M5Stack CO2 Unit with Temperature and Humidity Sensor (SCD40)
M5Stack Grove unit based on the Sensirion SCD40 photoacoustic CO2 sensor, measuring CO2 (400–2000 ppm, ±(50 ppm + 5% of reading)), temperature, and humidity over I2C at address 0x62. Onboard 5V-to-3.3V converter; HY2.0 Grove connector.
Pinout
- GNDHY2.0-4P PORT.A black wire
Ground
Type · GroundVoltage · 0V - 5VHY2.0-4P PORT.A red wire
Power input to unit
Type · PowerVoltage · 5V - SDAHY2.0-4P PORT.A yellow wire
I2C data, SCD40 address 0x62
Type · I2C - SCLHY2.0-4P PORT.A white wire
I2C clock
Type · I2C
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| GND | HY2.0-4P PORT.A black wire | Ground | Ground | 0V |
| 5V | HY2.0-4P PORT.A red wire | Power | Power input to unit | 5V |
| SDA | HY2.0-4P PORT.A yellow wire | I2C | I2C data, SCD40 address 0x62 | |
| SCL | HY2.0-4P PORT.A white wire | I2C | I2C clock |
Pin details
4 connections- GNDHY2.0-4P PORT.A black wire
Ground
GroundVoltage · 0V - 5VHY2.0-4P PORT.A red wire
Power input to unit
PowerVoltage · 5V - SDAHY2.0-4P PORT.A yellow wire
I2C data, SCD40 address 0x62
I2C - SCLHY2.0-4P PORT.A white wire
I2C clock
I2C
Start wiring
I2C · Analog · UART · 3.3 – 5 V · Breakout
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Module pins: GND, 5V, SDA, SCL. Schematik maps them to your board in the app.
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