{"product_id":"adafruit-bmp581-i2c-or-spi-temperature-and-pressure-sensor-stemma-qt","title":"Adafruit BMP581 I2C or SPI Temperature and Pressure Sensor - STEMMA QT","description":"\u003cp\u003eA high quality Bosch temperature and pressure sensor, that can be used in either I2C or SPI configurations.\u003c\/p\u003e\n\u003cp\u003eBosch has been a leader in barometric pressure sensors, from the \u003ca href=\"https:\/\/www.adafruit.com\/product\/391\"\u003eBMP085\u003c\/a\u003e. \u003ca href=\"https:\/\/www.adafruit.com\/product\/1603\"\u003eBMP180\u003c\/a\u003e, \u003ca rel=\"noopener\" href=\"https:\/\/shop.pimoroni.com\/search?q=bmp280\" target=\"_blank\"\u003eBMP280\u003c\/a\u003e, \u003ca href=\"https:\/\/shop.pimoroni.com\/products\/adafruit-bmp388-precision-barometric-pressure-and-altimeter\" target=\"_blank\"\u003eBMP388\u003c\/a\u003e,\u003cspan\u003e \u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/shop.pimoroni.com\/products\/adafruit-bmp390-precision-barometric-pressure-and-altimeter-stemma-qt-qwiic\" target=\"_blank\"\u003eBMP390\u003c\/a\u003e... now we've got the next generation!\u003c\/p\u003e\n\u003cp\u003eThe BMP58x is the upgrade to the BMP2xx and BMP3xx - with a low-altitude noise as low as 1cm (0.08Pa) and the same fast conversion time. And like the previous BMP280, you can use I2C or SPI. For simple easy wiring, go with I2C. If you want to connect a bunch of sensors without worrying about I2C address collisions, go with SPI.\u003c\/p\u003e\n\u003cp\u003eThis sensor has an astonishing relative accuracy of\u003cstrong\u003e±0.4 Pascals\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eat 900-1100 hPa and 25°C, which translates to about ±3.3 centimeters of altitude (compare to the BMP280's ±12 Pascal\/±1 meter and BMP388's ±8 Pascal\/±0.5 meter). The typical absolute accuracy is ±30Pa or about 2.5 meters. Check the datasheet for how temperature and altitude can affect the absolute\/relative accuracy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe BMP581 is software\/firmware compatible with the \u003ca rel=\"noopener\" href=\"\/en-us\/products\/adafruit-bmp580-i2c-or-spi-temperature-and-pressure-sensor-stemma-qt\" target=\"_blank\"\u003eBMP580\u003c\/a\u003e but has better accurate\/precision measurements . \u003c\/strong\u003eIt's also more expensive! So pick this when accuracy is more important than cost.\u003c\/p\u003e\n\u003cp\u003eThe datasheet sort of implies they intend this sensor to be used for drones and quadcopters, to keep altitude stable, but you could also use this for wearables or any project that wants to track height-above-sea-level. Note that for absolute height you'll still need to enter in the barometric pressure at sea level if the weather changes, but that's true of every altimeter sensor that uses pressure. You can also measure temperature with ±0.5°C accuracy.\u003c\/p\u003e\n\u003cp\u003eNice sensor right? So Adafruit made it easy for you to get right into your next project. The surface-mount sensor is soldered onto a custom made PCB with a 3.3V regulator and level shifting so you can use it with a 3V or 5V logic microcontroller without worry. It's in the \u003ca href=\"\/en-us\/collections\/qw-st\" target=\"_blank\"\u003e\u003cstrong\u003eSTEMMA QT\u003c\/strong\u003e form factor\u003c\/a\u003e, making it easy to interface with. The \u003ca href=\"https:\/\/learn.adafruit.com\/introducing-adafruit-stemma-qt\/what-is-stemma-qt\"\u003eSTEMMA QT connectors\u003c\/a\u003e on either side are compatible with the \u003ca href=\"https:\/\/www.sparkfun.com\/qwiic\"\u003eSparkFun Qwiic\u003c\/a\u003e I2C connectors. This allows you to make solderless connections between your development board and the BMP58x or to chain it with a wide range of other sensors and accessories using a \u003ca href=\"https:\/\/www.adafruit.com\/?q=stemma%20qt%20cable\"\u003e\u003cstrong\u003ecompatible cable\u003c\/strong\u003e\u003c\/a\u003e.\u003ca rel=\"noopener\" href=\"\/en-us\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\"\u003eQT Cable is not included, but we have a variety in the shop.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cp\u003e\u003cimg height=\"80\" width=\"145\" alt=\"RoHS 2 2011 65 EU Compliant\" src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2011_65_EU.svg\"\u003e \u003cimg height=\"80\" width=\"145\" alt=\"RoHS 2 2015 863 EU Compliant\" src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2015_863_EU.svg\"\u003e\u003c\/p\u003e\n\u003ch2\u003eLearn\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-bmp580-bmp581-and-bmp585-temperature-and-pressure-sensor\"\u003ePrimary Guide: Adafruit BMP580, BMP581, and BMP585 - Temperature and Pressure Sensor\u003c\/a\u003e\u003cbr\u003eThe BMP5xx have better precision than ever, which makes them excellent for environmental sensing or as a precision altimeter. It can even be used in either I2C and SPI configurations.\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/learn.adafruit.com\/products\/6413\/guides\" target=\"_blank\"\u003eSee All Guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":55993179767163,"sku":"ADA6407","price":7.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/6407-01.jpg?v=1769689567","url":"https:\/\/shop.pimoroni.com\/en-us\/products\/adafruit-bmp581-i2c-or-spi-temperature-and-pressure-sensor-stemma-qt","provider":"Pimoroni Ltd","version":"1.0","type":"link"}