Missing/ empty/ extra ESC telemetry log data

[MarbleJames]

Bug report

Issue details
I have a Quadplane with 5 esc’s connected. Since updating from 4.4.4, extra empty ESC’s (up to 8 in total) have been appearing in logs and the cruise ESC data is often empty.

On occasion data for 5 esc's has been observed in mission planner but only data for 4 has been logged.

Just verified to be a firmware issue as follows;

Flashed back to 4.4.4 - 5 esc’s correct data
Flashed 4.6.0 - 8 esc’s 4 with data 4 without
Flashed to 4.4.4 - 5 esc’s correct again.
I haven’t tried all the firmware releases in-between but 4.5.4 and 4.5.0 have also been shown to not work.

(https://discuss.ardupilot.org/t/esc-telemetry-phantom-escs/127106)

Version
Post 4.4.4

Platform
[ ] All
[ ] AntennaTracker
[ ] Copter
[ X ] Plane
[ ] Rover
[ ] Submarine

Airframe type
4+1 quadplane

Hardware type
Cube orange plus bdshot, 4x apd80, 1x apd120

Logs
Two logs included, both same params one 4.4.4 and one 4.6.0
ESC telem logs.zip
https://drive.google.com/drive/folders/17_GhgOKQxd0-tNSXUfivTVYeqpDNg5mY?usp=sharing

[andyp1per]

This is a change in 4.5 to support dshot on IOMCU. ESC numbers are now aligned with servo numbers.

[MarbleJames]

This is a change in 4.5 to support dshot on IOMCU. ESC numbers are now aligned with servo numbers.

Thanks for the reply, I don’t understand how that affects this though, as far as I understand IOMCU is only the first 8 channels of cube orange? I’m running esc’s on 9-13. Anywhere i can read more on this.

I can deal with empty ESC’s in logs but surely this shouldn’t stop recording the telem stream for the cruise ESC? (especially when i'm getting live telemetry for the 5th in mission planner)

v4.4.4
RC9 - ESC[0]
RC10 - ESC[1]
RC11 - ESC[2]
RC12 - ESC[3]
RC13 - ESC[4]

v4.6.0
RC9 - ESC[1]
RC10 - ESC[2]
RC11 - ESC[3]
RC12 - ESC[4]
RC13 - No telem
? ESC[8]
? ESC[9]
? ESC[10]
? ESC[11]

[andyp1per]

It should be:

v4.6.0
RC9 - ESC[8]
RC10 - ESC[9]
RC11 - ESC[10]
RC12 - ESC[11]

You shouldn't be getting logging from ESC[0]-ESC[3] if you are not using RC1-4

[andyp1per]

There may be a logging issue here with S1-S8 if they are not being used

[MarbleJames]

There may be a logging issue here with S1-S8 if they are not being used

Just to be clear, RC1-8 are being used for normal PWM servo outputs - so yes shouldn't be producing ESC telem data

[rmackay9]

I've added this to the 4.6 issues list although it sounds like the issue is in 4.5 as well which means it's not a blocker for the release (but it would probably still be good to resolve if we can)

[andyp1per]

I actually can't reproduce this with your setting. I found a bug - #28833 but I think EDTv2 is only is 4.6 so don't think that can be your issue. Also CubeOrange doesn't support bdshot, so there can by no telemetry coming from IOMCU. So I am rather at a loss to say what is going on here. I correctly get a log with telemetry on 9-12 only.

[andyp1per]

If you are able to reproduce this on a cut down config that would help me narrow down.

[MarbleJames]

Ok made a simple setup, to test. 4x apd f80 connected to 9-12 and one f120 to rc13, telemetry connected to serial 3 -nothing else connected. Using a cube orange plus on airbot mini carrier - i thought bshot was supported if running bdshot fw (which i am)?

Getting the same behaviour (logs in the drive link above).
4.4.4 - ESC[0],[1],[2],[3],[4] populated
4.6.0 - only logging 4 ESC's again as shown in photo but seeing 5 in mission planner

[andyp1per]

i thought bshot was supported if running bdshot fw

Sorry, yes - just not supported on the main channels - only aux

[andyp1per]

Ok made a simple setup, to test. 4x apd f80 connected to 9-12 and one f120 to rc13, telemetry connected to serial 3 -nothing else connected. Using a cube orange plus on airbot mini carrier - i thought bshot was supported if running bdshot fw (which i am)?

Getting the same behaviour (logs in the drive link above). 4.4.4 - ESC[0],[1],[2],[3],[4] populated 4.6.0 - only logging 4 ESC's again as shown in photo but seeing 5 in mission planne

Can you post your parameters for the test? How did you test?

[MarbleJames]

Params for both FW's in the drive link, couple of small differences when comparing (nothing to do with dshot/serial etc) presumably just fw version related.
Testing I'm just checking I'm getting telem from all the esc's in mission planner then enabling log disarmed, for a while, disable and then download logs. I Get the same behaviour in flight etc this just keeps the files a bit smaller.