search

miguelbalboa / rfid

Arduino RFID Library for MFRC522
The Unlicense
2.73k stars 1.42k forks source link

FIRMWARE ERROR #628

Closed ravnish1 closed 1 month ago

ravnish1 commented 2 months ago

Even after soldering it shows "Firmware Version: 0x0 = (unknown) WARNING: Communication failure, is the MFRC522 properly connected? Scan PICC to see UID, SAK, type, and data blocks..."

Rotzbua commented 1 month ago

Check your soldering joints.