I’ve encountered an odd connection issue between QGroundControl and the WaterLinked G2 GPS system, and I wanted to pose the situation here. Background: we’ve been running our ROV with a Locator-U1 (the wireless one) for some time, with communication between the topside GPS hub and our ROV laptop facilitated by an Ethernet cable and a network bridge (and we access the GPS GUI via wifi). This all worked fairly well, and we indeed get GPS coordinates that populate our ROV telemetry file. BUT, we experienced numerous instances of communication within the GPS seeming to drop out entirely, such that within the GPS GUI we see a message reading: “No connection to Underwater GPS topside. Please check network connection and power”. As far as we can tell, there was no disruption to the Ethernet cable, network bridge, or the wifi enabling connection to the GUI. Correcting this error required shutting down and restarting the entire system, sometimes including the laptop itself.
In an effort to remedy this situation, we decided to obtain and incorporate the BlueROV2 Integration Kit, enabling hardwired communication between the GPS topside unit and QGroundControl. I was a little unsure about incorporating the Integration Kit as it primarily includes instructions for the Locator-A1 and Locator-D1 – both of which are Locators with cables that are integrated into the BlueROV2 – but we proceeded anyways (using our wireless Locator-U1).
Once we tested the ROV and GPS, we observed multiple instances where the ROV’s camera feed would drop out entirely. The ROV connection could be restored by removing the new BlueROV2 Integration Kit cable that plugs into the newly installed port in the FXTI box. If we plug that cable back in to the FXTI box, the ROV feed holds for a few minutes before dropping out. Also note that we did not see the ROV icon on the QGroundControl map, nor did GPS coordinates populate the ROV telemetry file. So, something is clearly off with how we’ve structured the GPS - ROV communication. (though, note that all other aspects of the GPS system appeared to be working normally, as we saw positioning information on the GPS GUI).
Please note that per the BlueROV2 Integration Kit instructions, the topside GPS hub was set to IP 192.168.2.94, and the topside computer was set to 192.168.2.1
I have three (main) questions:
(1) Does anyone know what may have caused the original loss of communication described in the first paragraph?
(2) Is it appropriate to use the BlueROV2 Integration Kit with the Locator-U1?
(3) Based on my descriptions, does anyone have any recommendations for troubleshooting the communication issues between QGroundControl and the GPS system that manifested once we incorporated the Integration Kit?
Note that I also created a WaterLinked help ticket (and am awaiting a response), and I also wanted to see if this community had any insight.
Thank you very much!