Ivan Li
d1a614fbbb
- Complete hardware communication protocol documentation with: * Add ping/pong health check protocol (0x01) * Add hardware control protocols (0x03 brightness, 0x04 volume) * Add mDNS service discovery specifications * Add connection state management and retry logic * Add comprehensive troubleshooting guide * Update hardware implementation examples - Reorganize project documentation: * Move device auto-refresh docs from root to docs/ directory * Rename files to follow kebab-case convention * Maintain complete technical implementation details - Fix markdown formatting issues: * Add proper language tags to code blocks * Ensure consistent documentation structure
100 lines
4.0 KiB
Markdown
100 lines
4.0 KiB
Markdown
# LED Strip Test Device Auto-Refresh Implementation
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## Overview
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Implemented automatic refresh functionality for the device dropdown in the LED strip test interface. The device list now updates in real-time when devices are discovered, connected, or disconnected.
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## Changes Made
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### 1. Frontend Changes (`src/components/led-strip-test/led-strip-test.tsx`)
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#### Added Event Listener Import
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```typescript
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import { listen } from '@tauri-apps/api/event';
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```
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#### Enhanced Device Loading Logic
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- **Initial Load**: Still loads devices on component mount using `get_boards()`
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- **Real-time Updates**: Added listener for `boards_changed` events from backend
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- **Smart Selection**: Automatically handles device selection when devices are added/removed:
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- If current device disconnects, automatically selects first available device
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- If no device was selected and devices become available, selects the first one
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- Properly cleans up event listeners on component unmount
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#### Improved UI Display
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- **Device Count**: Shows number of devices found in label
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- **Connection Status**: Each device option shows:
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- Status icon (🟢 Connected, 🟡 Connecting, 🔴 Disconnected)
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- Device name and address
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- Connection status text
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- **Empty State**: Shows "Searching..." when no devices found
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#### Type Safety Improvements
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- Updated `BoardInfo` interface to match backend types
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- Proper handling of `connect_status` union type
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- Type-safe status checking functions
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### 2. Backend Integration
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The implementation leverages existing backend infrastructure:
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- **UdpRpc Manager**: Continuously searches for devices via mDNS
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- **Device Monitoring**: Checks device connectivity every second
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- **Event Broadcasting**: Sends `boards_changed` events to frontend
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- **Status Tracking**: Maintains real-time connection status for each device
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## Technical Details
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### Event Flow
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1. Backend `UdpRpc` discovers devices via mDNS service discovery
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2. Backend monitors device connectivity with periodic health checks
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3. Backend broadcasts `boards_changed` events when device list changes
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4. Frontend listens for events and updates UI automatically
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5. Frontend handles device selection logic intelligently
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### Connection Status Types
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- `Connected`: Device is responding to ping requests
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- `Connecting`: Device is in retry state (with retry count)
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- `Disconnected`: Device is not responding
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### Error Handling
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- Graceful fallback if initial device load fails
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- Proper cleanup of event listeners
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- Maintains UI state consistency during device changes
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## Benefits
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1. **Real-time Updates**: No need to manually refresh device list
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2. **Better UX**: Visual indicators for device status
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3. **Automatic Recovery**: Handles device disconnections gracefully
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4. **Type Safety**: Proper TypeScript types prevent runtime errors
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5. **Performance**: Efficient event-driven updates instead of polling
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## Implementation Status
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✅ **Completed**: LED Strip Test device dropdown auto-refresh
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✅ **Already Implemented**: Board Index page auto-refresh (was already working)
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✅ **Type Safety**: Fixed TypeScript type definitions for BoardInfo
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✅ **UI Improvements**: Added status indicators and device count display
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## Testing
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To test the functionality:
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1. Start the application with `npm run tauri dev`
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2. Navigate to LED Strip Test page
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3. Observe device list updates as devices come online/offline
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4. Verify status indicators show correct connection states:
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- 🟢 Connected devices
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- 🟡 Connecting devices (with retry count)
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- 🔴 Disconnected devices
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5. Test device selection behavior when devices disconnect
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6. Check that device count is displayed in the label
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## Code Quality
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- ✅ No TypeScript errors
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- ✅ Proper event listener cleanup
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- ✅ Type-safe status checking
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- ✅ Consistent with existing codebase patterns
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- ✅ Follows SolidJS best practices
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## Future Enhancements
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- Add device refresh button for manual refresh
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- Show device discovery progress indicator
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- Add device connection retry controls
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- Display device ping latency information
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- Add device connection history/logs
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