Hi @ all,
I have a SPI problem.
I have an ARDUINO MEGA 2560.
On the ICSP ( in the middle of the board ) is a SD-CARD Reader connected On Pin 50-53 is a RC522 ( RFID ) connected.
The Card Reader is working without any problem, but not the RC522. He's doing nothing.
Even if I load the sample sketch for the RC522 ( CardReader is still connected on hardware side, but not inside the program ), the RC522 is doing nothing.
Any idea why ?