GPS Issues w/ VOXL 2 PX4 (M8N and Here+)
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We have been having trouble getting the M8N GPS module working on the VOXL 2. I tried the fixes suggested here https://forum.modalai.com/topic/2201/gps-not-ok-with-voxl2-px4, no dice. The LED on the M8N module lights up, but does not get a GPS-lock and there is no heading.
On the other hand, we were able to get a Here+ GPS module somewhat working (https://ardupilot.org/copter/docs/common-here-plus-gps.html). We were able to get a GPS-lock. However, the magnetometer readings were not coming though on the VOXL 2. We modified the connector so that the GPS (lat, lon, alt, etc) could connect to the VOXL 2 in the usual way, and used the additional two cables to connect the magnetometer to a Pixhawk which receives magnetometer readings (so we know the Here+ mag is not faulty).
Looking for suggestions about how to get the M8N module working and advice on how to get magnetometer readings to come through on the VOXL 2 using the Here+ module!
Thanks!
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@majjam Are you using SDK 1.0.0? Is this a Sentinel drone from ModalAI or a custom drone?
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@Eric-Katzfey We are not using SDK 1.0.0 on account of the M0065 support (https://forum.modalai.com/topic/2429/voxl2-io-m0065-support-on-px4-1-14-in-sdk-1-0-0/2?_=1690933572791), we will in the future when the feature is available. We are using a custom drone.
Thanks!
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@majjam Okay, so I'm guessing that you are using 0.9.5 then? The only known issue with those Holybro GPS units was the baudrate thing. Some units are not set at 115200 so the command to start the gps with that baudrate will fail on units with a different baudrate setting. Changing the start line to remove the forced 115200 and let the driver choose the correct baudrate on it's own was the resolution of that issue. Beyond that we are not aware of any other issues. Can you verify that the M8N unit is working on another platform? Can you use an oscilloscope on the M8N UART TX line and see any activity?
