Does anyone know how to set this up to signal a car is present?
@stefano_gunella Saw your post and the (unhelpful) replies. Did you ever solve this?
there is this example in the library ➜ rfid/examples/MinimalInterrupt/MinimalInterrupt.ino at d5dba131e623e6416b8a5584c31758216c92ae03 · miguelbalboa/rfid · GitHub
The MFRC522 does not cause interruption due to the detection of a nearby card.
And although it may seem like a useless answer to you, it is for this simple reason that no one could do it.
After monitoring the IRQ line and reading the spec - I was coming to the same conclusion.
Now, I'm just trying to work out why these boards stop detecting cards..?
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