M60 schematic. Interested in hacking in a buzzer. Unused or exposed GPIO?

[xgpt]

I see a pin header on the top of the board. I can't tell what it's for, can someone tell me if I could hack in buzzer support? I prefer audible feedback when switching layers. I've never used an M2 based design before though.

[caizelin]

@xgpt Here is the pinout diagram of the exposed pin header, detailing the functions of each pin for your reference:

Pin No.	Mark	Function
1	3V3	3.3V Power supply
2	GND	Power ground
3	RST	nRF52840's Reset pin
4	CLK	nRF52840's SWDCLK pin
5	DIO	nRF52840's SWDIO pin
6	RXD	nRF52840's P0.15 pin
7	TXD	nRF52840's P0.16 pin

Regarding your needs, you can use RXD or TXD pin to control a buzzer.