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Hi , I have a strange behavior of my system using a Zero2Go rev2.
The System is based on the dietPi distribution (to run MuPiBox, a Kids Audio player)
I found that when the system boots up, it shuts down right after booting.
What I found is that when the daemon.sh toggles the SYSTEM_UP line it initiates a shutdown of the system. Like as pressing the button.
BUT I commented out the shutdown statement in daemon.sh
I also modified the Zero2Go to use different GPIO which works fine with a standard Raspi Linux, but not with my diet Pi distro.
So it looks like for some reason toggling SYSTEM_UP also affects the BUTTON / SWITCH line or is causing a shortcut or something that shuts down the Raps.
Maybe because the GPIO for BUTTON / SWITCH gets used by something else and gets toggled?
I am running out of ideas.
If anybody has an idea, I would be happy for any hints or suggestions.
Thanks,
Christian
Posted : 02/06/2023 10:26 pm
This most probably is due to GPIO conflicting.
Is there any connected hardware that may also use GPIO17 and/or GPIO-4?
Please show us your wiring, and also how you modified your Zero2GO. The "zero2go.log" file may also have some useful information.
Posted : 03/06/2023 10:19 am
Topic starter
@admin
Thanks! I cut the traces to GPIO 4 and GPIO 17 and added wires so I can connect the signals to any other pin.
Nothing else is connected to the Pi, except the zero2go.
But I am using dietPi distribution.
My guess is that the GPIO lines behave differently. Maybe something causes all lines to change when the SYSUP is toggled by zero2go?
But I do not have a scope to test that right now.
Christian
Posted : 03/06/2023 9:37 pm
I made quick search of "MuPiBox" and found this page. It seems MuPiBox suggest to use OnOff Shim, which uses GPIO-4 and GPIO-17 as well.
Although you don't use the OnOff Shim hardware, you may have installed the software suggested by MuPiBox, which may include the software for OnOff Shim. I think that most probably is the reason to cause IO conflicting.
Posted : 05/06/2023 12:27 pm
Topic starter
Yes, the OnOff Shim is used by that software (MuPiBox) but I wanted to replace it with the zero2go (because of more flexible input voltages).
But the same problem persists if I only use the underlying dietPi Linux distribution that is not using the OnOffShim.
I also changed the GIO 4 and GPIO 17 from the zero2go to other GPIO (soldering and changing daemon.sh)but it shows the same problem.
Somehow the GPIO for the Switch Signal gets toggled if I change the System Up Signal
Thanks,
Christian
Posted : 05/06/2023 8:32 pm
Don't know if the MuPiBox software automatically installed the software for OnOff Shim. If it did, please make sure to uninstall the software for OnOff Shim. Otherwise I have no clue then.
Posted : 06/06/2023 1:30 pm