Troubleshooting
Can't see the WiFi network
Check that the battery is connected and the switch is ON. Listen for the startup tune. If there's no tune, the battery may be flat — charge it over USB and try again.
Robot drives backwards
Swap the two wires on the affected motor, or invert the direction in the settings page.
Servo doesn't move
Check the servo header orientation (brown/black wire to the square pad), confirm the battery is charged, and verify the servo is plugged into the header your control page addresses (S1 or S2).
Board restarts under load
Usually a low battery. Charge fully and retry. If it persists, check for short circuits on the motor wiring.
Forgot the WiFi password
Perform a system recovery (short the PGM pins, power cycle, wait for the tune).
Deleted an important file
Reconnect the board to a computer via USB and re-upload the LittleFS filesystem image through PlatformIO. There is a backup index.html on by default so if you broke the origional you can try connect to 10.10.10.10/indexbak.html