What is the problem?
Is it possible to read a gpio-connected button state via the api?
What did you already try to solve it?
I read already the doc about api
Have you tried running in safe mode?
Did running in safe mode solve the problem?
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Additional information about your setup
I want to read from a server the state of a button / key connected to the rpi for additional input
if key is pressed, a new job should started on the printer by sending data over api
but i don't found any api possibility to realize this reading of key
Any idea?