BME688
BME688 Environmental Sensor 4-in-1
Professional electronic component
v1.0
2025-09-30
Rev. A
Product Overview
The BME688 Environmental Sensor 4-in-1 is a compact module that integrates temperature, humidity, barometric pressure, and gas sensing (including VOCs and IAQ) in a single package. Based on Bosch Sensortec technology, it offers digital I²C/SPI interfaces for easy integration with platforms like Arduino, ESP32, and Raspberry Pi. Its low power consumption and small size make it ideal for wearables, portable devices, and IoT applications. The sensor also supports AI-based gas classification via Bosch’s BME AI-Studio, enabling advanced air quality monitoring.
Product Views
TOP VIEW
Component placement and connectors
BOTTOM VIEW
Underside components and connections
KEY TECHNICAL
SPECIFICATIONS
SPECIFICATIONS
🔌 CONNECTIVITY
Primary Interface:
GPIO (Interrupt)
Connector Type:
JST 4-pin 1.0mm
Logic Levels:
VCC-referenced (2V – 5.5V tolerant)
KEY FEATURES
Relative Humidity
Accurately measures ambient moisture for precise environmental monitoring.
Barometric Pressure
Detects atmospheric pressure changes to support dynamic weather tracking.
Excellent Temperature Stability
Delivers consistent temperature readings even under varying conditions.
Gas Sensing
Monitors a range of gases to help identify potential environmental hazards.
Power Consumption:
Optimized for low power usage, making it ideal for battery-operated devices.
Interfaces:
I²C and SPI
Input Voltage via VCC Pin:
3.6–6.0 V (through onboard voltage regulator)
ADDITIONAL TECHNICAL INFORMATION
📦 Overview
| Parameter | Value/Description |
|---|---|
| Operating Voltage | 1.71V to 3.6V |
| Supply Current | 0.9 µA (sleep), 2.1 µA (ULP), ~920 µA (gas scan) |
| Operating Temperature | -40°C to +85°C |
| Relative Humidity Range | 0% to 100% RH |
| Pressure Range | 300 hPa to 1100 hPa |
| Gas Sensing | VOCs, IAQ index via integrated gas sensor |
| Interfaces | I²C and SPI (up to 3.4 MHz) |
| Package Size | 3.0 × 3.0 × 0.93 mm³ |
⚙️ Technical Specifications
| Parameter | Technical Data |
|---|---|
| Package dimensions | 8-Pin LGA with metal3.0 x 3.0 x 0.93 mm³ |
| Operation range (full accuracy) | Pressure: 300...1100 hPaHumidity: 0…100%Temperature: -40…85°C |
| Supply voltage VDDIO | 1.2 - 3.6 V |
| Supply voltage VDD | 1.71 - 3.6 V |
| Interface | I²C and SPI |
| Average current consumption | 2.1 µA at 1 Hz humidity and temperature3.1 µA at 1 Hz pressure and temperature3.7 µA at 1 Hz humidity, pressure and temperature90 µA at ULP mode for p/h/T & air quality0.9 mA at LP mode for p/h/T & air quality3.9 mA in standard gas scan mode (gas scan mode & scan rate can be optimized on applications with BME AI studio) |
| Gas sensor - F1 score for H₂S scanning | 0.94 |
| Gas sensor - Standard scan speed | 10.8 s / scan |
| Gas sensor - Electric charge for standard scan | 0.18 mAh (5 scans ~ 1 min) |
| Gas sensor - Response time (τ 33-63%) | < 1 s (for new sensors) |
| Gas sensor - Sensor-to-sensor deviation | +/- 15% |
| Gas sensor - Power consumption | < 0.1 mA in ultra-low power mode |
| Gas sensor - Output data processing | Major direct outputs: Index for Air Quality (IAQ), bVOC-& CO₂-equivalents (ppm), Gas scan result (%) & many more (all listed in datasheet in Table 20: BSEC outputs) |
| Humidity sensor - Response time (τ0-63%) | 8 s |
| Humidity sensor - Accuracy tolerance | ± 3 % relative humidity |
| Humidity sensor - Hysteresis | ≤ 1.5 % relative humidity |
| Pressure sensor - RMS Noise | 0.12 Pa (equiv. to 1.7 cm) |
| Pressure sensor - Sensitivity Error | ± 0.25 % (equiv. to 1 m at 400 m height change) |
| Pressure sensor - Temperature coefficient offset | ±1.3 Pa/K (equiv. to ±10.9 cm at 1°C temperature change) |
## ⚙️ Technical Specifications
| Parameter | Technical Data |
|---|---|
| Package dimensions | 8-Pin LGA with metal3.0 x 3.0 x 0.93 mm³ |
| Operation range (full accuracy) | Pressure: 300...1100 hPaHumidity: 0…100%Temperature: -40…85°C |
| Supply voltage VDDIO | 1.2 - 3.6 V |
| Supply voltage VDD | 1.71 - 3.6 V |
| Interface | I²C and SPI |
| Average current consumption | 2.1 µA at 1 Hz humidity and temperature3.1 µA at 1 Hz pressure and temperature3.7 µA at 1 Hz humidity, pressure and temperature90 µA at ULP mode for p/h/T & air quality0.9 mA at LP mode for p/h/T & air quality3.9 mA in standard gas scan mode (gas scan mode & scan rate can be optimized on applications with BME AI studio) |
| Gas sensor - F1 score for H₂S scanning | 0.94 |
| Gas sensor - Standard scan speed | 10.8 s / scan |
| Gas sensor - Electric charge for standard scan | 0.18 mAh (5 scans ~ 1 min) |
| Gas sensor - Response time (τ 33-63%) | < 1 s (for new sensors) |
| Gas sensor - Sensor-to-sensor deviation | +/- 15% |
| Gas sensor - Power consumption | < 0.1 mA in ultra-low power mode |
| Gas sensor - Output data processing | Major direct outputs: Index for Air Quality (IAQ), bVOC-& CO₂-equivalents (ppm), Gas scan result (%) & many more (all listed in datasheet in Table 20: BSEC outputs) |
| Humidity sensor - Response time (τ0-63%) | 8 s |
| Humidity sensor - Accuracy tolerance | ± 3 % relative humidity |
| Humidity sensor - Hysteresis | ≤ 1.5 % relative humidity |
| Pressure sensor - RMS Noise | 0.12 Pa (equiv. to 1.7 cm) |
| Pressure sensor - Sensitivity Error | ± 0.25 % (equiv. to 1 m at 400 m height change) |
| Pressure sensor - Temperature coefficient offset | ±1.3 Pa/K (equiv. to ±10.9 cm at 1°C temperature change) |
HARDWARE DOCUMENTATION
MECHANICAL DIMENSIONS
Physical dimensions and mounting specifications (measurements in millimeters)
SYSTEM TOPOLOGY
Connection topology and system integration diagram
Click image to open in full size
Component Reference
| Ref. | Description |
|---|---|
| IC1 | BME688 Environmental Sensor |
| L1 | Power On LED |
| U1 | AP2112K 3V3 Regulator |
| JP1 | 2.54 mm Castellated Holes |
| J1 | QWIIC Connector (JST 1 mm pitch) for I2C |
| Ref. | Description |
|---|---|
| IC1 | BME688 Environmental Sensor |
| L1 | Power On LED |
| U1 | AP2112K 3V3 Regulator |
| JP1 | 2.54 mm Castellated Holes |
| J1 | QWIIC Connector (JST 1 mm pitch) for I2C |
CIRCUIT SCHEMATIC
Complete circuit schematic showing all component connections
