The Adafruit LPS25 Pressure Sensor Breakout features the ST LPS25HB — an absolute barometric pressure sensor that measures atmospheric pressure from 260 to 1260 hPa. Use it for weather monitoring, altitude estimation, or any project where accurate air pressure readings are needed.

The LPS25 delivers 24-bit pressure measurements at up to 25 Hz, with accuracy within 0.2 hPa after calibration. This STEMMA QT breakout includes level shifting and voltage regulation, making it compatible with both 3.3 V and 5 V systems. Connect via solderless STEMMA QT/Qwiic cables or solder to the standard header pins for breadboard use.

Key Features

• Wide Pressure Range – 260 to 1260 hPa absolute pressure measurement
• 24-Bit Resolution – High-precision pressure data at up to 25 Hz
• ±0.2 hPa Accuracy – After calibration (±1 hPa before calibration)
• STEMMA QT / Qwiic – Solderless I2C connectors for easy plug-and-play wiring
• 3.3 V and 5 V Compatible – Onboard voltage regulator and level shifting
• Arduino & CircuitPython Libraries – Ready-to-use libraries with example code

Ideal For

• Weather stations and barometric pressure monitoring
• Altitude estimation and indoor navigation
• Environmental sensing and data logging
• IoT sensor nodes and portable instruments

Package Contents

• 1× Adafruit LPS25 Pressure Sensor Breakout (STEMMA QT)

Resources

• LPS25 Pressure Sensor Guide – Arduino & CircuitPython
• What is STEMMA QT?