+        # Update CAN provider
+        self._can_provider.update_stats(
+            total=self._total_frames,
+            pending=self._pending_frames,
+            processed=self._processed_frames
+        )
+
        return count

    def update_pending(self, pending_count: int) -> None:
@@ -321,11 +398,17 @@ class FlipperHandler(BaseHandler):
        with self._stats_lock:
            self._pending_frames = pending_count

+        self._can_provider.update_stats(
+            total=self._total_frames,
+            pending=self._pending_frames,
+            processed=self._processed_frames
+        )
+
    def flush(self) -> None:
-        """Flush - send immediate stats if connected."""
+        """Flush - send immediate page content if connected."""
        if self._connected:
            try:
-                self._send_stats()
+                self._send_page_content()
            except Exception as e:
                self.logger.debug(f"Flush error: {e}")

@@ -350,6 +433,9 @@ class FlipperHandler(BaseHandler):
            except Exception as e:
                self.logger.debug(f"Error closing serial port: {e}")

+        # Shutdown page manager
+        self._page_manager.shutdown()
+
        self._initialized = False
        self.logger.info("Flipper handler stopped")

@@ -361,7 +447,7 @@ class FlipperHandler(BaseHandler):
            Dictionary with handler stats
        """
        with self._stats_lock:
-            return {
+            stats = {
                "total_frames": self._total_frames,
                "pending_frames": self._pending_frames,
                "processed_frames": self._processed_frames,
@@ -373,6 +459,15 @@ class FlipperHandler(BaseHandler):
                "ip_address": self._ip_address,
            }

+        # Add page manager stats
+        stats.update(self._page_manager.get_stats())
+
+        return stats
+
    def is_connected(self) -> bool:
        """Check if Flipper is connected."""
        return self._connected
+
+    def get_page_manager(self) -> PageManager:
+        """Get page manager for external page registration."""
+        return self._page_manager
--- a/flip_monitor/README.md
+++ b/flip_monitor/README.md
@@ -1,27 +1,104 @@
 # CAN Monitor for Flipper Zero

-Flipper Zero application for monitoring CAN sniffer statistics from Raspberry Pi 5 via UART.
+Dynamic multi-page monitor application for Raspberry Pi 5 via UART.

 ## Features

- Real-time display of CAN sniffer statistics
- Shows: IP address, total frames, pending frames, processed frames
- Connection status indicator
- Compatible with Unleashed firmware (0.84e and later)
+- **Dynamic Page System** - Pages are fully controlled by RPi5
+- **Multiple Page Types**:
+  - **Info** - Read-only status display
+  - **Menu** - Selectable action items
+  - **Confirm** - Yes/No confirmation dialogs
+- **Real-time Updates** - Content refreshes every second
+- **Bidirectional Communication** - Send commands back to RPi5
+- **Result Notifications** - Action results displayed as overlay
+
+## Default Pages
+
+When connected to the CAN Sniffer system:
+
+| Page | Type | Description |
+|------|------|-------------|
+| CAN Statistics | Info | Frame counts, queue status, per-interface stats |
+| UPS Status | Info | Battery level, voltage, charging state (X120x) |
+| System Info | Info | CPU temperature, power consumption, fan RPM |
+| Actions | Menu | Shutdown, Reboot, Cancel shutdown |
+
+## Screen Layout
+
+```
+128x64 pixels (Flipper Zero display)
+
+----------------------------------+
+| [1/4] Page Title            (*)  |  <- Header: page indicator, title, connection dot
+----------------------------------+
+|                                  |
+| Content Line 1                   |  <- Content area: 4-5 lines
+| Content Line 2                   |
+| Content Line 3                   |
+| Content Line 4                   |
+|                                  |
+----------------------------------+
+| <          Hint Text          >  |  <- Footer: nav arrows, action hint
+----------------------------------+
+```
+
+## Controls
+
+| Key | Info Page | Menu Page | Confirm Page |
+|-----|-----------|-----------|--------------|
+| **Left/Right** | Navigate pages | Navigate pages | Navigate pages |
+| **Up/Down** | - | Select item | Switch Yes/No |
+| **OK** | - | Execute action | Confirm selection |
+| **Back** | Disconnect (pg 0) / Prev page | Same | Cancel dialog |
+
+## Protocol
+
+### RPi5 -> Flipper
+
+```
+PAGE:<idx>/<total>|<type>|<title>|<lines>|<actions>|<selected>
+ACK:<device>,ip=<ip>
+RESULT:<OK|ERROR>|<message>
+```
+
+**Examples:**
+```
+PAGE:0/4|info|CAN Statistics|Total: 12.3K;Processed: 12.1K;Queue: 142||0
+PAGE:1/4|info|UPS Status|Bat: 85.2% [====];Voltage: 4.12V;Status: Charging||0
+PAGE:2/4|info|System Info|CPU Temp: 52.1C;Power: 4.2W;Fan: 3200 RPM||0
+PAGE:3/4|menu|Actions|Shutdown;Reboot;Cancel Shutdown||0
+PAGE:3/4|confirm|Confirm Shutdown?|Are you sure?|Yes;No|1
+ACK:rpi5,ip=192.168.1.100
+RESULT:OK|Shutdown in 1 min
+```
+
+### Flipper -> RPi5
+
+```
+INIT:flipper          - Start handshake
+STOP:flipper          - Disconnect
+CMD:NAV:next          - Next page
+CMD:NAV:prev          - Previous page
+CMD:SELECT:<index>    - Select menu item
+CMD:CONFIRM           - Confirm action
+CMD:CANCEL            - Cancel action
+CMD:REFRESH           - Request page update
+```

