I would like to interface a single digital input (open-collector opto) with an EmonPi (original version) so I can track a boiler status signal in Emoncms.
The pulse input would seem to be an obvious candidate as I am not using it for anything else, but I’d need to capture the logic level of the input and include it in the data.
Any suggestions of ways to achieve what I am after?
That’s pretty opaque. Where to look for “interfacers”in the large pile of Emonpi software?
Easiest solution for me is to use the custom firmware I have already done for an extra EmonTh, but the Emonpi lives in the boiler cupboard, so I didn’t want to add more hardware just to look at one signal.