The only board compatible with cayenne is the ds2408??
Pretty much any relay board should be compatible. As long as it has a standard 3.3v input it will work absolutely fine.
Same goes for sensors too?
If it’s a sensor that just sends an output signal, sure. If it requires drivers you will have to look at the list in the Add New>Device section of the dashboard to see a list of supported sensors.
Ok, that makes sense.
I was reading up on all the compatible relays, actuators, sensors, etc…