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The SparkFun BME688 Environmental Sensor is a breakout that combines a gas scanning sensor with temperature, humidity, and barometric pressure sensing for...

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The SparkFun BME688 Environmental Sensor is a breakout that combines a gas scanning sensor with temperature, humidity, and barometric pressure sensing for a complete environmental sensor in a single package. The gas sensor on the BME688 can detect a wide variety of volatile organic compounds (VOCs), volatile sulfur compounds (VSCs), and other gases such as carbon monoxide and hydrogen in the part per billion (ppb) range. Combine that with precise temperature, humidity, and barometric pressure and the BME688 can work as a completely standalone environmental sensor all in a 1in. x 1in. breakout!
The sensor communicates via either I2C or SPI. We've broken out the I2C pins to our Qwiic system so no soldering is required to connect it to the rest of your system but if you would prefer, both the I2C and SPI pins are also broken out to standard 0.1in.-spaced pins.
Note: While this sensor can be used with the BME AI-Studio and BSEC2 Arduino library; it is recommended for the AI functionality, users purchase the BME688 Evaluation Board (Coming Soon) for ease of use.
Important: In order to avoid contamination of its gas scanning capabilities, DO NOT touch the metallic casing of the BME688 sensor. Please, handle with care.
The SparkFun Qwiic connect system is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.
Features:
  • Uses I2C interface (Qwiic-enabled) 
    • I2C Addresses: 0x76 (Default) or 0x77
    • 2x Qwiic Connectors
  • Operating voltage range 
    • 1.71V - 3.6V
    • Typically 3.3V if using the Qwiic cable
  • Relative humidity 
    • Operating range: 0% to 100%
    • Absolute Accuracy: ±3%RH
    • Resolution: ±0.008%RH
  • Temperature 
    • Operating range: -40°C to +85 °C
    • Absolute Accuracy: ±1.0°C
    • Resolution: 0.01°C
  • Pressure 
    • Operating range: 300hPa - 1100hPa
    • Absolute accuracy: ±60Pa (0°C to 65°C)
    • Resolution: 0.18PA, highest oversampling
  • Gas 
    • F1 score for H₂S scanning: 0.92
    • Standard scan speed: 10.8 sec/scan
    • Sensor-to-sensor deviation: ± 15% ± 15
  • Typical current consumption (varies based on mode and active sensor) 
    • 2.1 µA to 18mA
    • 0.15 µA (sleep mode)
    • 3.9 mA in standard gas scan mode
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Jargon buster

Plain-language definitions for the technical terms used above.

API
An API is a software interface that lets a program control hardware or features provided by the operating system. In this product, API support matters if you want your software to adjust display settings such as brightness or contrast automatically.
breakout
A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
I2C
I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
oversampling
Taking many measurements and combining them to reduce noise and improve the stability of a reading. It matters when you want smoother current or power measurements, though it can make updates slower.
PCB
A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
Qwiic
Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
SPI
A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.

SparkFun BME688 Qwiic Schematic

Schematic · 152.8 KB · Click any page to view full size

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BME688 Datasheet

Datasheet · 2.0 MB · Click any page to view full size

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BME AI-Studio Manual

User Guide · 4.5 MB · Click any page to view full size

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SparkFun BME688 Qwiic Board Dimensions

Mechanical Drawings · 115.1 KB · Click any page to view full size

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Supplier page — sparkfun.com

Supplier Description · 627.8 KB · Click any page to view full size

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Related Tutorials

Free guides on learn.littlebird.com.au

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