SKU: TH2065
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Adafruit BME688 brings four environmental measurements together on one compact breakout: temperature, humidity, barometric pressure, and VOC gas sensing. It communicates over I2C or SPI, making it easy to add rich environmental data to Arduino, Raspberry Pi, CircuitPython, and other embedded projects.
The BME688 is a drop-in replacement for the earlier BME680, with the added ability to program the gas-sensor heater for more controlled odor-analysis workflows. For general maker and IoT use, it is an excellent all-in-one sensor for weather stations, indoor air quality trend monitoring, smart home nodes, data logging, and altitude-aware projects.
This breakout is designed for easy integration: the sensor is mounted on a PCB with an onboard 3.3V regulator, level shifting for use with 3.3V or 5V microcontrollers, standard 2.54mm header spacing for breadboards, and built-in STEMMA QT connectors that are also SparkFun Qwiic compatible.
The onboard MOX element reacts to volatile organic compounds in the air by changing resistance. This lets the sensor provide a single VOC-related resistance value that is useful for air quality trends and environmental comparisons.
Important: the gas sensor can indicate overall VOC presence, but it does not identify or separate individual gases. It may respond to substances such as ethanol, alcohol, and carbon monoxide, but it cannot tell them apart.
For the best gas-sensing results, Bosch recommends a 48-hour burn-in when the sensor is first received, plus about 30 minutes of warm-up in the intended operating mode each time it is used. During early operation, the MOX sensor baseline will shift as it stabilizes.
Like other VOC sensors, this device shows sensor-to-sensor variability. If you need more precise gas measurement, calibration against known sources is recommended. For most environmental monitoring applications, it is best used to observe trends, compare conditions, and support air quality estimation rather than provide lab-grade gas identification.
The STEMMA QT connectors allow quick no-solder I2C hookup with a compatible cable, which is especially convenient for rapid prototyping. QT cable is not included.
| Brand | Adafruit |
|---|---|
| Model | BME688 |
| Interfaces | I2C, SPI |
| Logic Compatibility | 3.3V and 5V microcontrollers |
| Connector | STEMMA QT / Qwiic compatible |
It combines four environmental measurements in one board: temperature, humidity, barometric pressure, and VOC gas sensing. The gas sensor reports an overall VOC-related resistance value rather than identifying individual gases.
Yes. The board includes a 3.3V regulator and level shifting, so it can be used with both 3.3V and 5V microcontrollers.
The BME688 supports both I2C and SPI. The built-in STEMMA QT connectors make I2C hookup easy without soldering when used with a compatible cable, but the QT cable is not included.
Yes, the supplier describes the BME688 as a drop-in replacement for the BME680. It adds programmable gas-sensor heater control for more controlled odor-analysis, while otherwise using the same hardware.
It can respond to gases and alcohols such as ethanol, alcohol, and carbon monoxide, but it cannot distinguish one gas from another. It is best suited for air-quality trends and comparison measurements unless calibrated against known sources.
Yes. The recommended guidance is to run the sensor for 48 hours when first received, and then allow about 30 minutes of warm-up in the desired mode each time it is used.
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