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
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.