 ## Hardware Connection

-### Wiring (RPI5 <-> Flipper Zero)
+### Wiring Diagram

 ```
-RPI5 GPIO        Flipper Zero GPIO
-----------      -----------------
-TX (GPIO 14) --> RX (Pin 14)
-RX (GPIO 15) <-- TX (Pin 13)
-GND          --> GND
+Flipper Zero            Raspberry Pi 5
+-----------             ---------------
+Pin 13 (TX)    ---->    GPIO 15 (RX) - Pin 10
+Pin 14 (RX)    <----    GPIO 14 (TX) - Pin 8
+Pin 8/11/18 (GND) ----  GND - Pin 6
 ```

-**Note:** Cross TX/RX connections (RPI TX -> Flipper RX, RPI RX -> Flipper TX)
+**Note:** Cross TX/RX connections (Flipper TX -> RPi RX)

 ### Flipper Zero GPIO Pinout

@@ -54,12 +131,6 @@ cd unleashed-firmware
 cp -r /path/to/carpibord/flip_monitor applications_user/can_monitor
 ```

-3. Create icon (10x10 PNG, 1-bit):
-```bash
-# Create icons/can_monitor.png (10x10 pixels, black & white)
-# You can use any image editor or online tool
-```
-
 ### Build

 ```bash
@@ -83,23 +154,29 @@ SD Card/apps/GPIO/can_monitor.fap

 ### 1. Enable UART

-Add to `/boot/config.txt`:
+Add to `/boot/firmware/config.txt`:
 ```
 enable_uart=1
 dtoverlay=uart0
 ```

+Disable serial console:
+```bash
+sudo raspi-config
+# Interface Options -> Serial Port -> No (login shell) -> Yes (hardware)
+```
+
 Reboot after changes.

-### 2. Install pyserial
+### 2. Install Dependencies

 ```bash
-pip install pyserial
+pip install pyserial smbus2 gpiozero
 ```

 ### 3. Configure CAN Sniffer

-Add to `can_sniffer/config.json`:
+Add to `can_sniffer/src/config.json`:
 ```json
 {
  "flipper": {
@@ -124,19 +201,38 @@ cd can_sniffer/src
 python main.py
 ```

-## Protocol
+## Adding Custom Pages

-The RPI5 sends text-based statistics over UART:
+On RPi5 side, create a new page class:

-```
-STATS:ip=192.168.1.100,total=12345,pending=100,processed=12245\n
+```python
+from flipper.pages.base import InfoPage
+
+class MyCustomPage(InfoPage):
+    def __init__(self):
+        super().__init__(
+            name="my_page",
+            title="My Page",
+            icon="custom"
+        )
+
+    def get_lines(self) -> list[str]:
+        return [
+            "Custom line 1",
+            "Custom line 2",
+            f"Value: {self.get_value()}"
+        ]
 ```

-Fields:
- `ip` - RPI5 IP address
- `total` - Total CAN frames received
- `pending` - Frames in processing queue
- `processed` - Successfully processed frames
+Register in FlipperHandler:
+
+```python
+# In flipper_handler.py
+from flipper.pages.my_custom import MyCustomPage
+
+# In _setup_pages():
+self._page_manager.register_page(MyCustomPage())
+```

 ## Troubleshooting

@@ -148,7 +244,7 @@ Fields:
 4. Test UART manually:
 ```bash
 # On RPI5
-echo "STATS:ip=test,total=1,pending=0,processed=1" > /dev/ttyAMA0
+echo "ACK:rpi5,ip=test" > /dev/ttyAMA0
 ```

 ### Permission denied on /dev/ttyAMA0
@@ -159,11 +255,23 @@ sudo usermod -a -G dialout $USER
 # Then logout and login again
 ```

-### Flipper shows "Waiting..."
+### Flipper shows "Waiting for data..."

- Stats are sent every 1 second (configurable)
+- Data is sent every 1 second (configurable)
 - Connection timeout is 5 seconds
 - Check if CAN sniffer is running
+- Check UART logs: `CAN_SNIFFER_LOGGING__LEVEL=DEBUG python main.py`
+
+### UPS page shows "not available"
+
+- X120x UPS must be connected via I2C
+- Install smbus2: `pip install smbus2`
+- Check I2C: `i2cdetect -y 1` (should show device at 0x36)
+
+## Version History
+
+- **v2.0** - Dynamic page system, bidirectional commands, UPS/System pages
+- **v1.0** - Basic CAN statistics display

