[Tiakson] just wrapped up the construction of a quadcopter which piqued our interest due to the unexpected mix of hardware he used.
A good portion of the copter is made up of the essential bits we have come to expect from a quad rotor system. Instead of using an Xbee or hobby wireless controller however, [Tiakson] opted to use an old Fonera router running OpenWRT to control the system. He wrote special software that allows him to direct the quadcopter using an HTML 5 interface, adding a few kernel tweaks along the way that enabled him to emulate I2C ports over GPIO pins.
The Fonera takes in data from Wii nunchuck and Motion+ sensors, relaying commands to the on-board PIC 16F976 microcontroller. The PIC is used to manage the electronic speed controller modules using PWM, which the Fonera could not handle on its own.
This is a great use for a old router, and the cost is obviously far cheaper than buying off the shelf wireless control modules. We would love to hear how much extra weight the Fonera adds, as well as if there is any controller lag introduced by the web-based interface.
Continue reading to see a quick demo video of the quadcopter in action.