I have resolved the RC problems. It was a defect receiver in fact, and after changing to a new one, the binding process worked fine, as well as the radio controls calibration.
Now the next step : calibrating and arming the ESC's. I think the calibrating worked, as I heard a lot of different bleeps and melodies, but as I bring the throttle back down after a few minutes, I have no response of the motors to the throttle. Also after unplugging the lipo and repowering, I tried to arm (throttle to the right bottom for 3 seconds ...) but no response .....
What's wrong now ?
I had the switch in fly mode, I suppose that's OK ? The blue LED on the board is blinking slowly.
Let us address the ESC calibration. Leave the transmitter on with full throttle. and the esc you want calibrated plugged into your throttle channel. Plug in the ESC. You will hear a few beeps, I cant remember 3 or 4 maybe. Then immediately reduce throttle to 0%. You will hear a confirmation beep/s. Then unplug the esc from the lipo, then plug it back in. After the esc has booted you should have full control over it using your throttle. Calibrating the escs takes less than 20 seconds, its the unplugging and plugging and losing count ETC that make it a pain. I will share a "lazy secret". Instead of unplugging the 3pin connector from the PDB on the arducopter, Use a small jump wire (1 end female sil, other end male sil) and plug the receiver into the 4 pin sil motor connector that gets plugged into the APM. Works for me :)
Not being able to arm can be un calibrated escs or perhaps a reversed channel on your transmitter or APM planner.
Calibrate the ESCs, if that doesnt fix the problem. Check in APM planner that you have the correct stuff mapped to the correct places, as well as going in the correct directions. If you move the stick to the right, the green bar should move to the right.
Wash, rinse, repeat ;)
If you dont come right with the esc calibration, let me know and ill post a video of the process :)
Thanks a lot for your detailed explanation. I'll address this tomorrow, no time today.
In the meanwhile, if ever you have that video ready and by hand, I wouldn't mind of course. Visuals are always easier for the brains, hé :) ......
I have admit that the original JrDrones videos on this were what allowed me to first figure this out.
I found the answer myself to the stick problem : Both yaw and roll were inversed on my radio, I fixed that.
The arming is still kind of funny. Is it supposed to take a couple of minutes before being ready to arm ? I have no reaction to the arming with the stick, and suddenly some time later I get a response.....