the plan: to remotely turn on and off lights in my appartment, I need to plug my 433Mhz remote light control to my DTMF phone.
why? When standing on the bar “21” we cannot identify our own house, so it would be nice to switch the lights on/off from afar. The 21 os located in the 21st floor of a high building in kaiserslautern, so theoretically we could see our flat (from our flat, we see the bar).
The hack: idea would be the use one of these babies (a DTMF decoder) and call my own phone, then transfer the DTMF signals to a manipulated remote control. Alternase tively we could place some 230V relais at the DTMF decoder. Hm, how to pick up a phone automatically? could use the answering machine for that.
alternative approach: have a friend sit at home and do the lights on call. Perhaps attach a beer to the friend.