Reach M+ sudden disconnection while driving

Reach Module / M+ / M2 Hardware integration
1

Dear community,

I purchased a Reach M+ few months ago and integrated it with Pixhawk 1 to navigate a rover along a grid of waypoints. The electronic connection is shown in the image below:

5f44ee31f734477db9f11c9a2e89cf0d6debd439
5f44ee31f734477db9f11c9a2e89cf0d6debd4391282×965 169 KB

Apart from Reach M+, I also used another GPS+compass component since an external compass is required and there is no integrated compass in Reach M+.

I used the NTRIP configuration for RTK navigation. The laptop with Internet connection receives the correction signal from NTRIP station via Mission Planner, and then transmit the correction signal to Reach M+ through RFD900 telemetry units.

At the beginning of driving, the RTK connection can be achieved. But after driving along a few waypoints, the GPS signal from Reach M+ was suddenly lost (three indication lights were still solid) and only the GPS+Compass unit was still functioning. When the signal from Reach M+ is lost, RTK status also disappeared on Mission Planner.

This is the link of the dataflash files for Mission Planner:
https://drive.google.com/open?id=1HjVBp0gph3UQcIx0sZmTMO-SDPBmu-Sp

By reading the dataflash file, I noticed the second GPS statues(Reach M+) suddenly drops while the vehicle was driving.

Can anyone help with solving this issue ?

Best regards,
Mirko

3

Hi Mirko,

May I ask you to share raw data logs from your Reach M+ device?

5

Hi Tatiana,

I have uploaded the data logs and full system report here:
https://drive.google.com/open?id=1-6yDkUKGBB7TXTGfqY3WYB4-GkM9gFyZ

Thank you so much for your help. I really suspect it’s a hardware problem.
Sometimes the Reach M+ cannot even start properly when I plug it with power (only orange light appear). This happens occasionally and will be fixed after refreshing the firmware, but still cannot solve this problem permanently.

6

Hi Mirko,

This is just an indication that there’s a lack of power for Reach. I’d recommend powering Reach from a power bank to see if the issue persists.

It’s very likely that Reach disconnects because of the reboot caused by the incorrect power supply.

7

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