ESC calibration ALMOST works. I have to fool with the ESC_Calibration parameter but the tail motor does nothing but beep. I get calibration tones from motors 1 & 2 (depending on the ESC_CALIBRATION setting) but the tail motor doesn’t ever enter into calibration mode. Also, I get no calibration tones until AFTER I disarm. I raise throttle, plug in battery, wait for tones, unplug battery, plug back in, wait for tones, arm with button, get the bad beeps from tail, disarm & hear calibration tones from front motors. I have done a proper calibration with arducopter before so this is a mystery.
Also, still no yaw from the tail servo. I have everything wired right. I don’t have these problems on PX4 but that firmware has it’s own bugs related to tricopter. Arducopter is better overall.
For TriCopters you should use the multicopter firmware (i.e. Quad) not the helicopter firmware. This could explain why the ESC calibration wasn’t working and why the FRAME_CLASS parameter kept changing back to 6.
I’ll update the tricopter wiki page today I think.
I must admit, that is confusing. It seems it confused the good folks of QGroundControl as well.
There are only 3 firmware options to download for RC2 on QGC: Heli - APM:CopterV3.5.0rc2 then there is Plane & Rover, which my tricopter is not.
Is there a place I can download the firmware without building it myself? Cannot find via google. QGC wants a .px4, .bin, or .ihx file. I downloaded copter 3.5 rc2 from https://github.com/ArduPilot/ardupilot/releases & got plenty but not what QGC wants.
Sorry, I am a hardware guy, not a firmware guy. I build airframes.
Ah I came across the same bug, I thought this was the newly merged copter firmware so loaded it. It’s worth noting that after I turned everything on, after a while the motors started turning at a reasonable pace even though I hadn’t armed it (and it would have failed prearm checks as I was inside and hadn’t calibrated it). Happened twice, then I realised I must have loaded the wrong firmware and loaded the correct one from the firmware site. Fortunately I always take my props off inside!
Final question: When I click the link you specify & try to download, I get a webpage filled with ascii. Do I copy all that into a text file & save it as .px4?
I don’t want to brick my mini, so asking just in case.
The QGC issues here: https://github.com/mavlink/qgroundcontrol/issues/4528 isn’t related to not being able to get the corret firmware. That is most likely caused by running a stable build which does not know about the firmware server format changes. Can you try runnning a daily build instead and see if you see all firmwares? Daily builds know about the new server format.