Adafruit LPS25 Pressure Sensor Breakout Board

Adafruit LPS25 Pressure Sensor Breakout Board is designed around the ST LPS25HB, a MEMS pressure sensor. This absolute pressure sensor can quickly and easily measure the air pressure, which is useful when the user wants to know about the weather or to determine altitude. The LPS25 has a wide measurement range of 260-1260hPa with 24-bit pressure data measurements that can be read up to 25 times a second (Hz). This ensures that the user always has an up-to-date and precise measurement. The device can measure within 0.2hPa after calibration (±1hPa before calibration).

The LPS25 sensor is placed on a breakout board with level shifting circuitry and a voltage regulator. This means that not only can the user use it with a breadboard, but they can use it with a wide range of devices that have either a 3.3V or 5V logic level. The Raspberry Pi or CircuitPython compatible Metro M4 Express runs on a 3.3V logic level. A device like a Metro 328 or Arduino Uno runs on a 5V logic level. The SparkFun qwiic compatible STEMMA QT connectors have been included for the I2C bus, so there is no need to solder. All the user needs to do is plug in a compatible cable, wire it up to the device using one of Adafruit's wiring diagrams, and the user is ready to write code to start reporting measurements.

To make the coding easier, Adafruit has written libraries for Arduino and CircuitPython or Python along with accompanying example code. All the user needs to do is gather the supplies, follow the Adafruit instructions, and the user will know just how much air is moving around in your vicinity.

Published: 2020-03-30 | Updated: 2022-03-10