I would change the boxes (schedule times) in the ethernet interface with hapcan programmer. For years i am edited some boxes, but now i cant change it anymore or add some new?
How to connect a cheap motion sensor to a hapcan button input?
The HC-SR501 has 3 pins (5V, GND and Out) and is very popular. I want to build this in "blind cover plate".
Is it possible to use a optocoupler to switch a hapcan button input?