 ## License

--- a/flip_monitor/application.fam
+++ b/flip_monitor/application.fam
@@ -3,9 +3,10 @@ App(
    name="CAN Monitor",
    apptype=FlipperAppType.EXTERNAL,
    entry_point="can_monitor_app",
-    stack_size=2 * 1024,
+    stack_size=4 * 1024,
    fap_category="GPIO",
    fap_author="carpibord",
-    fap_version="1.0",
-    fap_description="CAN Sniffer monitor via UART from RPI5",
+    fap_version="2.0",
+    fap_description="Dynamic multi-page RPI5 monitor with CAN stats, UPS, system info and actions",
+    fap_icon="A:/icons/gpio_50.png",
 )
--- a/flip_monitor/can_monitor.c
+++ b/flip_monitor/can_monitor.c
@@ -1,14 +1,21 @@
 /**
- * CAN Monitor for Flipper Zero
+ * CAN Monitor for Flipper Zero - Dynamic UI Version
 *
- * Multi-page application with handshake protocol.
+ * Multi-page application with dynamic content from RPI5.
 *
- * Handshake:
- *   1. User presses OK on welcome screen
- *   2. Flipper sends: INIT:flipper\n
- *   3. RPI5 responds: ACK:rpi5,ip=x.x.x.x\n
- *   4. Flipper allows navigation to stats page
- *   5. RPI5 starts sending: STATS:ip=...,total=...,pending=...,processed=...\n
+ * Protocol:
+ *   RPi -> Flipper:
+ *     PAGE:<idx>/<total>|<type>|<title>|<lines>|<actions>|<selected>
+ *     ACK:<device>,ip=<ip>
+ *     RESULT:<status>|<message>
+ *
+ *   Flipper -> RPi:
+ *     INIT:flipper
+ *     STOP:flipper
+ *     CMD:NAV:next / CMD:NAV:prev
+ *     CMD:SELECT:<index>
+ *     CMD:CONFIRM / CMD:CANCEL
+ *     CMD:REFRESH
 *
 * Wiring:
 *   RPI5 TX (GPIO14, Pin 8)  -> Flipper RX (Pin 14)
@@ -20,6 +27,7 @@
 #include <furi_hal.h>
 #include <gui/gui.h>
 #include <gui/view_port.h>
+#include <gui/elements.h>
 #include <expansion/expansion.h>

 #include <stdlib.h>
@@ -27,8 +35,11 @@

 #define TAG "CANMonitor"
 #define UART_BAUD 115200
-#define RX_BUFFER_SIZE 256
-#define IP_BUFFER_SIZE 32
+#define RX_BUFFER_SIZE 512
+#define MAX_LINES 5
+#define MAX_ACTIONS 4
+#define MAX_LINE_LENGTH 32
+#define MAX_TITLE_LENGTH 24

 // Connection state
 typedef enum {
@@ -37,21 +48,35 @@ typedef enum {
    StateConnected,
 } ConnectionState;

-// Pages
+// Page types
 typedef enum {
-    PageWelcome,
-    PageStats,
-} AppPage;
+    PageTypeInfo,
+    PageTypeMenu,
+    PageTypeConfirm,
+} PageType;

-// Statistics
+// Page content received from RPi
 typedef struct {
-    char ip_address[IP_BUFFER_SIZE];
-    uint32_t total_frames;
-    uint32_t pending_frames;
-    uint32_t processed_frames;
-    bool data_received;
+    uint8_t page_index;
+    uint8_t total_pages;
+    PageType page_type;
+    char title[MAX_TITLE_LENGTH];
+    char lines[MAX_LINES][MAX_LINE_LENGTH];
+    uint8_t line_count;
+    char actions[MAX_ACTIONS][MAX_LINE_LENGTH];
+    uint8_t action_count;
+    uint8_t selected_index;
+    bool data_valid;
    uint32_t last_update_tick;
-} CanStats;
+} PageContent;
+
+// Result message
+typedef struct {
+    bool has_result;
+    bool success;
+    char message[MAX_LINE_LENGTH];
+    uint32_t show_until_tick;
+} ResultMessage;

 // App context
 typedef struct {
@@ -63,13 +88,19 @@ typedef struct {
    FuriStreamBuffer* rx_stream;
    FuriThread* worker_thread;

-    CanStats stats;
-    AppPage current_page;
+    PageContent page;
+    ResultMessage result;
    ConnectionState conn_state;
+    char ip_address[32];
+
    volatile bool running;
    volatile bool send_init;
 } CanMonitorApp;

+// Forward declarations
+static void draw_callback(Canvas* canvas, void* ctx);
+static void input_callback(InputEvent* event, void* ctx);
+
 // Send data via UART
 static void uart_send(CanMonitorApp* app, const char* data) {
    if(app->serial) {
@@ -78,77 +109,200 @@ static void uart_send(CanMonitorApp* app, const char* data) {
    }
 }

