Immersun wireless relay to wireless socket

Sunny days; not using all diverted power. I would like to use the no-volt Immersun relay to trigger a non latched relay at a distance (RF) rather than run a new cable to an outhouse. Has anyone come across readily available equipment to do this. all I can find are key fob types? Thanks Johns

Martin Harizanov is the expert in this area - have a look around his website, I’m fairly certain that he’s done things with small Arduino boards and the RFM69CW radio. But come back here if you can’t find anything.

Thanks and so speedy!