RC522 RFID Reader Module Serial 13.56 MHz Light dependent resistor and you can even connect

and you can even connect multiple ones to the same pin

so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad

Wide operating temperature range: –40°C to +85°C

Long distance detection range:15m

RC522 RFID Reader Module Serial 13.56 MHz Light dependent resistor and you can even connectFeatures: MF RC522 is applied to 13. 56 MHz contactless card reader chip of a family member of high level of integration., For "Three Tables" application has introduced a low voltage, low cost, small size and non Contact chip card reader is a good choice for smart meters and hand held portable devices developed. MF RC522 using advanced modulation and demodulation concept fully integrated in all types of passive methods 13. 56 MHz contactless