SparkFun CO2 Humidity and Temperature Sensor - SCD40 (Qwiic)
Sensirion SCD40 photoacoustic CO2 sensor breakout measuring CO2 (0–40,000 ppm, ±30 ppm+5% accuracy from 400–2,000 ppm), temperature, and humidity via I2C Qwiic. Operates at 2.4–5.5 V, typical 18 mA active current.
Pinout
- GNDType · Ground
- 3.3VType · Power
- SDAType · I2C
- SCLType · I2C
| Pin | Type |
|---|---|
| GND | Ground |
| 3.3V | Power |
| SDA | I2C |
| SCL | I2C |
Pin details
4 connections- GNDGround
- 3.3VPower
- SDAI2C
- SCLI2C
Start wiring
I2C · Analog · UART · 3.3 – 5 V · Breakout
Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…
Module pins: 3.3V, GND, SDA, SCL. Schematik maps them to your board in the app.
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