SparkFun Air Quality Sensor - SGP40 (Qwiic)
Sensirion SGP40 metal-oxide VOC sensor breakout outputting raw digital signal and a processed VOC Index over I2C Qwiic (1.7–3.6 V, 2.6 mA active). Allow ~1 hour warm-up for full specification accuracy.
Pinout
- GND1
Qwiic/STEMMA QT ground
Type · Ground - 3V32
Qwiic/STEMMA QT 3.3 V supply
Type · PowerVoltage · 3.3V - SDA3
I2C data
Type · I2C - SCL4
I2C clock
Type · I2C
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| GND | 1 | Ground | Qwiic/STEMMA QT ground | |
| 3V3 | 2 | Power | Qwiic/STEMMA QT 3.3 V supply | 3.3V |
| SDA | 3 | I2C | I2C data | |
| SCL | 4 | I2C | I2C clock |
Pin details
4 connections- GND1
Qwiic/STEMMA QT ground
Ground - 3V32
Qwiic/STEMMA QT 3.3 V supply
PowerVoltage · 3.3V - SDA3
I2C data
I2C - SCL4
I2C clock
I2C
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: 3V3, GND, SDA, SCL. Schematik maps them to your board in the app.
Air quality
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