OnOff Shim does not switch my RPi 3+ off

@Hans wrote:

Hi friends,

i am building a musicplayer (jukebox4kids).
Everything works really fine except the shutdown / Switch off.
i have connected the “OnOffShim” to my RPI3+.
PIN07 to GPIO04
PIN11 to GPIO17
The button is connected to the “OnOffShim”
I am pressing the button for longer >2 sec (like written in “cleanshutd.conf”)
The RPI starts to shutdown (network switch off, music switches off)
But it does not 100% switches off
The RPI idles in a state, where the red LED is active an some GPIOs are controlled (i am also using an “oled display” an this stays on).

In this state the pressing the button does not bring any system reaction …i need the voltage reset and the RPi starts again.

I have checked the voltage signals at the PINs from the OnOffShimBoard
PIN11:
Pressing the button = > PIN11 / GPIO17 is 0V
Releasing the button = > PIN11 / GPIO17 is 3,2V

PIN07:
Pressing the button = > PIN07 / GPIO04 is 3,2V
Releasing the button = > PIN07 / GPIO04 is 3,2V
In the moment where the RPI switches also the speakers (USB…because i am using an external USB SoundCard) off (i hear a quitly “clack”) the voltage from the PIN07 / GPIO04 drops to zero and after (about half a second) back to 3,2V
Where is stays…

Can please somebody help me?
What can i do to debugg this problem?
May be OnOffShim does have an error

Thanks a lot for your help
Regards

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