Tom’s another cool project the Magic Mote thermostat and wireless temperature sensor:
A homemade thermostat up in the basement rafters controls the heating in my home. The smart bit is the radio frequency communication that connects it to a remote temperature sensor.
So, I’m planning a home automation system based around wireless nodes (the Magic Mote featuring a MSP430G2553 low power microcontroller plus NRF24L01+ 2.4 GHz radio module). Part of the motivation for doing this is that the wires between the furnace in the basement and the thermostat 2 floors up have broken and it’s a terrible nuisance to fish new wires in a 100 year old house with knob and tube wiring inside the walls.