This is my first build and am running into snags trying to perform calibration of the ESCs. I’m using four Lumenier 12a (SimonK AutoShot) ESCs (see: http://www.getfpv.com/lumenier-12a-esc-w-simonk-autoshot-2-4s-n-fet.html). According to that details page for the ESCs:
The Simonk AutoShot firmware is pre-calibrated with endpoints 1060us - 1860us.
Not sure if they’re suggesting that calibration isn’t necessary? (Which doesn’t sound right to me.)
When I throttle up and turn on power, the LED flashes as expected (multicolored fast rotation) and I hear a steady and periodic “beep”. When I pull the power and plug in again, I hear the same beep pattern and the LED does the same thing. From the videos I’ve seen, I thought upon plugging in the second time, I should hear a different beep pattern indicating that I should move throttle back down to zero. Then hear another beep pattern, toggle the power, and be good to go.
Does anyone have any ideas on things I can try? What information would be helpful to troubleshoot this further? I’m thinking I’ll make a video this weekend and post that here as well.
Thanks for any input!
Take care,
Bryan
Hey all, I just posted a video on my build which should give a little more context: https://www.youtube.com/watch?v=NS3kTKlxAbk. If anyone knowns next steps for troubleshooting my ESCs I would really appreciate the help!
As I understand it, my next step is really to try a radio transmitter to directly calibrate an ESC (outside of the Navio2 / Pi3 setup). Again, since this is my first build, I’d appreciate any help or suggestions!
Take care,
Bryan
Getting a little bit closer to lift off. So I used the Navio2 servo example to validate the ESCs. Finally I have a way to troubleshoot this more. 
The next (related) snag I’m running into is this: Channel 0 initially worked for a bit then stopped. When I tried channel 1, it worked (like 2 and 3) but also seems to turn on channel 0. Probably bad connection somewhere? Soldering issue? Check out: https://www.youtube.com/watch?v=7Sc4LjmbmQw
Anyone have any thoughts? I’m tracing through the connections now.
Things looking good now! https://youtu.be/qS7PYgn6H2M
(I think the earlier issue I was having was due to my test changes to the Servo example.)
\o/
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Looks good now! What was the problem after all? 
Really it was a mixture of two things. The first was that I expected that I needed to calibrate the ESCs. It turns out that the Lumenier 12a (SimonK AutoShot) ESCs are, in fact, already calibrated with endpoints 1060us - 1860us so the calibration step is not necessary. The second was that I expected ArduQuad to send a signal to the ESCs as soon as I made it through the “RC Not Calibrated” pre-arm check (it seems, anyways, that I need to make it through ALL pre-arm checks before it’ll actually send a signal to the ESCs).
