First mini-boards assembled and plugged in!

• Multi mini-board with voltage dividers and pull-ups for channels 1-5 – connected via JST 2-pin for VCC/GND and pin headers for signal in/out
• GND collector board for clean ground routing
• All plugged into the main board

The modular concept works – swap a mini-board, change the JSON config, done. No resoldering, no rewiring.

Next: optocoupler board for RPM (W-terminal) and testing with real VDO sensors on the boat.

github.com/bigbrainlabs/BoatOpenIO (coming soon)