i am looking to build a device that can communicate with a phone and through that phone you could turn on or off a light or a siren with fairly long range 20 to 30 meters (60 to 90 feet). Would anyone be able to help regarding this device. I am looking for it be as small as possible. also i wanted this device to run with fairly low voltage dc power source.
please help with this
Ibles on the Morning News It's cool to see where your ibles end up getting a mention. Here is a CBS Sacramento morning news talkshow…