-// Parse ACK response: ACK:rpi5,ip=x.x.x.x
-static bool parse_ack(const char* line, CanStats* stats) {
+// Clear page content
+static void clear_page_content(PageContent* page) {
+    page->page_index = 0;
+    page->total_pages = 0;
+    page->page_type = PageTypeInfo;
+    page->title[0] = '\0';
+    page->line_count = 0;
+    page->action_count = 0;
+    page->selected_index = 0;
+    page->data_valid = false;
+
+    for(int i = 0; i < MAX_LINES; i++) {
+        page->lines[i][0] = '\0';
+    }
+    for(int i = 0; i < MAX_ACTIONS; i++) {
+        page->actions[i][0] = '\0';
+    }
+}
+
+// Parse semicolon-separated items into array
+static uint8_t parse_items(const char* str, char items[][MAX_LINE_LENGTH], uint8_t max_items) {
+    uint8_t count = 0;
+
+    if(!str || str[0] == '\0') {
+        return 0;
+    }
+
+    const char* start = str;
+    const char* end;
+
+    while(count < max_items && start && *start) {
+        end = strchr(start, ';');
+
+        size_t len;
+        if(end) {
+            len = end - start;
+        } else {
+            len = strlen(start);
+        }
+
+        if(len >= MAX_LINE_LENGTH) {
+            len = MAX_LINE_LENGTH - 1;
+        }
+
+        if(len > 0) {
+            memcpy(items[count], start, len);
+            items[count][len] = '\0';
+            count++;
+        }
+
+        if(end) {
+            start = end + 1;
+        } else {
+            break;
+        }
+    }
+
+    return count;
+}
+
+// Parse PAGE message
+// Format: PAGE:<idx>/<total>|<type>|<title>|<lines>|<actions>|<selected>
+static bool parse_page(const char* line, PageContent* page) {
+    if(strncmp(line, "PAGE:", 5) != 0) {
+        return false;
+    }
+
+    const char* p = line + 5;
+    char* end;
+
+    // Parse page index and total
+    page->page_index = (uint8_t)strtoul(p, &end, 10);
+    if(*end != '/') return false;
+    p = end + 1;
+
+    page->total_pages = (uint8_t)strtoul(p, &end, 10);
+    if(*end != '|') return false;
+    p = end + 1;
+
+    // Parse page type
+    const char* type_end = strchr(p, '|');
+    if(!type_end) return false;
+
+    if(strncmp(p, "info", type_end - p) == 0) {
+        page->page_type = PageTypeInfo;
+    } else if(strncmp(p, "menu", type_end - p) == 0) {
+        page->page_type = PageTypeMenu;
+    } else if(strncmp(p, "confirm", type_end - p) == 0) {
+        page->page_type = PageTypeConfirm;
+    } else {
+        page->page_type = PageTypeInfo;
+    }
+    p = type_end + 1;
+
+    // Parse title
+    const char* title_end = strchr(p, '|');
+    if(!title_end) return false;
+
+    size_t title_len = title_end - p;
+    if(title_len >= MAX_TITLE_LENGTH) {
+        title_len = MAX_TITLE_LENGTH - 1;
+    }
+    memcpy(page->title, p, title_len);
+    page->title[title_len] = '\0';
+    p = title_end + 1;
+
+    // Parse lines
+    const char* lines_end = strchr(p, '|');
+    if(!lines_end) return false;
+
+    char lines_buf[256];
+    size_t lines_len = lines_end - p;
+    if(lines_len >= sizeof(lines_buf)) {
+        lines_len = sizeof(lines_buf) - 1;
+    }
+    memcpy(lines_buf, p, lines_len);
+    lines_buf[lines_len] = '\0';
+    page->line_count = parse_items(lines_buf, page->lines, MAX_LINES);
+    p = lines_end + 1;
+
+    // Parse actions
+    const char* actions_end = strchr(p, '|');
+    if(!actions_end) return false;
+
+    char actions_buf[128];
+    size_t actions_len = actions_end - p;
+    if(actions_len >= sizeof(actions_buf)) {
+        actions_len = sizeof(actions_buf) - 1;
+    }
+    memcpy(actions_buf, p, actions_len);
+    actions_buf[actions_len] = '\0';
+    page->action_count = parse_items(actions_buf, page->actions, MAX_ACTIONS);
+    p = actions_end + 1;
+
+    // Parse selected index
+    page->selected_index = (uint8_t)strtoul(p, NULL, 10);
+
+    page->data_valid = true;
+    page->last_update_tick = furi_get_tick();
+
+    return true;
+}
+
+// Parse ACK message
+static bool parse_ack(const char* line, char* ip_out, size_t ip_size) {
    if(strncmp(line, "ACK:", 4) != 0) {
        return false;
    }

-    const char* p = line + 4;
-
-    // Check for rpi5 identifier
-    if(strncmp(p, "rpi5", 4) != 0) {
-        return false;
-    }
-
-    // Parse ip=
-    const char* ip = strstr(p, "ip=");
+    const char* ip = strstr(line, "ip=");
    if(ip) {
        ip += 3;
-        // Find end (comma, newline, or end of string)
        size_t len = 0;
        while(ip[len] && ip[len] != ',' && ip[len] != '\n' && ip[len] != '\r') {
            len++;
        }
-        if(len > 0 && len < IP_BUFFER_SIZE) {
-            memcpy(stats->ip_address, ip, len);
-            stats->ip_address[len] = '\0';
+        if(len > 0 && len < ip_size) {
+            memcpy(ip_out, ip, len);
+            ip_out[len] = '\0';
        }
    }

    return true;
 }

-// Parse STATS: STATS:ip=x.x.x.x,total=N,pending=N,processed=N
-static bool parse_stats(const char* line, CanStats* stats) {
-    if(strncmp(line, "STATS:", 6) != 0) {
+// Parse RESULT message
+static bool parse_result(const char* line, ResultMessage* result) {
+    if(strncmp(line, "RESULT:", 7) != 0) {
        return false;
    }

