# CAN IO Board GUI

Tkinter front-end for the CAN IO board via an SLCAN serial adapter.

```bash
pip install -r requirements.txt
python can_io_gui.py
```

1. Pick the SLCAN device's serial port (⟳ refreshes the list).
2. Bitrate 500000 and base ID 0x100 match the firmware defaults.
3. Connect — the GUI requests status automatically and then tracks the
   board's heartbeat/change frames.

Green LED = active input / energised output. Buttons send SET_OUTPUT /
TOGGLE commands; the board confirms with a status frame, which is what
actually updates the display. Frame formats: ../PROTOCOL.md.