I have a 2 relay board, connected to a Nano and NRF24L01, running the example sketch from mysensors.org. In Domoticz, I see a node with 3 children. It looks like they are presenting correctly.
Now what?

My first goal is to simply learn how to toggle the relay.
Eventually I'd like to use Domoticz to control my home heating. I'll need to switch a relay to do that.

I did find the HVAC thread earlier, but the discussion there already assumed you could control the relays.
Thanks in advance for any help. I'm having a lot of fun setting this up. I'm a coder by day, so I'm hoping I might be able to contribute back at some point.