This contains info about several buttons:
Code example here.
Code example here.
This button can use the same code as the LK button. This button has only 3 pins:
The pins should match for the extension board connection:
-
- to G (sensor to board)
- middle pin to V (sensor to board)
- S to D27 - or any D pin you want to use, modifying the number used on the code (sensor to board)