"Since 2011 I have a quadcopter running on Linux OpenWRT with a Fonera 2201. It has not PREEMPT_RT but has SCHED_FIFO priority in the process, Sleeping by default waiting for and alarm fired by itself in each loop. At 70hz main loop there is no…"

"Hi!, I don't undertand the problem 100%. Is the bottleneck in browser because h264 decompression is slow in the browser?
In my case little lag was in the camera side, but not significant. But there was a cheap and low quality one, with MJPEG. In my…"

"Software PWM is not doable with RPi and Linux directly, because Kernel scheduling. You will need a PIC/Arduino to do that job"

"Hi!. Motors are 1100KV. That means the motors spin 1100 rounds per volt you apply. Motors are for 11,1v LiPos (max operating volts). So you get 1100x11,1=12.210 RPM of maximum rotation speed."

"No extra board needed at all. I2C can be emulated with a kernel module."

"I find it perfect for low cost whole control system. I'm running my copter with a Fon Fonera 2201 router as brain and Wifi as radio link. (The lack of current stability is for my scratch custom control program :)). It is not all, because router is…"

"Well, control system is completely home made, because it runs into Fonera and is extremely experimental. It was my first PID tuning, and R/C experience.
Also, filter is not DCM or Kalman, but Simple Complementary :)"

"Yeah, I'm preparing a source code project in google code. I hava to learn how it works xD
 
http://code.google.com/p/atropos-flight-control/"