Question 1: I would like to consider the Pixhawk for flying a small quad, but without compass or GPS. I know they are offering it for sale without those modules, and I understand I don't get any nav features. What I want is IMU stabilization mode, manual mode, and a failsafe mode to center sticks. I may add GPS later, but I just want to start out with basic flying capability and not have the firmware freak out because of missing data.

Question 2: I would like to use the Spektrum PPM input, but I see only one connection for that. I would like to use multiple Spektrum satellites in order to get some antenna orientation diversity. Any way to do that? Any disadvantage of using a regular Spektrum receiver such as AR8000, and plugging all the signals separately as PWM?

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • I do use the PPM Encoder btw
  • I have an AR 8000 with two satellites. One plugs into the Hawk the other is connected to the AR 8000 in standard fashion and I've had no problems.
  • On your question 1, I should think you would be able to fly without a compass and GPS just fine.  As you say, you will just be missing all the nav functions.  I haven't done it with Pixhawk, but I have flown a quad on PX4 without them.  I've also done plenty of flying with APM with a non-functional GPS or Compass.  Stab works just fine.

    The only thing would be if you are doing high-speed flying, banking and turning, without the GPS feedback into the AHRS solution, sometimes the angles go off a little bit.  It's fairly minor, and if you just don't fly like that, it's fine.

    • How well does Stab work without a Compass? Will the yaw angle drift quickly?

      • I never ended up doing this without the compass and mag. I ended up getting the whole kit.

        However in STAB mode it does not use the GPS and mag, only the IMU, and it is fine. I maintains it's yaw, pitch, and roll very well. Maintaining altitude though is not very good due to pilot skills. I suppose I should use ALT HOLD mode more...

This reply was deleted.

Activity

DIY Robocars via Twitter
May 15
DIY Robocars via Twitter
May 14
DIY Robocars via Twitter
May 13
DIY Robocars via Twitter
RT @f1tenth: Say hi to our newest #F1TENTH creation for @ieee_ras_icra next week in Philly. It’s going to be huge! 😎 🔥 @AutowareFdn @PennEn…
May 13
DIY Robocars via Twitter
May 11
DIY Robocars via Twitter
May 8
DIY Robocars via Twitter
RT @SmallpixelCar: Noticed my car zigzagged in last run. It turned out to be the grass stuck in the wheel and made the odometry less accura…
May 8
DIY Robocars via Twitter
RT @SmallpixelCar: Test my car. RTK GPS worked great. Thanks @emlid for their support. https://t.co/EkQ6qmjmWR
May 8
DIY Drones via Twitter
RT @chr1sa: @kane That's @diydrones circa 2009. Still have a box of those Canon cameras that we used to strap into planes, just like this.…
May 3
DIY Robocars via Twitter
RT @chr1sa: Our next @diyrobocars race is going to be outside at a real RC racetrack in Fremont on May 28. Fully autonomous racing, head-to…
Apr 30
DIY Robocars via Twitter
RT @f1tenth: Our Spring 2022 F1TENTH course @PennEngineers is coming to an end with a head-to-head race as a big finale. So proud of our st…
Apr 26
DIY Robocars via Twitter
RT @DanielChiaJH: I wrote a thing! Throughout the development of my @diyrobocars car I've been using @foxglovedev Studio to visualize and d…
Apr 23
DIY Robocars via Twitter
RT @SmallpixelCar: My new car for high speed. Low body, everything ( @NVIDIAEmbedded Jetson Xavier NX, @emlid RTK GPS, IMC) under the deck…
Apr 23
DIY Robocars via Twitter
Apr 21
DIY Robocars via Twitter
RT @f1tenth: F1TENTH Race training setup @PennEngineers for our upcoming ICRA2022 @ieee_ras_icra competition. @OpenRoboticsOrg @IndyAChalle…
Apr 21
DIY Robocars via Twitter
RT @fatcatFABLAB: Proud to be hosting a restarted DIY Robocars NYC Meetup April 26. Come by if you want to talk about and race self-driving…
Apr 17
More…