This RFID module uses the most common contactless reading and writing card chip RC522. The bottom layer adopts I2C protocol timing, which can be applied to campus all-in-one card, water card recharge consumption, bus card recharge consumption design, access control card, etc. The contact IC card and the reader use radio waves to complete the reading and writing operations. The communication frequency between the two is 13.56MHZ. When the reader performs read and write operations on the card, the signal emitted by the reader is composed of two parts superimposed: one is the power signal, which is received by the card and generates an instantaneous energy with its own L/C to supply the chip to work. the other part is the instruction and data signal, which commands the chip to complete the reading, modification, storage, etc. of the data, and returns the signal to the reader to complete a read and write operation.
Click here to view the chip specification sheet
- Working voltage: 5V
- Working current: 13-100mA/DC 5V
- Idle current: 10-13mA/5V
- Sleep current: <80uA
- Peak current: <100mA
- Operating frequency: 13.56MHz
- Communication protocol: I2C
- Communication address: 0x28
- Power: 0.5W
- Length and width: 56*40mm
- Weight: 7.6g
- Support multiple card reading and writing: mifare1 S50, mifare1 S70, mifare ult, etc
- RFID electronic tags, key fobs, coin cards, IC white cards, etc
| RFID module | Arduino Uno |
|---|---|
| VCC | VCC |
| GND | GND |
| SCL | A5 |
| SDA | A4 |
click here view arduino program
click here view esp32 micropython program
Makecode extensions: emakefun-makecode-extensions/emakefun_rfid_mfrc522