Problems with running programs on Technic hubs

[Flippoel]

Hi,
Yesterday we programmed the whole day on 4 technic hubs whom are working together with a spike prime hub as a selfmade-remote. Everything was working fine, after that we started programming another technic hub with a controller. When we want to try that, all technic hubs aren't able to run there program, only the Spike prime is still running, but all the technic hubs shut down after trying to start there program.
We already restarted the power for the hub, we even rebooted the computer.
It's quit annoying because, you don't get any error message, so we can't figure out what's the problem.

Below the firmware information, also attached the programs.

I tested the simple program with the light, but that only runs for a few seconds and then the hub turns off. https://youtu.be/BhW4ZWbetEo

Hopefully one of you can help us.
Thanks!

Hub SB Achter
Pybricks MicroPython v1.20.0-23-g6c633a8dd on 2024-04-11; LEGO Technic Hub with STM32L431RC
Type "help()" for more information.

Hub BB Achter
Pybricks MicroPython v1.20.0-23-g6c633a8dd on 2024-04-11; LEGO Technic Hub with STM32L431RC
Type "help()" for more information.

Hub SB voor
Pybricks MicroPython v1.20.0-23-g6c633a8dd on 2024-04-11; LEGO Technic Hub with STM32L431RC
Type "help()" for more information.

Hub BB voor
Pybricks MicroPython v1.20.0-23-g6c633a8dd on 2024-04-11; LEGO Technic Hub with STM32L431RC
Type "help()" for more information.

Hub Kraan
Pybricks MicroPython v1.20.0-23-g6c633a8dd on 2024-04-11; LEGO Technic Hub with STM32L431RC
Type "help()" for more information.

Hub GB SB Achter
Pybricks MicroPython v1.20.0-23-g6c633a8dd on 2024-04-11; LEGO Technic Hub with STM32L431RC
Type "help()" for more information.

Spauwer main (selfmade remote)
Pybricks MicroPython v1.20.0-23-g6c633a8dd on 2024-04-11; SPIKE Prime Hub with STM32F413VG
Type "help()" for more information.

current programs.zip

[Flippoel]

Additional note, it seems when I run the 'easy' program and I disconnect the hub from the computer and try to connect another hub, it shuts down both hubs. (the one who is running the program as well as the one who I try to connect to the computer)

[Flippoel]

Hi again,
First one strange thing, after the test I just did one should expect to the 3-light program to be on the hub, but when I start hub 1, and then press the second time to start the program it directly turned off.

We did the test again, the first time they went off 1. on connect to hub3, the next time they went off on connect to hub 2.
So it's not exactly unambiguous

[BertLindeman]

Really puzzling.

I do not know of communication between the hubs with a program as simple as this 3 lights program.
For sure not a signal like "let us all stop".

[dlech]

Just to make sure I'm understanding correctly, all hubs are running this simple program and there is not broadcast/observe going on and no remote controls connected.

Then all of the hubs that are running this simple program turn themselves off when you try to connect an additional hub to your computer.

If that is the case, I suspect this is a Bluetooth issue. The computer is probably sending some unexpected Bluetooth request to the other hubs that we aren't handling which crashes the hub. To find out what that is, can you please log the Bluetooth packets on your computer and share them with us?

Instructions on how to do that: https://bleak.readthedocs.io/en/latest/troubleshooting.html#capture-bluetooth-traffic

[Flippoel]

Hi David, thanks for your reply.
Your first question is yes, it was only running the program with changing the lights and no Bluetooth communication at all.

We tried first the simple option, turning of the computer and then running the programs. And that worked, so your suggestion seems to be right. One note with this test, when we started the programs we expected the 'simple lights program' but that was not the case, the 'old' programs from yesterday were running, so the 'simple lights program' was not saved in the hubs.

After this we turned on the computer and update one program because it was not working properly, and we were able to do that without problems.

One question, can a different computer which is also working in Pybricks causing these problems?

As for your suggestion to make a Bluetooth log, we wait for that until the problems will appear again.
Thanks for your help so far, it seems we are out of trouble now.

[dlech]

I don't think a different computer could cause the hub crashing problem. I think it would only happen if more than one hub was connected to the same computer. My theory is that the Bluetooth adapter is sending some sort of low-level configuration request to readjust things when two devices are connected.