-    const char* p = line + 6;
+    const char* p = line + 7;

-    // Parse ip=
-    const char* ip = strstr(p, "ip=");
-    if(ip) {
-        ip += 3;
-        const char* end = strchr(ip, ',');
-        if(end && (size_t)(end - ip) < IP_BUFFER_SIZE) {
-            size_t len = end - ip;
-            memcpy(stats->ip_address, ip, len);
-            stats->ip_address[len] = '\0';
-        }
+    // Parse status
+    if(strncmp(p, "OK|", 3) == 0) {
+        result->success = true;
+        p += 3;
+    } else if(strncmp(p, "ERROR|", 6) == 0) {
+        result->success = false;
+        p += 6;
+    } else {
+        return false;
    }

-    // Parse total=
-    const char* total = strstr(p, "total=");
-    if(total) {
-        stats->total_frames = strtoul(total + 6, NULL, 10);
+    // Parse message
+    size_t len = strlen(p);
+    if(len >= MAX_LINE_LENGTH) {
+        len = MAX_LINE_LENGTH - 1;
    }
+    memcpy(result->message, p, len);
+    result->message[len] = '\0';

-    // Parse pending=
-    const char* pending = strstr(p, "pending=");
-    if(pending) {
-        stats->pending_frames = strtoul(pending + 8, NULL, 10);
-    }
-
-    // Parse processed=
-    const char* processed = strstr(p, "processed=");
-    if(processed) {
-        stats->processed_frames = strtoul(processed + 10, NULL, 10);
-    }
-
-    stats->data_received = true;
-    stats->last_update_tick = furi_get_tick();
+    result->has_result = true;
+    result->show_until_tick = furi_get_tick() + 3000; // Show for 3 seconds

    return true;
 }
@@ -161,13 +315,17 @@ static void process_line(CanMonitorApp* app, const char* line) {

    if(app->conn_state == StateConnecting) {
        // Waiting for ACK
-        if(parse_ack(line, &app->stats)) {
-            FURI_LOG_I(TAG, "ACK received, IP: %s", app->stats.ip_address);
+        if(parse_ack(line, app->ip_address, sizeof(app->ip_address))) {
+            FURI_LOG_I(TAG, "ACK received, IP: %s", app->ip_address);
            app->conn_state = StateConnected;
        }
    } else if(app->conn_state == StateConnected) {
-        // Parse stats
-        parse_stats(line, &app->stats);
+        // Parse PAGE or RESULT
+        if(line[0] == 'P') {
+            parse_page(line, &app->page);
+        } else if(line[0] == 'R') {
+            parse_result(line, &app->result);
+        }
    }

    furi_mutex_release(app->mutex);
@@ -201,6 +359,7 @@ static int32_t worker_thread(void* ctx) {

            furi_mutex_acquire(app->mutex, FuriWaitForever);
            app->conn_state = StateConnecting;
+            clear_page_content(&app->page);
            furi_mutex_release(app->mutex);
            view_port_update(app->view_port);
        }
@@ -232,12 +391,18 @@ static int32_t worker_thread(void* ctx) {

        // Check data timeout (5 sec) - only when connected
        furi_mutex_acquire(app->mutex, FuriWaitForever);
-        if(app->conn_state == StateConnected && app->stats.data_received) {
-            if((furi_get_tick() - app->stats.last_update_tick) > 5000) {
-                app->stats.data_received = false;
+        if(app->conn_state == StateConnected && app->page.data_valid) {
+            if((furi_get_tick() - app->page.last_update_tick) > 5000) {
+                app->page.data_valid = false;
                view_port_update(app->view_port);
            }
        }
+
+        // Clear result message after timeout
+        if(app->result.has_result && furi_get_tick() > app->result.show_until_tick) {
+            app->result.has_result = false;
+            view_port_update(app->view_port);
+        }
        furi_mutex_release(app->mutex);
    }

@@ -245,24 +410,166 @@ static int32_t worker_thread(void* ctx) {
    return 0;
 }

