The first time I got interested in home automation, was when browsing the arduino libraries. That was all about X10, which communicates over power lines. There are switches that can replace the regular light switches and are pretty cheap in the US. If you want such switches here in Switzerland, you’ll be surprised how expensive they are. And routers with X10 to make it accessible from your smart phone start at CHF 400. But what is easier to get here are the plugs with 433Mhz rf controllers. I got a set with one remote and three plugs for CHF 15 at hornbach. Then I ordered two different transmitters from China. One with the nRF905 chipset and an SPI interface. And one for sort of bit banging. I thought the one with SPI was going to be easier to use. I also found some code to interface it. But first I had to know what I need to send.
My first Idea was to use the DVB-T dongle with GnuRadio to sniff the rf protocol. Continue reading “switching the christmas tree online”