The Adafruit BMP58x is the next-generation of pressure 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.
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 BMP58x Precision Barometric Pressure and Altimeter Breakout. As you would expect, this sensor is like its earlier versions but even better. The BMP581 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.
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.
This sensor has an astonishing relative accuracy of ±0.4 Pascals at 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.
The BMP581 is software/firmware compatible with BMP580 but has better accurate/precision measurements. It's also more expensive! So, pick this when accuracy is more important than cost.
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 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.
Nice sensor, right? So, we have made it easy for you to get right into your next project. The surface-mount sensor is soldered onto a custom-made PCB in the STEMMA QT form factor, making them 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.
QT Cable is not included, but we have a variety available.
Nice sensor, right? So, we have made it easy for you to get right into your next project. The surface-mount sensor is soldered onto a PCB and comes with a 3.3V regulator and level shifting so you can use it with a 3V or 5V logic microcontroller without worry.
Features:
- High-resolution 24-bit pressure and temperature measurements
- I2C and SPI interface support
- Built-in digital signal processing with IIR filter
- Multiple power modes for optimized power consumption
- Configurable oversampling and output data rates
- Wide operating temperature range: -40°C to +85°C
- Pressure range: 300-1250 hPa
- Low power consumption
- FIFO buffer support