-// Draw welcome page
+// Draw header with page indicator
+static void draw_header(Canvas* canvas, CanMonitorApp* app) {
+    // Page indicator
+    char page_str[16];
+    snprintf(
+        page_str,
+        sizeof(page_str),
+        "[%d/%d]",
+        app->page.page_index + 1,
+        app->page.total_pages);
+    canvas_draw_str(canvas, 0, 8, page_str);
+
+    // Title (centered)
+    uint16_t title_width = canvas_string_width(canvas, app->page.title);
+    uint16_t title_x = (128 - title_width) / 2;
+    canvas_draw_str(canvas, title_x, 8, app->page.title);
+
+    // Connection indicator (right side)
+    if(app->page.data_valid) {
+        canvas_draw_disc(canvas, 122, 4, 3);
+    } else {
+        canvas_draw_circle(canvas, 122, 4, 3);
+    }
+
+    // Separator line
+    canvas_draw_line(canvas, 0, 11, 128, 11);
+}
+
+// Draw footer with navigation hints
+static void draw_footer(Canvas* canvas, PageType page_type, uint8_t total_pages, uint8_t current_page) {
+    canvas_draw_line(canvas, 0, 54, 128, 54);
+
+    canvas_set_font(canvas, FontSecondary);
+
+    // Left arrow (if not first page)
+    if(current_page > 0) {
+        canvas_draw_str(canvas, 2, 63, "<");
+    }
+
+    // Center action hint
+    const char* hint = "";
+    switch(page_type) {
+        case PageTypeInfo:
+            hint = "";
+            break;
+        case PageTypeMenu:
+            hint = "OK=Select";
+            break;
+        case PageTypeConfirm:
+            hint = "OK=Yes Back=No";
+            break;
+    }
+    uint16_t hint_width = canvas_string_width(canvas, hint);
+    canvas_draw_str(canvas, (128 - hint_width) / 2, 63, hint);
+
+    // Right arrow (if not last page)
+    if(current_page < total_pages - 1) {
+        canvas_draw_str(canvas, 122, 63, ">");
+    }
+}
+
+// Draw info page
+static void draw_info_page(Canvas* canvas, CanMonitorApp* app) {
+    canvas_set_font(canvas, FontSecondary);
+
+    uint8_t y = 22;
+    for(uint8_t i = 0; i < app->page.line_count && i < MAX_LINES; i++) {
+        canvas_draw_str(canvas, 2, y, app->page.lines[i]);
+        y += 10;
+    }
+}
+
+// Draw menu page
+static void draw_menu_page(Canvas* canvas, CanMonitorApp* app) {
+    canvas_set_font(canvas, FontSecondary);
+
+    uint8_t y = 22;
+    for(uint8_t i = 0; i < app->page.action_count && i < MAX_ACTIONS; i++) {
+        // Selection indicator
+        if(i == app->page.selected_index) {
+            canvas_draw_box(canvas, 0, y - 8, 128, 10);
+            canvas_set_color(canvas, ColorWhite);
+        }
+
+        canvas_draw_str(canvas, 4, y, app->page.actions[i]);
+
+        if(i == app->page.selected_index) {
+            canvas_set_color(canvas, ColorBlack);
+        }
+
+        y += 10;
+    }
+}
+
+// Draw confirm page
+static void draw_confirm_page(Canvas* canvas, CanMonitorApp* app) {
+    canvas_set_font(canvas, FontSecondary);
+
+    // Message (centered)
+    if(app->page.line_count > 0) {
+        uint16_t msg_width = canvas_string_width(canvas, app->page.lines[0]);
+        canvas_draw_str(canvas, (128 - msg_width) / 2, 30, app->page.lines[0]);
+    }
+
+    // Yes/No options
+    uint8_t btn_y = 44;
+    uint8_t yes_x = 32;
+    uint8_t no_x = 80;
+
+    // Draw Yes
+    if(app->page.selected_index == 0) {
+        canvas_draw_box(canvas, yes_x - 2, btn_y - 8, 24, 12);
+        canvas_set_color(canvas, ColorWhite);
+    }
+    canvas_draw_str(canvas, yes_x, btn_y, "Yes");
+    if(app->page.selected_index == 0) {
+        canvas_set_color(canvas, ColorBlack);
+    }
+
+    // Draw No
+    if(app->page.selected_index == 1) {
+        canvas_draw_box(canvas, no_x - 2, btn_y - 8, 20, 12);
+        canvas_set_color(canvas, ColorWhite);
+    }
+    canvas_draw_str(canvas, no_x, btn_y, "No");
+    if(app->page.selected_index == 1) {
+        canvas_set_color(canvas, ColorBlack);
+    }
+}
+
+// Draw result overlay
+static void draw_result_overlay(Canvas* canvas, ResultMessage* result) {
+    // Semi-transparent background
+    canvas_set_color(canvas, ColorWhite);
+    canvas_draw_box(canvas, 10, 20, 108, 28);
+    canvas_set_color(canvas, ColorBlack);
+    canvas_draw_frame(canvas, 10, 20, 108, 28);
+
+    canvas_set_font(canvas, FontPrimary);
+    const char* status = result->success ? "OK" : "Error";
+    canvas_draw_str(canvas, 14, 32, status);
+
+    canvas_set_font(canvas, FontSecondary);
+    canvas_draw_str(canvas, 14, 44, result->message);
+}
+
+// Draw welcome/connecting screen
 static void draw_welcome(Canvas* canvas, CanMonitorApp* app) {
    canvas_clear(canvas);

-    // Title
    canvas_set_font(canvas, FontPrimary);
    canvas_draw_str_aligned(canvas, 64, 8, AlignCenter, AlignCenter, "CAN Monitor");

    canvas_set_font(canvas, FontSecondary);
+    canvas_draw_str_aligned(canvas, 64, 22, AlignCenter, AlignCenter, "RPI5 Dynamic UI");

