A disclaimer first. I am completely new to this area, hence apologize in advance for my naive question.
As mentioned in the title, I am building the Bean Lock as per instructables: http://www.instructables.com/id/Open-source-BLE-door-lock/
All is good, and ordered the Lockitron lock, except the version I have, has 2 limit switches. The instructions are for a single limit switch that is connected to the SPI CLK pin. My question is... which other pin can I use for the other switch?