Puzzled? Maybe the back will show a bit better what this thing is about:
Still puzzled? Me too – until I assembled the kit and tried it out. There is a light sensor on the back with a bit of sticky tape, which you’re supposed to place over a LED or some other light signal.
What it does is whenever light on or off is detected, it sends out an RF signal at 868 MHz using the FS20 protocol. So any FS20 receiver can pick it up:
The four buttons are a way to adjust all sorts of settings. I haven’t tried those, the factory defaults seem to work just fine for me. As it is this is a nice install-and-forget unit. Hopefully the battery will last a year or more.
Could this report the fridge light? Hmm, not sure – not all packets are coming out. Maybe it’ll be ok if the receiver is close enough.
Cool – another wireless gadget to help automate stuff around the house!