M5Stack Mini RFID Unit MFRC522 U031
MFRC522-based RFID reader unit, verified by DigiKey-hosted U031 datasheet and M5Stack source.
Pinout
- HY2.0-4P (Grove): GNDType · Ground
- HY2.0-4P (Grove): 5VType · Power
- HY2.0-4P (Grove): SDAType · Signal
- HY2.0-4P (Grove): SCLType · Signal
| Pin | Type |
|---|---|
| HY2.0-4P (Grove): GND | Ground |
| HY2.0-4P (Grove): 5V | Power |
| HY2.0-4P (Grove): SDA | Signal |
| HY2.0-4P (Grove): SCL | Signal |
Pin details
4 connections- HY2.0-4P (Grove): GNDGround
- HY2.0-4P (Grove): 5VPower
- HY2.0-4P (Grove): SDASignal
- HY2.0-4P (Grove): SCLSignal
Start wiring
I2C · UART · SPI · 3.3 – 5 V · Breakout
Confirm the data interface matches your host board.
Module pins: HY2.0-4P (Grove): 5V, HY2.0-4P (Grove): GND, HY2.0-4P (Grove): SDA, HY2.0-4P (Grove): SCL. Schematik maps them to your board in the app.
RFID & NFC
24 other optionsPN532 and WS1850S 13.56 MHz readers, ID01 UHF RFID modules (UART/RS485/USB), MiFare Classic 1K cards and fobs, and the I2C-rewritable ST25DV16K dynamic tag.
13.56 MHz RFID/NFC Silicone Bracelet - MiFare Classic 1K visual preview13.56 MHz RFID/NFC Silicone Bracelet - MiFare Classic 1K
13.56 MHz RFID/NFC Tag Assortment - MiFare Classic 1K (5-pack) visual preview13.56 MHz RFID/NFC Tag Assortment - MiFare Classic 1K (5-pack)
13.56MHz RFID Module (Embedded PCB Antenna) visual preview13.56MHz RFID Module (Embedded PCB Antenna)
13.56MHz RFID/NFC White Tag - Classic 1K visual preview13.56MHz RFID/NFC White Tag - Classic 1K
Adafruit ST25DV16K I2C RFID EEPROM Breakout - STEMMA QT / Qwiic visual previewAdafruit ST25DV16K I2C RFID EEPROM Breakout - STEMMA QT / Qwiic
Gravity: UART & I2C NFC Module visual previewGravity: UART & I2C NFC Module
ID01 UHF RFID Module-RS485 visual previewID01 UHF RFID Module-RS485
ID01 UHF RFID Module-UART visual previewID01 UHF RFID Module-UART
ID01 UHF RFID Reader-USB visual previewID01 UHF RFID Reader-USB
M5Stack RFID 2 Unit (WS1850S) visual previewM5Stack RFID 2 Unit (WS1850S)
$4.95
MiFare Classic 13.56 MHz RFID/NFC Card - 1 KB visual previewMiFare Classic 13.56 MHz RFID/NFC Card - 1 KB
MiFare Classic 13.56 MHz RFID/NFC Clear Keychain Fob - 1 KB visual previewMiFare Classic 13.56 MHz RFID/NFC Clear Keychain Fob - 1 KB
Related groups
4 groups
2.4 GHz Bluetooth Low Energy 4.0 Module V-13051 (-4 dBi) visual previewBluetooth
BLE 5-era modules (nRF52840, MDBT50Q), XIAO MG24 boards with Matter-over-Thread, Bluefruit UART/SPI bridges, HM-11 serial modules, and BLE sniffers cover different jobs and different hosts.
Wireless & comms · Bluetooth modules · 71 parts
600-6000MHz 5G Antenna visual previewCellular
Adafruit FONA GSM breakouts, the Gravity Air780EU 4G Cat 1 module, Dragino NB-IoT Shield-B8, Pycom FiPy, Quectel and SIMCom M.2 5G modems, and the RockBLOCK 9603 Iridium modem each target a different network tier.
Wireless & comms · Cellular · 58 parts
4G GNSS-RTK High Precision Positioning Kit (EMEA & Thailand, GPS / GLONASS / Galileo / BDS / QZSS) visual previewGNSS & GPS
Adafruit Ultimate GPS (PA1616S/PA1616D), NEO-6M and NEO-M9N u-blox breakouts, Gravity GNSS BeiDou boards with I2C/UART, and 4G or LoRa RTK kits — accuracy and constellation requirements split them.
Wireless & comms · GNSS & GPS · 68 parts
2mm 10-Pin XBee Header visual previewLoRa & RF
RFM95W and SX1262 LoRa transceivers, Wio-E5 LoRaWAN modules, SX1302 gateways, Digi XBee mesh radios, 433 MHz ASK serial links, Dragino IoT sensor nodes, and the SDRplay RSP2 wideband SDR receiver.
Wireless & comms · LoRa & RF modules · 94 parts