Note that all of the steps in this guide assume that the
MKR Relay Proto Shield is being used; if a different board
is being used, adjust the steps appropriately. This may
require adjusting settings in config.hpp if the sensors
are connected to different Arduino pins.
Install a 3.3KOhm resistor into the through-hole pads behind the A1 screw terminal (or an SMT resistor onto the SMT pads).
Connect a suitable normally-open switch between the 3.3V supply terminal and the A1 terminal.
Connect a two-conductor cable to the COM and NO screw terminals for Relay 1, and connect the other end of the cable to the switch terminals of the opener.
Install a 100KOhm resistor into the through-hole pads behind the A2 screw terminal (or an SMT resistor onto the SMT pads).
Connect a suitable LDR between the 3.3V supply temrminal and the A2 terminal.