DESCRIPTION
The BME680 is a digital 4-in-1 sensor with VOC gas, humidity, pressure and temperature measurement based on proven sensing principles. Its small dimensions and its low power consumption enable the integration in battery-powered or frequency-coupled devices, such as handsets or wearables.
Like the BME280 & BMP280, this precision sensor from Bosch can measure humidity with ±3% accuracy, barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter or better accuracy!
The BME680 takes those sensors to the next step in that it contains a small MOX sensor. The heated metal oxide changes resistance based on the volatile organic compounds (VOC) in the air, so it can be used to detect gasses & alcohols such as Ethanol, Alcohol, and Carbon Monoxide, and perform air quality measurements. Note it will give you one resistance value, with overall VOC content, but it cannot differentiate gasses or alcohols.
Applications
- Personal air quality tracker
- Air quality mapping
- Air quality inside cars & public transport
- Enhanced context awareness
- Accurate step & calorie tracker
- Quick GPS-fix & improved navigation
- Indicator of too high / low humidity
- Air quality & well-being indicator
- Sleep / recovery tracker
- Weather trend
- Stair counter
- Floor level detection
Target Devices
- Handsets such as mobile phones, tablet PCs, GPS devices
- Wearables
- Home weather stations
- Smart watches
- Navigation systems
- Gaming, e.g. flying toys
- IOT devices
TECHNICAL DETAILS
- Communication Protocol: I2C (0x76 or 0x77) and SPI
- Operating Voltage: 3.3V-5V
- Current Consumption:
- 2.1μA @ 1Hz humidity and temperature
- 3.1μA @ 1Hz pressure and temperature
- 3.7μA @ 1Hz humidity, pressure and temperature
- 0.09‒12mA for p/h/T/gas depending on operation mode
- 0.15μA in sleep mode
- Operation Range:
- Pressure: 300-1100hPa
- Humidity: 0-100%
- Temperature: -40°C to +85°C
Gas Sensor Parameters:
- Response Time (τ33-63%): < 1s (for new sensors)
- Power Consumption: < 0.1 mA in ultra-low power mode
- Output Data Processing: Direct indoor air quality (IAQ) index output
Humidity Sensor Parameters:
- Response Time (τ0-63%): 8s
- Accuracy Tolerance: ± 3% Relative Humidity
- Hysteresis: ≤ 1.5% Relative Humidity
Pressure Sensor Parameters:
- RMS Noise: 0.12Pa (equiv. to 1.7cm)
- Sensitivity Error: ± 0.25% (equiv. to 1 m at 400 m height change)
- Temperature Coefficient Offset: ± 1.3Pa/K (equiv. to ±10.9 cm at 1°C temperature change)
SHIPPING LIST
- 1x BME680 VOC Gas, Pressure, Humidity and Temperature Sensor
- 1x Male Pin Headers