Just to add another option: $25 for the sensor and $25 for 433Mhz receiver. Howto is here. Configuration is pretty easy. With Ubuntu no need to compile anything… Everything is available through apt.
Just to add another option: $25 for the sensor and $25 for 433Mhz receiver. Howto is here. Configuration is pretty easy. With Ubuntu no need to compile anything… Everything is available through apt.