I am trying to do the same thing - read pgm via nodemcu but I thought that the pgm was 12v 50ma which would cause problems. How do you wire the pgm to the board?
Thanks
I have them close relays right now. But the best solution is to just use voltage dividers. I just forgot about them when I built hardware; it’s been a while since I took circuits in college.
Thanks for the quick reply. I have relays with 5v dc+, DC- and in on the switch side but these presumably wouldn’t work. Do you have a link to the version you used and where do the pgm01 and aux+ lines go.
Sorry for the beginner questions but this was such a good idea I wanted to try it.
Yeah I use the PGM outputs (12v) to close 12v relays. I use individual ones that have screw terminals on both sides of the relay. I think I pull the pin low on the nodemcu when the relay closes. I’m probably also relying on the internal pull-up resistors to pull the pin high when the relay opens after the zone has been cleared.