This is the documentation for the latest (master) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

BBC micro:bit sound


This sample demonstrates how to use a piezo buzzer connected to port P0 on the edge connector of the BBC micro:bit board.


A separate piezo buzzer connected to the board. One example is the MI:Power board that has a piezo buzzer in addition to a coin-cell battery. Resellers of this board can be fairly easily found using online search.

Building and running

The sample can be built as follows:

west build -b bbc_microbit samples/boards/bbc_microbit/sound
west flash

Sample Output

This sample outputs sounds through a connected piezo buzzer based on button presses of the two main buttons. For each press the current output frequency will be printed on the 5x5 LED display.