Cube Blue support?

Pixhawk
1

Was the Cube Blue every supported in PX4? I know it is supposed to be exactly the same as a Cube Orange (not Orange+!) but it PX4 doesn’t seem to work that way.

Specifically, when I take an image compiled for Cube Orange, that works on Orange, it loads into the Blue but the baud rates on TELEM1 and TELEM2 are ~ 0.71 of the set baud rate. I.e. I can’t get TELEM1/2 to connect to a serial device, and when I look on the scope, 115kbd is actually ~82kbd.

If I try to stick an Orange+ image on the Blue it refuses.

When I try in Ardupilot, I get the same image working on Orange and Blue.

Note - this happens on multiple Blues I’ve tried, bought from multiple distributors.

Any ideas?

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Oh, that’s the first time I hear this. My assumption was that Orange and Blue are identical in terms of software that runs on them.

I assume these are Cube BlueH7, and not BlueF4.

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Blue H7. I ran into someone at Cube who said “well they’re almost the same” but didn’t have the details. Do you know if Blue H7 was ever officially supported in PX4?

4

Found the solution.

You have to rebuild the bootloader under PX4, you can’t use the bootloader shipped on the Blue H7.

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[Sponsored by CubePilot] stm32h7: Reset USART clock selection by julianoes · Pull Request #23498 · PX4/PX4-Autopilot

There was actually an issue about this last year. That’s what we get for staying on an older version.

1 Like
6

Nice find! That makes sense.

So far anyone reading this later: the PX4 version needs to be recent enough to include the fix you mentioned above, or otherwise you need to switch to the PX4 bootloader (see Bootloader Update | PX4 Guide (main)).

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