[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.
Continue reading “Fonera-based quadcopter can be controlled from a web browser”
[Viktor], one of our favorite avid hackers, has been playing around with 1-wire systems all this month. What started out as a MicroLAN Fonera has turned into an iButton interface, to a 1-wire powered hub, and finally a 1-wire character driven LCD. Anyone looking at 1-wire systems or OWFS could surely benefit from his testing.
However, if you still haven’t gotten your fill of 1-wire goodness, let us remind you of the 1-wire HVAC and IPv6 to 1-wire protocol translator.
Imagine how surprised we were to discover that by accidentally bricking our router we were executing a brand new attack: Phlashing Denial Of Service (PDOS). This week at EUSecWest, researcher [Rich Smith] will present the theoretical PDOS attack. Instead of taking over control of an embedded system, the attacker turns it into a nonfunctioning brick by flashing it with a broken firmware. Anyone who has flashed a device knows the danger of interrupting the procedure.
Continue reading “Phlashing denial of service attack, the new hype”
I was looking for streaming solutions the other day. Little did I know that [John] would be sending in a hack for adding an mp3 decoder board to the La Fonera. The final device has both a web and command line interface which let you connect to any shoutcast/icecast streaming server. John has even gone so far as to provide the Openwrt image for the router with all of the software components you need.
[Jkx] sent in his fonera SD card experiments. It looks similar to the wrt54g mod – bit banging the interface works, but it’ll be slow. I poked around [Jkx] site and found quite a few goodies. (We’ve noticed his He’s built a nice tube amp, but his push-pull tube amp looks very interesting. Oh, and his simple negative power supply could prove handy,
[buggs187] thought of this when he saw the dual antenna lafonera mod. [Goldserv] picked up a SODIMM off ebay with the right chips and used a SMD removal kit to swap out the 16MB SMD memory chip. After some software patching, he managed to get the full 32MB recognized.