Adafruit BMP585 Ported I2C / SPI Temperature and Pressure Sensor – STEMMA QT

The Adafruit BMP585 Precision Barometric Pressure and Altimeter Breakout offers ±6Pa relative accuracy (≈±50cm altitude), ±0.5°C temperature sensing, I2C/SPI support, and a port for tube attachment. It includes STEMMA QT/Qwiic connectors and 3V/5V compatibility for flexible integration.

Bosch has been a leader in barometric pressure sensors, from the BMP085, BMP180, BMP280, BMP388, BMP390… now we’ve got the next generation, the Adafruit BMP585 Precision Barometric Pressure and Altimeter Breakout. As you would expect, this sensor is similar to its earlier versions but even better. The BMP585 has better precision than ever, which makes it excellent for environmental sensing or as a precision altimeter. It can even be used in either I2C or SPI configurations.

The BMP585 is the next-generation of sensors from Bosch and 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. Similar to the previous BMP280, you can use either 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.

This sensor has a relative accuracy of ±6 Pascals at room temperature, which translates to about ±50 centimetres of altitude (compare to the BMP280’s ±12 Pascal/±1 meter and BMP388’s ±8 Pascal/±0.5 meter). The typical absolute accuracy is ±60 Pa or about 5 meters. Check the datasheet for how temperature and altitude can affect the absolute/relative accuracy.

The BMP585 is software/firmware compatible with the BMP580/BMP581 but comes with a port that can have a tube attached! Note that it has approximately the accuracy/precision as BMP580, it’s not as accurate/precise as the BMP581. It’s also more expensive, so pick this one when you need a ported sensor!

The 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 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.

Nice sensor, right? So we 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 STEMMA QT form factor, making it easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic 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 compatible cable. Please note, the QT Cable is not included, but we have a variety in our Qwiic and STEMMA QT section.

Check out the Arduino library to get data out in under 10 minutes!

Resources

• BMP585 Datasheet
• Primary Guide: Adafruit BMP580, BMP581, and BMP585 – Temperature and Pressure Sensor

Package Contents

• 1x Adafruit BMP585 Ported I2C / SPI Temperature and Pressure Sensor – STEMMA QT
• 1x 8-pin header