Adafruit SGP41 Multi-Pixel Gas Sensor Breakout - VOC & NOx
Sensirion SGP41 multi-pixel MOX gas sensor breakout measuring VOC and NOx indices over I2C. Requires a separate humidity and temperature reading fed to the sensor's compensation algorithm for accurate results.
Pinout
- GNDbreakout header / STEMMA QT ground
Common ground for power and logic
Type · GroundVoltage · 0V - 3.3Vbreakout header
Onboard 3.3V regulator output
Type · PowerVoltage · 3.3V output, up to 100mA - VINbreakout header
Board power input, use same voltage as host logic
Type · PowerVoltage · 3V to 5V - SDAbreakout header / STEMMA QT
I2C data line with level shifting and 10K pullup
Type · I2CVoltage · 3V to 5V logic - SCLbreakout header / STEMMA QT
I2C clock line with level shifting and 10K pullup
Type · I2CVoltage · 3V to 5V logic
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| GND | breakout header / STEMMA QT ground | Ground | Common ground for power and logic | 0V |
| 3.3V | breakout header | Power | Onboard 3.3V regulator output | 3.3V output, up to 100mA |
| VIN | breakout header | Power | Board power input, use same voltage as host logic | 3V to 5V |
| SDA | breakout header / STEMMA QT | I2C | I2C data line with level shifting and 10K pullup | 3V to 5V logic |
| SCL | breakout header / STEMMA QT | I2C | I2C clock line with level shifting and 10K pullup | 3V to 5V logic |
Pin details
5 connections- GNDbreakout header / STEMMA QT ground
Common ground for power and logic
GroundVoltage · 0V - 3.3Vbreakout header
Onboard 3.3V regulator output
PowerVoltage · 3.3V output, up to 100mA - VINbreakout header
Board power input, use same voltage as host logic
PowerVoltage · 3V to 5V - SDAbreakout header / STEMMA QT
I2C data line with level shifting and 10K pullup
I2CVoltage · 3V to 5V logic - SCLbreakout header / STEMMA QT
I2C clock line with level shifting and 10K pullup
I2CVoltage · 3V to 5V logic
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: GND, 3.3V, VIN, SDA, SCL. Schematik maps them to your board in the app.
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