"iskess, thanks for Your effort - my problem actually was between the board and the chair :)oh, and btw, I reflashed the original ppm encoder back and it works with that (at least d4r - haven't tried x8r).but i noticed one thing - dunno if that's…"

"PPM yes, confirmed finally - my problem was most probably bad quality shorting of 2&3.
(even used oscilloscope to check whether receiver outputs ppm or not :) )"

"nope, didn't help:( not 900 any more, 1500s now but still not moving:("

"on th eother hand - is it this? http://copter.ardupilot.com/wiki/common-autopilots/common-apm25-and..."

"iskess, thanks for your input! any idea where i can find the original hex? sorry, i dont even know how to start looking for it :("

"Thanks Tony - I got the hex, flashed it (all ok) - but still no luck..when trying to calibrate radio, all the values are @ 900.
I have following color wires on the ribbon that goes into lower left of the board (if usb connector is on top left):…"

"Do i see correctly that you are using cppm with hkpilot micro? If so, can you please explain how did you get it working? Ive been trying to do this 2 days now, no luck. And i'm a complete newbie with both apm and cppm :)"

"Hector, care to elaborate the process a little more? I'm struggling here with the same thing and it is my first APM (third model in fact) and would really appreciate some help, guide or something..
I have this HKpilot micro APM board and D4R-II…"