To monitor the control light of my cooker and oven I mounted two LDRs (light dependent resistor) on a TinyTX sender. The LDR recognizes changes of the light and the TinxTX sensor is redirecting this information to my Raspberry Pi. The Raspberry Pi is checking the local network for my mobile phone and notifies me with my android app when I am no longer at home and the cooker is still on.