-    // Subtitle
-    canvas_draw_str_aligned(canvas, 64, 22, AlignCenter, AlignCenter, "RPI5 CAN Sniffer");
-
-    // Status based on connection state
    furi_mutex_acquire(app->mutex, FuriWaitForever);
    ConnectionState state = app->conn_state;
-    char ip_buf[IP_BUFFER_SIZE];
-    strncpy(ip_buf, app->stats.ip_address, IP_BUFFER_SIZE);
+    char ip_buf[32];
+    strncpy(ip_buf, app->ip_address, sizeof(ip_buf));
    furi_mutex_release(app->mutex);

    switch(state) {
@@ -283,139 +590,167 @@ static void draw_welcome(Canvas* canvas, CanMonitorApp* app) {
                snprintf(buf, sizeof(buf), "RPI5: %s", ip_buf);
                canvas_draw_str_aligned(canvas, 64, 46, AlignCenter, AlignCenter, buf);
            }
-            canvas_draw_str_aligned(canvas, 64, 58, AlignCenter, AlignCenter, "Press RIGHT >");
+            canvas_draw_str_aligned(canvas, 64, 58, AlignCenter, AlignCenter, "Waiting for data...");
            break;
    }
 }

-// Draw stats page
-static void draw_stats(Canvas* canvas, CanMonitorApp* app) {
-    char buf[64];
-
-    canvas_clear(canvas);
-
-    // Header
-    canvas_set_font(canvas, FontPrimary);
-    canvas_draw_str(canvas, 10, 10, "CAN Monitor");
-
-    // Navigation hint
-    canvas_draw_str(canvas, 0, 10, "<");
-
-    // Connection indicator
-    furi_mutex_acquire(app->mutex, FuriWaitForever);
-    bool data_ok = app->stats.data_received;
-    furi_mutex_release(app->mutex);
-
-    if(data_ok) {
-        canvas_draw_disc(canvas, 120, 6, 4);
-    } else {
-        canvas_draw_circle(canvas, 120, 6, 4);
-    }
-
-    // Separator
-    canvas_draw_line(canvas, 0, 14, 128, 14);
-
-    canvas_set_font(canvas, FontSecondary);
-
-    furi_mutex_acquire(app->mutex, FuriWaitForever);
-
-    // IP Address
-    if(strlen(app->stats.ip_address) > 0) {
-        snprintf(buf, sizeof(buf), "IP: %s", app->stats.ip_address);
-    } else {
-        snprintf(buf, sizeof(buf), "IP: ---");
-    }
-    canvas_draw_str(canvas, 0, 26, buf);
-
-    // Total frames
-    snprintf(buf, sizeof(buf), "Total frames: %lu", (unsigned long)app->stats.total_frames);
-    canvas_draw_str(canvas, 0, 38, buf);
-
-    // Pending frames
-    snprintf(buf, sizeof(buf), "Pending: %lu", (unsigned long)app->stats.pending_frames);
-    canvas_draw_str(canvas, 0, 50, buf);
-
-    // Processed frames
-    snprintf(buf, sizeof(buf), "Processed: %lu", (unsigned long)app->stats.processed_frames);
-    canvas_draw_str(canvas, 4, 62, buf);
-
-    furi_mutex_release(app->mutex);
-}
-
 // Draw callback
 static void draw_callback(Canvas* canvas, void* ctx) {
    CanMonitorApp* app = ctx;

-    switch(app->current_page) {
-        case PageWelcome:
-            draw_welcome(canvas, app);
+    furi_mutex_acquire(app->mutex, FuriWaitForever);
+
+    // Check if we should show welcome screen
+    if(app->conn_state != StateConnected || !app->page.data_valid) {
+        furi_mutex_release(app->mutex);
+        draw_welcome(canvas, app);
+        return;
+    }
+
+    canvas_clear(canvas);
+    canvas_set_font(canvas, FontPrimary);
+
+    // Draw header
+    draw_header(canvas, app);
+
+    // Draw content based on page type
+    switch(app->page.page_type) {
+        case PageTypeInfo:
+            draw_info_page(canvas, app);
            break;
-        case PageStats:
-            draw_stats(canvas, app);
+        case PageTypeMenu:
+            draw_menu_page(canvas, app);
+            break;
+        case PageTypeConfirm:
+            draw_confirm_page(canvas, app);
            break;
    }
+
+    // Draw footer
+    draw_footer(canvas, app->page.page_type, app->page.total_pages, app->page.page_index);
+
+    // Draw result overlay if present
+    if(app->result.has_result) {
+        draw_result_overlay(canvas, &app->result);
+    }
+
+    furi_mutex_release(app->mutex);
 }

 // Input callback
 static void input_callback(InputEvent* event, void* ctx) {
    CanMonitorApp* app = ctx;

-    if(event->type == InputTypeShort) {
-        furi_mutex_acquire(app->mutex, FuriWaitForever);
+    if(event->type != InputTypeShort && event->type != InputTypeRepeat) {
+        return;
+    }

