The Gravity BME688 is an advanced MEMS environmental sensor from Bosch that measures temperature, humidity, barometric pressure, and volatile organic compounds (VOC) in a single compact module. It supports both I²C and SPI interfaces via a Gravity connector, making integration with Arduino and other microcontrollers straightforward.

What sets the BME688 apart from the earlier BME680 is its AI-driven gas analysis capability. Using the Bosch BME AI-Studio and BSEC2 Arduino Library, you can train custom gas profiles to detect and classify specific VOCs — ideal for air quality monitoring, environmental research, and industrial safety applications.

Key Features

• 4-in-1 Environmental Sensing – Temperature, humidity, barometric pressure, and VOC
• AI Gas Analysis – Train custom gas detection profiles via Bosch BME AI-Studio
• High Accuracy – ±0.5 °C temperature, ±3% RH humidity, ±0.6 hPa pressure
• I²C/SPI Interface – Gravity connector for plug-and-play wiring
• Wide Voltage Support – 3.3–5 V DC
• Built-In Heater – Minimises ambient interference for stable VOC readings

Specifications

• Sensor IC – Bosch BME688
• Operating Voltage – 3.3–5 V DC
• Operating Current – 5 mA (25 mA with VOC measurement enabled)
• Interface – I²C / SPI (Gravity connector)
• Temperature Range – −40 to +85 °C (±0.5 °C accuracy, 0–65 °C)
• Humidity Range – 0–100% RH (±3% RH accuracy, 20–80% RH at 25 °C)
• Pressure Range – 300–1100 hPa (±0.6 hPa accuracy, 0–65 °C)
• Module Dimensions – 30 × 22 mm

Ideal For

• DIY weather stations
• Indoor air quality monitoring and smart home systems
• Portable environmental monitoring devices
• Agricultural climate sensing
• Scientific experiments and climate research

Resources

• Product Wiki (includes pinout, tutorial, and API reference)
• BME688 Datasheet (PDF)
• Schematic (PDF)
• PCB Layout (PDF)
• BSEC2 Arduino Library (GitHub)
• Bosch BME AI-Studio

Package Contents

• 1× Gravity BME688 Environmental Sensor Module