BSD license, all text above must be included in any redistribution Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Limor Fried & Kevin Townsend for Adafruit Industries. ***ĭesigned specifically to work with the Adafruit BME680 Breakout -> These sensors use I2C or SPI to communicate, 2 or 4 pins are required to interface. To read gas, pressure, temperature, and humidity we’ll use a sketch example from the library.Īfter installing the BME680 library, and the Adafruit_Sensor library, open the Arduino IDE and, go to File > Examples > Adafruit BME680 Library > bme680async. Code Arduino – Reading BME680 Gas, Pressure, Humidity and Temperature The BME680 supports I2C and SPI Interfaces.Īfter installing the libraries, restart your Arduino IDE. The following table shows the operation range for the temperature, humidity and pressure sensors for the BME680. Here’s the accuracy of the temperature, humidity and pressure sensors of the BME680: Sensor After that, it is also recommend to run the sensor for 30 minutes before getting a gas reading. When you first get the sensor, it is recommended to run it for 48 hours after start collecting “real” data. To get precise measurements, you need to calibrate the sensor against knows sources and build a calibration curve. So, you can get trends, compare your results and see if the air quality is increasing or decreasing. The gas sensor gives you a qualitative idea of VOCs gasses in the surrounding air. Relevant Information Regarding Gas Sensor The reactions that occur on the sensor surface (thus, the resistance) are influenced by parameters other than VOC concentration like temperature and humidity. Lower concentration of VOCs » Higher resistance.Higher concentration of VOCs » Lower resistance.
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