Hardware-wise, there is an Arduino Nano Every in charge of the LDR module that reads the flashlight input and the 12 V relay that unlocks the door. Be sure to check it out it the video after the ...

Snap Programming Last Updated: 7/27/18 This Arduino module takes past circuits and codes, and applies them to a new program called Snap4Arduino. Snap4Arduino allows us to program an Arduino board in ...