Using a hacksaw, separate the programming board from the MCU board
Modify solder bridge connection on back of MCU board
- SB62 and SB63 - ON (connected)
- SB50 - OFF (disconnected)
- SB54 and SB55 - ON (connected)
Connect serial wires and test serial monitor
- Programming board TX to MCU board RX on CN9 or CN10
- Programming board RX to MCU board TX on CN9 or CN10
Test
- Connect MCU board to WaterBear shield
- Power MCU/WaterBear using battery
- Connect USB from computer to programming board
- Check for output in serial monitor, use reset button restart WaterBear