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SGP30 TVOC and eCO2 Air Quality Sensor with I2C and Grove Interface
The M5Stack U088 Unit Mini TVOC/eCO2 is a compact digital gas-sensing module based on the Sensirion SGP30 multi-pixel gas sensor. It is designed for indoor air-quality monitoring and provides processed Total Volatile Organic Compound (TVOC) and equivalent carbon dioxide (eCO2) readings. The SGP30 integrates multiple metal-oxide sensing elements, a temperature-controlled micro-hotplate, and digital signal processing in a compact sensor package.
The module communicates through I2C at address 0x58 and provides TVOC readings from 0 to 60,000 ppb and eCO2 readings from 400 to 60,000 ppm. On-chip baseline compensation supports long-term measurement stability, while humidity compensation can be applied using data from an external humidity sensor. The HY2.0-4P Grove interface enables convenient connection to M5Stack controllers, and two LEGO-compatible mounting holes simplify mechanical integration into air-quality monitors, ventilation systems, and IoT projects.
Key Features

Sensirion SGP30 digital multi-pixel gas sensor
Measures Total Volatile Organic Compounds (TVOC)
Provides equivalent CO2 (eCO2) output
TVOC output range from 0 to 60,000 ppb
eCO2 output ranges from 400 to 60,000 ppm
Ethanol sensing range up to 1000 ppm
Hydrogen sensing range up to 1000 ppm
Recommended TVOC and eCO2 sampling rate of 1 Hz
Digital I2C communication
Default I2C address: 0x58
On-chip baseline compensation
Supports humidity compensation using external humidity data
HY2.0-4P Grove interface
2 LEGO-compatible mounting holes
Compact polycarbonate enclosure
Supports UiFlow1, UiFlow2, Arduino, and Home Assistant integration
Suitable for indoor air-quality and IoT monitoring

Applications

Indoor air-quality monitoring
Air purifier systems
Demand-controlled ventilation
Smart home air monitoring
IoT environmental sensing
TVOC monitoring systems
Building automation
HVAC monitoring
Smart ventilation systems
Environmental data logging
Educational sensor projects
Home Assistant air-quality nodes

Model Size

Package Includes:

1 x Unit Mini TVOC/eCO2
1 x HY2.0-4P Grove cable (5cm)