Diagnostics

The errors reported by the board are in the form of audible beeps:

• 1 beep (low pitch): Motor error (see possible causes). Are you using a single wheel ?
• 2 beeps (low pitch): ADC timeout triggered by the ADC protection
• 3 beeps (low pitch): Serial communication timeout. Check possible reasons/troubleshooting tips in the wiki section for USART variant
• 4 beeps (low pitch): General timeout (PPM, PWM, Nunchuk). Check possible reasons/troubleshooting tips in the wiki section for PPM variant/PWM variant/Nunchuk variant
• 5 beeps (low pitch): Mainboard temperature warning
• 1 beep slow (medium pitch): Low battery voltage < 36V. More details in the battery section.
• 1 beep fast (medium pitch): Low battery voltage < 35V. More details in the battery section.
• 1 beep fast (high pitch): Backward spinning motors

Please also note that with BEEPS_BACKWARD = 1 (default setting) the board also makes a beep when the motors go backwards. If running hoverserial.ino from Arduino the backward beeps are normal, unless you intentionally disable them.

For a more detailed troubleshooting you can use Debug Serial