M5Stack RFID 2 Unit (WS1850S)
13.56 MHz RFID read/write module based on the WS1850S, supporting ISO/IEC 14443 Type A and Type B cards. Connects to M5Stack Grove PORT.A via I2C.
Pinout
- GND1
Ground
Type · Ground - 5V2
5 V supply
Type · Power - SDA3
I2C data
Type · I2C - SCL4
I2C clock
Type · I2C
| Pin | Position | Type | Function |
|---|---|---|---|
| GND | 1 | Ground | Ground |
| 5V | 2 | Power | 5 V supply |
| SDA | 3 | I2C | I2C data |
| SCL | 4 | I2C | I2C clock |
Pin details
4 connections- GND1
Ground
Ground - 5V2
5 V supply
Power - SDA3
I2C data
I2C - SCL4
I2C clock
I2C
Start wiring
I2C · UART · SPI · 3.3 – 5 V · Breakout
Confirm the data interface matches your host board.
Module pins: 5V, GND, SDA, SCL. Schematik maps them to your board in the app.
RFID & NFC
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