No devices listed in SLCan mode

[dlech]

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Issue details

Trying to connect in SLCan mode to upgrade Here 3 GPS firmware. I've done this before, so I'm not sure why it is no longer working. The only difference is that I have updated MissionPlanner. After enabling SLCan, nothing pops up in the list. In the past, I was able to fix the issue by restarting both the flight controller and MissionPlanner. But now I can't get it to ever work.

Version

Platform

[ ] All [ ] AntennaTracker [ x ] Copter [ ] Plane [ ] Rover [ ] Sub

Airframe type

What type of airframe (flying wing, glider, hex, Y6, octa etc)

Hardware type

Cube Orange

Logs

Here is the .can log. How do you decode this?

2021-10-11 17-31-10.zip

[meee1]

double check the CPORT is set correctly for the port you have it connected too

[meee1]

ok question, how did you get that .CAN log?

there appears to be a mix of mavlink and can traffic in the same file, this is not normal

[meee1]

CAN traffic looks like this T0001557F88E000000000000DF T0001557F88E000000000000DF

whereas that logfile has alot of binary data that should not be there. i would guess either a AP issue, or some bad config issue

[dlech]

ok question, how did you get that .CAN log?

I just checked the log box on the UAVCAN page.

[dlech]

double check the CPORT is set correctly for the port you have it connected too

I tried both CAN1 and CAN2 both on the AP and in the software.

[dlech]

whereas that logfile has alot of binary data that should not be there. i would guess either a AP issue, or some bad config issue

Where would I check for bad config?

[dlech]

I tried deleting the Documents\Mission Planner folder (where config.xml is) and reinstalled Mission Planner, but no change. Still get corrupted logs.

[dlech]

I finally got it to connect by not connecting MAVLINK first.

• If you have been to the UAVCAN screen already, restart Mission Planner, otherwise it is in a bad state and won't be able to connect
• Go to the UAVCAN screen
• Select the SLCan com port at the top-right of the screen
• Click the SCCan Mode CAN1 button
• It gives an error message about not being connected and to make the SLCan COM port is selected
• Click OK
• It connects and lists the Here 3 GPS

[meee1]

agh ok, you never mention what hardware you are using, but if its a cube orange, never connect to mavlink ,and go direct using the slcan serial port. sounds like a bug in the CAN over the mavlink port bug, so an ardupilot issue

[dlech]

FWIW, I did mention it 😉

Hardware type

Cube Orange

[meee1]

must have missed that :)

[dlech]

No worries, I do that too.

[phamelin]

@dlech Thanks for the workaround!

[davidbuzz]

@tridge ... is this an ardupilot bug like @meee1 suggested it might be?