Use interrupts instead of hot idling

[danielbuechele]

Currently, when waiting for a tag, the task is put to sleep for 100ms and then activated again. The MFRC522 module has a IRQ pin and we could use an interrupt when the tag is present.

[abobija]

Hi @danielbuechele

Thank you for the comment. I recall from past research that implementing interrupt-driven tag detection with the MFRC522 can be challenging due to certain limitations, so I initially opted for polling. I will revisit the details to assess if there's a viable way to integrate interrupt handling in the current setup.