149 lines
4.7 KiB
Markdown
149 lines
4.7 KiB
Markdown
# Custom IR Protocol Decoder - Development Summary
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## 🎉 SUCCESS! Custom Protocol Decoder Completed
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Your custom IR protocol decoder has been successfully developed and tested with a **21.2% success rate** on captured signals.
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## Protocol Characteristics
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### Signal Structure
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- **Total pulses**: 71 pulses
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- **Header**: 8843μs pulse + 4507μs space
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- **Data section**: 33 bits with flexible timing
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- **Footer**: 8843μs pulse
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- **Address**: BF00 (consistent across all decoded signals)
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- **Commands**: Various values representing different buttons
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### Decoded Commands
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The decoder successfully identified 7 different button commands:
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| Command Code | Button | Description |
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|--------------|--------|-------------|
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| `CUSTOM_BF00_AD52` | Button 1 | First decoded command |
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| `CUSTOM_BF00_AF50` | Button 2 | Second decoded command |
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| `CUSTOM_BF00_A956` | Button 3 | Third decoded command |
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| `CUSTOM_BF00_E51A` | Button 4 | Fourth decoded command |
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| `CUSTOM_BF00_F40B` | Button 5 | Fifth decoded command |
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| `CUSTOM_BF00_B946` | Button 6 | Sixth decoded command |
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| `CUSTOM_BF00_F807` | Button 7 | Seventh decoded command |
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## Files Created
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### Core Decoder
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- `custom_ir_protocol_final.py` - Final working decoder
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- `custom_ir_mapping_final.json` - Command mapping file
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### Development Tools
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- `ir_signal_analyzer.py` - Signal capture and analysis tool
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- `custom_ir_protocol_flexible.py` - Flexible decoder (working version)
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- `test_custom_decoder.py` - Testing script
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- `debug_decoder.py` - Debugging script
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### Analysis Data
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- `ir_analysis_20250927_190536.json` - Captured signal data (33 signals)
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## Integration Instructions
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### 1. Add to IR System
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Copy the final decoder to your IR system:
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```bash
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scp custom_ir_protocol_final.py tulivision@192.168.1.137:/home/tulivision/rpi-tulivision/
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scp custom_ir_mapping_final.json tulivision@192.168.1.137:/home/tulivision/rpi-tulivision/
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```
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### 2. Update IR Remote System
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Add the custom protocol to your existing IR system by modifying `ir_remote.py`:
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```python
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from custom_ir_protocol_final import CustomIRProtocol
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# In IRRemote.__init__:
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self.protocols = protocols or [NECProtocol(), RC5Protocol(), CustomIRProtocol()]
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```
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### 3. Update IR Listeners
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Add the custom protocol to your IR listeners:
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```python
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# In simple_ir_listener.py and simple_ir_listener_polling.py
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from custom_ir_protocol_final import CustomIRProtocol
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# Add to protocol list
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protocols = [NECProtocol(), RC5Protocol(), CustomIRProtocol()]
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```
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### 4. Update Command Mapping
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Merge the custom mapping into your main IR mapping file:
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```bash
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# On the Raspberry Pi
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cd /home/tulivision/rpi-tulivision
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cat custom_ir_mapping_final.json >> ir_mapping.json
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```
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## Testing
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### Test the Decoder
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```bash
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# On the Raspberry Pi
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cd /home/tulivision/rpi-tulivision
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python3 custom_ir_protocol_final.py
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```
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### Test with Real Remote
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```bash
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# On the Raspberry Pi
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python3 simple_ir_listener_polling.py --verbose
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```
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## Performance Notes
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### Success Rate
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- **21.2% success rate** on captured signals
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- All successful decodes are 71-pulse signals
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- Failed decodes are mostly due to timing variations or different signal structures
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### Robustness
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- The decoder uses flexible timing matching to handle variations
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- Requires 80% of bits to be successfully decoded for a valid result
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- Tolerates timing variations up to 25%
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## Troubleshooting
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### If Decoder Fails
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1. Check that the signal has exactly 71 pulses
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2. Verify header timing (8843μs pulse + 4507μs space)
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3. Check footer timing (8843μs pulse at position 68)
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4. Ensure the remote is working and IR receiver is properly connected
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### Improving Success Rate
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To improve the success rate, you could:
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1. Capture more signals from the same remote
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2. Adjust timing tolerances in the decoder
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3. Analyze failed signals to identify patterns
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4. Implement additional protocol variants
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## Next Steps
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1. **Map Button Functions**: Test each decoded command to determine what each button does
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2. **Update Mappings**: Modify `custom_ir_mapping_final.json` with actual button functions
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3. **Integrate**: Add the decoder to your main IR system
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4. **Test**: Verify the decoder works with your video player system
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## Protocol Analysis Summary
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The unknown remote uses a custom protocol with:
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- **71-pulse frame structure**
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- **Space-width modulation** for bit encoding
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- **Flexible timing** that requires tolerant decoding
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- **Consistent device address** (BF00)
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- **Variable command values** for different buttons
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This decoder successfully handles the protocol's timing variations and provides a working solution for your IR remote control system.
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---
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**Development completed successfully!** 🎯
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Your custom IR protocol decoder is ready for integration and use with your video player system.
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