This is a discussion to focus the feedback and support of ardupilot on the PixRacer board from AUAV.co.
We believe that all teething problems encountered are now resolved and so we recommend people load Copter-3.3.4 which is available for all multicopters through the Mission Planner's (and other GCS's) Install Firmware screens. Note that because regular Pixhawks are still on Copter-3.3.3 the install icon may show Copter-3.3.3 but rest assured, Copter-3.3.4 will be installed (you can check the version by looking at the very top of the Mission Planner).
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Trying to set a both compasses: internal and external via MP. Had no any problems in the past with Pixhawk but now seems I'm doing something wrong here.
Here is my physical orientation on the copter:
Here is a MP setup screen. Do I need to change here anything or this setup is OK (except calibration - not done yet)?
The pixracer is oriented correctly. Not sure about the GPS.
But I have issues w/ the internal compass, and am wondering if others do..
Its offsets are quite high when using it stacked w/ the acsp4. My internal compass has offsets around 400. I had an auav-x2 in the same frame and its highest offset was 200. Only change is replacing the auav-x2 and its power module with the pixracer and acsp4. Everything else in the frame is the same.
Also, anyone know what to set the "BAT_AMP_PERVOLT" to, for the ACSP4? I was able to measure voltage and set that multiplier correctly, but I don't have an ammeter suitable for this.
Me, in a bigger quad, dissabled the int compass and finish the compass history like that, many flights and no more problems with compass now
If I look on a "dot" located on the compass module, the dot is placed in left bottom corner - GPS oriented like on the picture I provided. Also, saw some post on Drotek forum. I hope it is correct. Anyway, need some confirmation that my MP compass page setup is correct before I will do a calibration.
It looks good to me. Just do the calibration. Worst that can happen if it's wrong, is north won't actually point north. Then you can figure out which way it's wrong.
Need definitely some tests :). Just to clarify, what to change here:
to disable internal compass and use only external?
I have my internal enabled... It fly's fine. The offsets are bad, but it functions.
So, I'd leave your screen exactly how it is, and see if you can get a good calibration.
As long as everything is under 400 for your internal one, it should be OK.
Actually, I think you should uncheck "automatically learn offsets". I'm not sure though.. Personally, I've never used that.
If you can't get a good calibration on the internal compass, then simply uncheck "use this compass" under "compass #2".
I would be careful flying with really high offsets. The newer FW is better at dealing with such things I think but still it can lead to a FC wigging out. I had a fly away lost my quad because of this. This was way back with 3.1 so maybe it's better now... but be careful is all I'm saying. Do you have all arming checks on? No warnings?
The WiFi port is effectively SERIAL1/TELEM1, correct? I haven't looked through the MavESP8266 firmware yet but I'm curious if anyone else is successfully using the WiFi with ArduPilot. I know some firmwares were using a 921k baud rate.
I'll try to collect what I can for useful Pixracer+ArduPilot+WiFi info since I'm guessing many will be using the WiFi in the place of a traditional telemetry radio on small frames. It's a nice convenience that appears to work 'out of the box' with PX4/QGC but not quite yet with ArduPilot. I will dig in further and work it out then report back if no one has got it yet.
Cheers
For now it seems we choose between Pixracer+WiFi using PX4 and QGroundControl, or Pixracer+traditional telemetry using ArduPilot and Mission Planner. I still haven't had time to dig into the MavESP8266 firmware, but I'm not aware of anyone successfully using the WiFi with ArduPilot and Mission Planner. For me I will go back to PX4 because in my limited time I've been more successful with that on Pixracer. If I work out a reliable ArduPilot setup I will offer it to others for reference.
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