I have a GPS Lock issue.

I have a Pixhawk and 3DR GPS/Compass. Also have power module. I get almost instant GPS lock when I power the Pixhawk through USB cable. However, when I power off battery, I can't get a lock. The workaround I found is to first get a lock from USB, then plug in the battery...

Anyone else have this issue? Can anyone help point me in the right direction re: potential causes / fixes?

I tested pixhawk voltage out with a voltmeter and I get 4.8v from USB and 5.2v from battery. I put aluminum foil on the bottom the the 3DR Compass/GPS Module. GPS/Compass sits on a 6-inch mount.

MY SETUP:

  • Tarot 680pro
  • Multistar 4006-720KV
  • Turnigy Plush ESC (40a)
  • 3DR Compass / GPS
  • 3DR Telemetry
  • 5.8ghz Fatshark 600mw vTx
  • ***3 channel video switch *** (plugged into RC 10);
  • minimosd (3DR)
  • 2 4S 8000 Multistar Batteries in parallel
  • Feiyu Tech 3-axis Gimbal
  • GoPro

MY SETUP NOTES:

  • Running 3.3.1
  • ACC Calibrated
  • Compass Calibrated
  • Radio Calibrated
  • Compass Mot performed
  • Props and Motors on correctly
  • Autotune (Pitch/Roll)
  • ESCs calibrated, 1 ESC has the power wire which is plugged into the servo rail for back-up power. All others have ground and signal wires
  • ESCs mounted under the motors on the arms.
  • Rx mounted on the arm away from telemetry
  • I am powering the 3-channel video switch off the servo rail
  • I am powering the gimbal using a 12v BEC (split off before the power module)
  • I am powering the vTx off off a separate battery and running it through a LC filter (1A 3S)
  • I also made shielded cable for all of my FPV cables (vtx to osd, gopro to 3-channel switch, FPV camera to 3-channel switch)
  • low vibrations

Thanks for everyone's help.

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

Join diydrones

Email me when people reply –

Activity

DIY Robocars via Twitter
Oct 23
DIY Robocars via Twitter
RT @_JonMyer: 🏎 We need your help in naming my #AWS DeepRacer Underground Track 🏎 @davidfsmith's track is going to be referred to as 𝗔π—ͺ𝗦 𝗗…
Oct 22
DIY Robocars via Twitter
RT @gclue_akira: δ»•δΊ‹γ‚‚γŠγ‚γ£γŸγ—γ€ι›»θ„³εŒ–γ«γ¨γ‚‰γ„γ€€#γƒžγƒͺγ‚ͺγ‚«γƒΌγƒˆγƒγƒƒγ‚― https://t.co/4IU90hCLgm
Oct 22
DIY Robocars via Twitter
This is the hashtag to follow all the people in Japan who are hacking the new Nintendo Mario Kart with the real AR… https://twitter.com/i/web/status/1319281354664677376
Oct 22
DIY Robocars via Twitter
RT @gclue_akira: @chr1sa @diyrobocars jupyter mario https://t.co/P0oHdjlCRq
Oct 22
DIY Robocars via Twitter
RT @_JonMyer: 🚨Our 1st AWS DeepRacer Community Race is Underway on http://twitch.tv/aws 🚨 Join us to find out which member of your commu…
Oct 20
DIY Robocars via Twitter
Oct 19
DIY Robocars via Twitter
RT @BackyardRobotcs: After an admittedly long wait, the new Tinymovr R3.3 motor controller is now available https://tinymovr.com πŸ₯³
Oct 19
DIY Robocars via Twitter
RT @_JonMyer: 🏎 1 hr left before the #AWS #DeepRacer Community 🏎 Top 5 Race tomorrow LIVE on Twitch 1st Place = $50 Amazon GC or AWS Credit…
Oct 19
DIY Robocars via Twitter
Oct 16
DIY Robocars via Twitter
Oct 15
DIY Robocars via Twitter
Oct 14
DIY Robocars via Twitter
RT @davidfsmith: Race virtually with The AWS DeepRacer Community Race and then join us on the track to see how your times compare on the ph…
Oct 14
DIY Robocars via Twitter
Oct 14
Hiroki Tanaka liked Hiroki Tanaka's profile
Oct 13
DIY Robocars via Twitter
RT @breadcentric: It's now!
Oct 13
More…