GPS never published
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A while ago I posted about having a lower number of satellites in one of my sentinels (7-13) compared to my other one (20). Today the latter sentinel's GPS stopped working. I have clicked through a few forums and tried some qshell commands to no avail. I saw some other posts about the diagnostic work differing with the addition of a 5G modem, which I have. What should I do?
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A while ago I posted about having a lower number of satellites in one of my sentinels (7-13) compared to my other one (20). Today the latter sentinel's GPS stopped working. I have clicked through a few forums and tried some qshell commands to no avail. I saw some other posts about the diagnostic work differing with the addition of a 5G modem, which I have. What should I do?
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@groupo From the description it's hard to tell if the GPS stopped communicating or stopped getting a usable solution. L1 GPS is very easily degraded by RF interference from high speed signals on wires or communications devices. Look at the
jamming_indicatorfield in thesensor_gpsuorb to get a better sense of if you have a RF interference issue. Value much above 40 indicate too much interference. Grounding and shielding the wires from the voxl2 to the GPS can improve this.There is a bit more confusion in that px4 health checks by default need > 7 satellites in use to say system has GPS (==> GPS working but not good enough), or EKF2 can reject good GPS and report
no global positionin situations where vibration or magnetic interference is the underlying problem.I'd recommend sharing more details from the
sensor_gpsoutput or a ulg file so folk can help further. -
@groupo From the description it's hard to tell if the GPS stopped communicating or stopped getting a usable solution. L1 GPS is very easily degraded by RF interference from high speed signals on wires or communications devices. Look at the
jamming_indicatorfield in thesensor_gpsuorb to get a better sense of if you have a RF interference issue. Value much above 40 indicate too much interference. Grounding and shielding the wires from the voxl2 to the GPS can improve this.There is a bit more confusion in that px4 health checks by default need > 7 satellites in use to say system has GPS (==> GPS working but not good enough), or EKF2 can reject good GPS and report
no global positionin situations where vibration or magnetic interference is the underlying problem.I'd recommend sharing more details from the
sensor_gpsoutput or a ulg file so folk can help further.@ben-grocholsky Thanks Ben! Yes, having a look at some log files would definitely help in troubleshooting.
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@ben-grocholsky Thanks Ben! Yes, having a look at some log files would definitely help in troubleshooting.
Thank you @ben-grocholsky! I should be more clear, when I ran
px4-listener sensor_gpsI received something along the lines of "GPS never published". I just went to go get the verbatim output but everything seems to be working. I do indeed see the uorb now. Puzzling
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