SparkFun Pressure Sensor – BMP581 (Qwiic)

The SparkFun Qwiic BMP581 Pressure Sensor is a standard-sized, 1in. by 1in. absolute pressure sensor breakout from Bosch Sensortec. The BMP581 boasts exceptional resolution (down to 1/64Pa) and accuracy while maintaining on-chip linearization and temperature compensation to provide true absolute data for pressure and temperature. The Qwiic Pressure Sensor communicates over I²C by default, utilizing our handy Qwiic Connect System so no soldering is required to connect it to the rest of your boards. However, we still routed the I²C signals out to a set of 0.1”-spaced pins for users who prefer a soldered connection. You can also configure the board to communicate over SPI using the same 0.1′-spaced pins.

The BMP581 has a wide pressure sensing range (30 to 125kPa) with excellent accuracy across the sensing range (± 0.5hPa (max)), as well as output data rates up to 622Hz (we have only regularly achieved 500Hz in testing, though). The sensor includes a configurable oversampling setting, FIFO buffer for storing up to 32 pressure samples, programmable low-pass filtering and even 6-bytes of user-programmable non-volatile memory. All of this allows you to customize the performance based on your application’s requirements. Even without filtering, the BMP581 has very low noise (< 0.1Pa RMS).

The sensor has five operating modes: Normal, Forced, Continuous, Standby, and Deep Standby. Deep Standby consumes the least amount of current at just 1.5µA (typical) and peak current consumption by the sensor is 260µA.

Note: The Redboard is NOT included

Get Started with the SparkFun Qwiic BMP581 Pressure Sensor Guide!

Features

• Supply Voltage Range: 1.71V – 3.6V
• Current Draw:
  • 260µA – Max draw during measurements
  • 1.3µA – at 1 Hz in Low Power Mode
  • 0.55µA – Absolute minimum in Deep Standby mode
• Data Transfer Rates:
  • I²C – 1MHz
  • SPI – 12MHz
• 6-bytes of Non-Volatile Memory
• Pressure Sensing Range: 30 – 125kPa
• Pressure Data Resolution: 1/64Pa
• Absolute Pressure Accuracy: ±0.5hPa
• Temperature Sensing Range: -40 – 85 °C
• Output Data Rate: 0.125 – 240Hz (Normal Mode)
• Max Output Data Rate: 622Hz (Continuous Mode, 1x Oversampling)
• I²C Address: 0x47 (Default), 0x46 (Alternate)
• 2x Qwiic Connectors

Resources

• Schematic
• Eagle Files
• Board Dimensions
• Hookup Guide
• Datasheet (BMP581)
• Arduino Library
• GitHub Hardware Repo