Endless 'probing for SBF' messages

ArduCopter Copter 4.6
1

I am trying to setup a holybro Mosaic-H on a Cubepilot Orange+, but I am not having any joy!

I followed the instructions on this setup page, but the main LED is not coming on, and mission planner is pushing an endless stream of ‘probing for SBF at xxxx baud’ and cycling through all the available baudrates. It’s also showing 'Unhealthy GPS signal in the HUD, but I’m getting ‘No Fix’ instead of ‘No GPS’ so I presume the GPS is communicating somehow…

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I have collected a disarmed log:

I also downgraded back to 4.5.7 and didn’t have any joy with this setup either… Although the error was slightly different in that it said ‘detected SBF at xxxx baud’ instead of ‘probing’.

Any help appreciated, looking forward to testing 4.6.0

2

After rebooting and trying a couple more times it managed to detect the GPS… I will try and take it to a better location to get a fix and report back.

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3

So:

I initially was connected to GPS2 port on the cube, and I had no joy.

The success above was after switching to TELEM2 port and setting SERIAL2_PROTOCOL to GPS. This worked almost right away…

Solved for now, but I’ll try switch back to GPS2 and try this again to see if its a port issue.

4

When using GPS2 input you need to use SERIAL4_PROTOCOL=GPS.
If you do not use the GPS1 input then set SERIAL3_PROTOCOL=-1

5

I have set this already

This didn’t resolve the problem. When connecting to GPS2, it still spams the message dialog with the same messsages. Plugging back into TELEM2 it starts working fine again.

6

You need to set SERIAL2_PROTOCOL=-1 as well
And configure GPS1 although it is connected to GPS2 input, assuming you only have one GPS receiver connected to GPS2 input.

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