Thanks for all, how can i erase one post?
with just posting your code you burden a lot of work on the shoulders of your potential helpers. You should add english comments to parts of your code that are non-english You should describe what you see in the serial-monitor and how the result deviates from what you expect. And you should post the serial-output into a code-section.
Did you write this code from scratch? What did you use as the source to find out how to code it? Or did you use some demo-code ? Post a link to the demo-code.
How about using a demo-code that is known for working?
What kind of pre-tests did you do?
was a reading test if an RFID successfull?
best regards Stefan
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