BME688 Breakout Humidity, Pressure, Temperature Air Quality Sensor

The breakout from Watterott carries the BME688 from Bosch Sensortec, which measures humidity, air pressure, temperature and gases such as volatile organic compounds (VOC). Compared to the BME680, the BME688 has a gas scanner: with the BME AI-Studio software from Bosch, models can be trained that recognise specific gas mixtures. From the readings, the Bosch BSEC software calculates an indoor air quality index (IAQ) as well as CO2 and bVOC equivalents; the sensor does not measure CO2 itself. The breakout works with 3 to 5 V and is connected via I2C or SPI; there are two Qwiic connectors on the back.

Features:

• Bosch BME688 sensor for humidity, air pressure, temperature and gas
• Gas scanner with AI models from BME AI-Studio
• Air quality index IAQ, CO2 and bVOC equivalents via the BSEC software
• Supply 3 to 5 V with voltage regulator and level shifter
• I2C and SPI interfaces
• Two Qwiic connectors on the back

Application Examples:

• Monitoring air quality in flats, offices or classrooms
• Weather station with air pressure, temperature and humidity
• Controlling ventilation by air quality
• Integration into Home Assistant with ESPHome

Documentation:

• BME688: product page and datasheet (Bosch Sensortec, English)
• ESPHome documentation: BME68x Temperature, Humidity, Pressure & Gas Sensor via BSEC2

Technical Data:

• Manufacturer: Watterott
• Manufacturer SKU: 20182337
• Sensor: Bosch Sensortec BME688
• Operating voltage: 3 to 5 V
• Interfaces: I2C, SPI
• Connectors: 2× Qwiic
• Humidity: ±3 % RH, hysteresis ≤ 1.5 % RH, response time 8 s
• Air pressure: 300 to 1100 hPa, relative ±0.12 hPa, absolute typically ±1 hPa
• Temperature: -40 to 85 °C, full accuracy 0 to 65 °C
• Gas sensor: response time below 1 s, indoor air quality index (IAQ) output
• Dimensions: 19 × 19 × 2.6 mm
• Weight: 3 g

Scope of Delivery:

• 1× BME688 Breakout Humidity, Pressure, Temperature and Air Quality Sensor
• 1× pin header 8 pins