I'll start saying that I'm almost noob on electronics, so that's why I'm here. I'm looking for a smart way to check the state of an RF relay module remotely. This is the relay module:
The module has its own remote control that opens or closes the relay contacts. My goal is to activate the relay with a RF trasmitter linked to the Raspberry Pi, instead using the remote control. I'm often out of home, so I need to do some tests through the Raspberry and check if it activates or not.
I thought about reading state of a GPIO in some way connected to the relay, but I have no idea how to do it?