Surfdado Firmware Buzzer

What is the buzzer?

A small device that beeps when stuff happens

How do I get one?

Any device that emits noise (or light if you prefer that) when 3.3V is applied and is silent when 0V is applied can be used. The one I like is a Grove Active Buzzer:


How to hook it up?

I'm using the servo pin for this purpose. So the servo pin controls the beep, while GND/5V power the beeper. It is also possible to power it straight from the servo pin but some buzzers may not be loud enough at 3.3V.

What firmware do I need?

The buzzer only works on surfdado firmware. Why not on standard firmware? Because Mitch no likey :)

Also: to enable it: in App-General set Enable Servo to TRUE

What's the behavior?

Here's the list of situation when it beeps:
  • Constant beep when foot sensor fault detected at speed

  • Duty tiltback angle set to 0? It will beep instead

  • Triple-beep when high voltage tiltback triggered, triple-beep on low-voltage

  • On boot: short beep when VESC boots, long beep when balance app is ready (and each time you write app config!)

  • Beeping when 2-3 degrees away from overtemperature throttling

  • LV beeps on boot: Are we less than 5V above LV tiltback threshold? Issue 1 beep for each volt below
    that level.

  • Attempting to write config while riding? 3 long beeps tell you “nope”

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