Datasheet

Button C is #PC5

Button B has a 100K pullup on it so it will work with the ESP8266 (which does not have

an internal pullup available on that pin). You will need to set up a pullup on all other pins for

the buttons to work.

Reset Button

Sometimes its nice to be able to restart your program, so we also have a reset button. It is

tied to the RST pin marked above.