don't know if it's the right place to pull my question
my Arduino ide software serial monitor is showing like firmware version : 0x0 = unknown WARNING :Communication failure, is the mfrc522 properly connected ? scan picc to see uid, sak, type, and data blocks.... can you help me .
The problem is more likely to be with the way the module is connected to the rest of the circuit. I'm also not sure whether the serial monitor is of any use if you are using SPI connections. Please show the rest of the schematic.