define(`TITLE', `Something really useful: 433MHz Power-Outlet Control') define(`DATE', `2016-11-02') define(`CONTENT', ` We've lots of more or less cheap 433MHz Switchable Power-Outlets in the house, mostly for decorative lights. You get them for under 15€ in the Building Center, three at once with a remote control. Usually, you can control four switches with one remote, period. (A promising exceptions are the device from Intertechno.) Now I was looking for a way to

1. Control the switches from different manufacturers with one remote.
2. Control them from really remote - from the office or from holiday.
3. Control them programmatically.

There are a couple of Arduino libraries out there which are working with this cheap 433MHz senders and receivers from China: I tried several ones, not all a really working, but finally I stopped at https://github.com/sui77/rc-switch, which works really good. First challenge now is to get the codes out of the remotes. For this purposes the rc-switch library provides an example sketch for the Arduino. I extended it a bit and got this: Software for this thing can be found here https://gitlab.com/wolutator/433Receiver.git. This is how it works: The second challenge is to send the codes out into air and let the power switches receive them. This is done with this thing: It is a Arduino Ethernet Board with a PoE-adapter and the 433MHz sender directly attached to it. I glued it under a table in the living room. This thing received messages via MQTT and send them out via 433MHz. The software is here https://gitlab.com/wolutator/Mqtt433Gateway.git BTW: do not expect beautiful software, this has been made on Halloween evening and night when waiting for the kids to come home. ')