Adafruit BME680 – Temperature, Humidity, Pressure and Gas Sensor

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.

Please note this sensor, like all VOC/gas sensors, has variability and to get precise measurements you will want to calibrate it against known sources! That said, for general environmental sensors, it will give you a good idea of trends and comparisons. We recommend that you run this sensor for 48 hours when you first receive it to “burn it in”, and then 30 minutes in the desired mode every time the sensor is in use. This is because the sensitivity levels of the sensor will change during early use, and the resistance will slowly rise over time as the MOX warms up to its baseline reading.

For your convenience we’ve pick-and-placed the sensor on a PCB with a 3.3V regulator and some level shifting, so it can be easily used with your favorite 3.3V or 5V microcontroller.

This detailed tutorial will get you going with code for both Arduino and CircuitPython, schematics, wiring diagrams, Fritzing objects and more!

Technical Details:

• Product Dimensions: 18.0mm x 16.5mm x 2.8mm / 0.7″ x 0.6″ x 0.1″
• Product Weight: 3.0g / 0.1oz

Documents:

• BME680 Datasheet