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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@Ehsan: The main challenge concerning GPS/GNSS systems mounts on a racer is mostly not the GNSS itself, as long as no real cheapo, but the close distance to EMI impacts onto MAG and GNSS (motor field/power wires) and RF impacts (Camera,FPV Tx,Telemetry Tx, and, often reported, some Rx) .
Nevertheless, any recommendation for APM / Pixhawk will do for the Pixracer as well, no specific needs. For Groundplane and antenna size, a simple rule applies..The bigger,the better.
If you really like to use GPS modes, use a little Mast to get the GPS/Mag away from impact sources, play with copper foil for shielding and vary the antenna positions.
Great little GNSS are available at CSG like this one: http://www.csgshop.com/product.php?id_product=180 or this one (needs a MAG BOB as well) http://www.csgshop.com/product.php?id_product=171 or this one for bigger copters http://www.csgshop.com/product.php?id_product=180 . I used DroTek XL as well with above average results. http://www.drotek.com/shop/en/home/613-ublox-neo-m8n-gps-hmc5983-co... but the version with came with big 6mm taoglas patch.The recent one offers a EMI shield but a 3mm antenna and lacks former LNA / SAW design.
For my cheap Pixracer Robocat build, described here: http://www.rcgroups.com/forums/showpost.php?p=33812382&postcoun... , I used a HK GNSS, http://www.hobbyking.com/hobbyking/store/__86436__UBLOX_Micro_M8N_G... which obviously suffers from a smaller Groundplane and the close distance to all those forementioned impacts. So I have to re-do some part of the assembly , some shielding or install a mast. But well, for an RTH insurance its good enough as it is.
Thank you Gervais.
I am planning to use Pixhawk on a plane so distance is not an issue and I can put it far away from other components. Considering this, which of GPS units has high quality so I do not worry about high failure rate?
Thanks.
Me and others had very good experiences with the CSG units. But on a plane (w/o high impact risk) the HobbyKing will do as well. Keep the I²C wires (MAG) below 20cm .
Dang Randy thats totally awesome. I did another Racer sub 250g project using an APM mini, I had no idea this mini pix existed or I would have used that.
http://diydrones.com/group/arducopterusergroup/forum/topics/sub-250...
Yes, saw your discussion a moment ago. Looking good! The pixracer is very new and maybe the above quad won't be the last small quad you build? :-).
Thanks Randy, like always.
The PixRacer looks like its a 30.5 mm stack like the CC3D, if so I can just remove the APM and stack the Pix on top of my PDB when this is ready for everyone to use.
I am very excited about this form factor, as you know I have been pushing for a smaller Pix for several of my builds.
Pretty interested in this , i started flying cleanflight as i got sick of being limited to a 8bit board for the miniquads but now things have changed alot and i feel i can try apm once again for acro flying :) will be watching this closely. also does anyone have the weight of the FC and pdb/IV ?
Weight Pixracer - ( incl WiFi ) - app. 10.9g , Weight ACSP4 - 7.86g
So, if there are only 6 RCout pins then there are no relay pins to set or use?
So no way to turn lights on or off?
If you're using 4 motors, you have two spare analog pins to use for something... Switches, pan/tilt, etc.
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