+    furi_mutex_acquire(app->mutex, FuriWaitForever);
+
+    // Handle welcome screen input
+    if(app->conn_state == StateDisconnected) {
+        if(event->key == InputKeyOk) {
+            app->send_init = true;
+        } else if(event->key == InputKeyBack) {
+            app->running = false;
+        }
+        furi_mutex_release(app->mutex);
+        return;
+    }
+
+    // Handle connected state input
+    if(app->conn_state == StateConnected && app->page.data_valid) {
        switch(event->key) {
-            case InputKeyOk:
-                if(app->current_page == PageWelcome && app->conn_state == StateDisconnected) {
-                    // Start handshake
-                    app->send_init = true;
+            case InputKeyUp:
+                if(app->page.page_type == PageTypeMenu && app->page.selected_index > 0) {
+                    app->page.selected_index--;
+                    view_port_update(app->view_port);
+                } else if(app->page.page_type == PageTypeConfirm) {
+                    app->page.selected_index = 0; // Yes
+                    view_port_update(app->view_port);
                }
                break;

-            case InputKeyRight:
-                // Only allow if connected
-                if(app->current_page == PageWelcome && app->conn_state == StateConnected) {
-                    app->current_page = PageStats;
+            case InputKeyDown:
+                if(app->page.page_type == PageTypeMenu &&
+                   app->page.selected_index < app->page.action_count - 1) {
+                    app->page.selected_index++;
+                    view_port_update(app->view_port);
+                } else if(app->page.page_type == PageTypeConfirm) {
+                    app->page.selected_index = 1; // No
                    view_port_update(app->view_port);
                }
                break;

            case InputKeyLeft:
-                if(app->current_page == PageStats) {
-                    app->current_page = PageWelcome;
-                    view_port_update(app->view_port);
+                // Navigate to previous page
+                uart_send(app, "CMD:NAV:prev\n");
+                break;
+
+            case InputKeyRight:
+                // Navigate to next page
+                uart_send(app, "CMD:NAV:next\n");
+                break;
+
+            case InputKeyOk:
+                if(app->page.page_type == PageTypeMenu) {
+                    // Send selection
+                    char cmd[32];
+                    snprintf(cmd, sizeof(cmd), "CMD:SELECT:%d\n", app->page.selected_index);
+                    uart_send(app, cmd);
+                } else if(app->page.page_type == PageTypeConfirm) {
+                    if(app->page.selected_index == 0) {
+                        uart_send(app, "CMD:CONFIRM\n");
+                    } else {
+                        uart_send(app, "CMD:CANCEL\n");
+                    }
                }
                break;

            case InputKeyBack:
-                if(app->current_page == PageWelcome) {
-                    app->running = false;
-                } else {
-                    app->current_page = PageWelcome;
+                if(app->page.page_type == PageTypeConfirm) {
+                    // Cancel confirmation
+                    uart_send(app, "CMD:CANCEL\n");
+                } else if(app->page.page_index == 0) {
+                    // On first page, disconnect
+                    uart_send(app, "STOP:flipper\n");
+                    app->conn_state = StateDisconnected;
+                    clear_page_content(&app->page);
                    view_port_update(app->view_port);
+                } else {
+                    // Go to previous page
+                    uart_send(app, "CMD:NAV:prev\n");
                }
                break;

            default:
                break;
        }
-
-        furi_mutex_release(app->mutex);
+    } else if(event->key == InputKeyBack) {
+        // Disconnect and exit
+        if(app->conn_state != StateDisconnected) {
+            uart_send(app, "STOP:flipper\n");
+        }
+        app->running = false;
    }
+
+    furi_mutex_release(app->mutex);
 }

 // Main entry point
 int32_t can_monitor_app(void* p) {
    UNUSED(p);

-    FURI_LOG_I(TAG, "Starting CAN Monitor");
+    FURI_LOG_I(TAG, "Starting CAN Monitor (Dynamic UI)");

    // Allocate app
    CanMonitorApp* app = malloc(sizeof(CanMonitorApp));
    memset(app, 0, sizeof(CanMonitorApp));
    app->running = true;
-    app->current_page = PageWelcome;
    app->conn_state = StateDisconnected;
    app->send_init = false;
+    clear_page_content(&app->page);

    // Mutex
    app->mutex = furi_mutex_alloc(FuriMutexTypeNormal);
@@ -440,7 +775,7 @@ int32_t can_monitor_app(void* p) {
    }

    // Start worker
-    app->worker_thread = furi_thread_alloc_ex("CanMonitorWorker", 1024, worker_thread, app);
+    app->worker_thread = furi_thread_alloc_ex("CanMonitorWorker", 2048, worker_thread, app);
    furi_thread_start(app->worker_thread);

    // Init GUI
@@ -450,7 +785,7 @@ int32_t can_monitor_app(void* p) {
    view_port_input_callback_set(app->view_port, input_callback, app);
    gui_add_view_port(app->gui, app->view_port, GuiLayerFullscreen);

-    FURI_LOG_I(TAG, "GUI initialized, waiting for user input");
+    FURI_LOG_I(TAG, "GUI initialized");

    // Main loop
    while(app->running) {
@@ -460,7 +795,7 @@ int32_t can_monitor_app(void* p) {
    FURI_LOG_I(TAG, "Shutting down");

    // Send disconnect signal
-    if(app->conn_state == StateConnected) {
+    if(app->conn_state != StateDisconnected) {
        uart_send(app, "STOP:flipper\n");
    }