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    Best posts made by ROBERT JUDD

    • Starling 2 Max no GPS data

      ModalAI Support,

      I received a new Starling 2 Max a few days ago, and overall it's great, but I'm having a problem with GPS. Basically, the drone appears to NEVER receive any GPS signals even when left outside for long periods of time. My system info and results of px4-listener are pasted below.

      This issue appears similar to these other forum discussions, where they seem to think the problem relates to EMI:

      https://forum.modalai.com/topic/3879/gps-not-working-for-starling-2-max/16

      https://forum.modalai.com/topic/3912/problem-acquiring-gps-satellites-possible-voxl2-board-emi?_=1731073406011

      I did unplug the Lepton 8-pin JST SH connector as suggested by James Strawson in the forum discussions above, but that had no effect. I also powered down the WiFI as suggested by Alex Kushleyev, but this also had no effect, although kind of a bad test for me because I couldn't put the drone outside due to USB cable length:

      • pin GPIO_157 controls VBUS, which is USB power on VOXL2
      • to disable, run voxl-gpio write 157 0
      • to enable, run voxl-gpio write 157 1

      What do you think I should do next? Is there some way to turn the power off to various subsystems via software in an attempt to figure out if and where EMI is the problem? Any other ideas?

      Thanks for your help !

      Starling 2 Max Outdoor GPS-denied Development Drone × 1
      with Battery Pack and Controller and Case
      Dual 4k & Dual Tracking & ToF (C29)
      5G WiFi and Ghost Atto 2.4GHz
      ECCN: EAR99, NLR


      system-image: 1.8.02-M0054-14.1a-perf
      kernel: #1 SMP PREEMPT Mon Nov 11 22:47:44 UTC 2024 4.19.125
      hw platform: M0054
      mach.var: 1.0.1
      voxl-suite: 1.4.1
      current IP: wlan0: 10.0.0.19


      voxl2:~$ px4-listener sensor_gps

      TOPIC: sensor_gps
      sensor_gps
      timestamp: 841732144 (0.020669 seconds ago)
      timestamp_sample: 0
      time_utc_usec: 0
      device_id: 11272245 (Type: 0xAC, SERIAL:6 (0x00))
      lat: 0
      lon: 0
      alt: -17000

      alt_ellipsoid: 0
      s_variance_m_s: 999.00006
      c_variance_rad: 3.14159
      eph: 4294967.50000
      epv: 3796926.25000
      hdop: 99.99000
      vdop: 99.99000
      noise_per_ms: 64
      jamming_indicator: 15
      vel_m_s: 0.00000
      vel_n_m_s: 0.00000
      vel_e_m_s: 0.00000
      vel_d_m_s: 0.00000
      cog_rad: 0.00000
      timestamp_time_relative: 0
      heading: nan
      heading_offset: 0.00000
      heading_accuracy: 0.00000
      rtcm_injection_rate: 0.00000
      automatic_gain_control: 0
      fix_type: 0
      jamming_state: 0
      spoofing_state: 1
      vel_ned_valid: False
      satellites_used: 0
      selected_rtcm_instance: 0

      voxl2:~$ px4-listener sensor_mag

      TOPIC: sensor_mag
      sensor_mag
      timestamp: 861420482 (0.006257 seconds ago)
      timestamp_sample: 861420007 (475 us before timestamp)
      device_id: 527625 (Type: 0x08, I2C:1 (0x0D))
      x: -0.04417
      y: -0.32142
      z: 0.42167
      temperature: nan
      error_count: 0
      voxl2:~$

      posted in Ask your questions right here!
      ROBERT JUDDR
      ROBERT JUDD