I have made a Wii nunchuck wireless by xbee, and one of the applications is a garage door opener. It all works, but the range is terrible. The receiver part is inside a plastic enlosure on the wall in the garage, and I am trying to use the nunchuck from my car. Both xbees are series 1, 1mW. They should be a few hundred meters in open air, but I can barely open the garage from outside the garage door, and certainly not from inside the car. I have to walk out to 1-2 m from the door and hope it opens. Any ideas on how to extend the range? I have not seen any series 1 xbees with more than 1mW, and the battery in the nunchuck is only 100mA.