{"product_id":"adafruit-bme688-temperature-humidity-pressure-and-gas-sensor","title":"Adafruit BME688 - Temperature, Humidity, Pressure and Gas Sensor","description":"\u003cp\u003eThe long-awaited BME688 from Bosch gives you \u003cem\u003eall the environmental sensing you want\u003c\/em\u003e in one small package. This little sensor contains \u003cstrong\u003etemperature\u003c\/strong\u003e, \u003cstrong\u003ehumidity\u003c\/strong\u003e, \u003cstrong\u003ebarometric pressure,\u003c\/strong\u003e and \u003cstrong\u003eVOC gas\u003c\/strong\u003e sensing capabilities. All over SPI or I2C at a great price!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe BME688 is a 'drop in' replacement for the BME680\u003c\/strong\u003e - it adds a method of programming the gas-sensor heater for controlled odor-analysis but is otherwise the same hardware. Check out this EYE ON NPI for more details about the machine-learning system you can use to program this sensor for odor detection.\u003c\/p\u003e\n\u003cp\u003eLike the BME280 \u0026amp; 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!\u003c\/p\u003e\n\u003cp\u003eThe BME688 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 \u0026amp; 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note this sensor, like \u003cem\u003eall\u003c\/em\u003e VOC\/gas sensors, has variability, and to get precise measurements you will want to calibrate it against known sources!\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003eFor 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. All of the pins of the BME688 are available on standard 0.100”\/ 2.54mm pitch headers for use with a breadboard. Should you wish to avoid soldering, we now also include our \u003cstrong\u003eStemma QT\u003c\/strong\u003e connectors (SparkFun Qwiic compatible). \u003cstrong\u003eUsing these handy connectors you can simply plug in the sensor, no soldering required! \u003c\/strong\u003eQT Cable is not included, but we have a variety in the shop\u003c\/p\u003e\n\u003cp\u003eOur detailed tutorial will get you going with code for both \u003cstrong\u003eArduino\u003c\/strong\u003e and \u003cstrong\u003eCircuitPython\u003c\/strong\u003e, schematics, wiring diagrams, Fritzing objects, and more!\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cdiv id=\"tab-technical-details-content\" class=\"panel-collapse collapse in\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-lg-12 col-md-12 col-sm-12 col-xs-12\"\u003e\n\u003cul\u003e\n\u003cli\u003eProduct Dimensions: 25.5mm x 17.6mm x 4.6mm \/ 1.0\" x 0.7\" x 0.2\"\u003c\/li\u003e\n\u003cli\u003eProduct Weight: 1.7g \/ 0.1oz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul id=\"product-files\"\u003e\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":46375209599033,"sku":"ffu1787258222232","price":12.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0795\/9176\/8121\/files\/adafruit-bme688---temperature-humidity-pressure-and-gas-sensor_1.jpg?v=1787258231","url":"https:\/\/myoutfitstore.shop\/products\/adafruit-bme688-temperature-humidity-pressure-and-gas-sensor","provider":"My Store","version":"1.0","type":"link"}