I have made the node red flow and it talks to a relay module that I have purchased and basically at different points in the cycle it will turn the relays on and off to control hardware like pumps, steam generators and door mechanisms.
So I would like to gather ideas about how i could set up a flow which tests each of the components and what hardware I would need to do it. Because obviously I cant get any data back from the components back up the relays, I assume I would need to make like ammeters and test them that way?
Anyway, I'm not so sure where to start so I thought no harm in asking here. Sorry for the long essay I thought the more detail you had the easier it would be to get answers.