ZigBee enable our cats
One of our cats keeps running of out of our garden. Some time ago she stayed out for days and we found her in some bushes a few hundred meters away. I'm hoping to implant her with a ZigBee chip so i'm able to trace her. ofcourse i wouldn't implant her with a chip !!! I want to make a module for her collar.

Create a ZigBee enabled soil moisture sensor
Hopefully i will then be reminded when to spray my lawn with water on time.
Sensor

Rain-sensor
Audible warning when it starts raining and i've left things out in the garden.