SparkFun Pressure Sensor – BMP384 (Qwiic)

The SparkFun Qwiic Pressure Sensor features the BMP384 pressure sensor from Bosch Sensortec. The BMP384 excels at high-resolution measurements (up to 24-bit) and uses a gel-filled cavity to provide extra resistance to liquids (water and other chemicals). This makes it a great option for monitoring pressure near water or in humid environments though the sensor is not water-proof without an adequate integration concept.

The BMP384 provides excellent accuracy across a wide measurement range (300hPa to 1250hPa and -40 to +85°C) on a footprint that uses the Qwiic Standard size (1.0in. x 1.0in.). The sensor also features a configurable oversampling setting, a FIFO buffer for storing up to 73 measurements, as well as a low pass filter so users can customize the performance based on the application’s requirements. The Qwiic Pressure Sensor communicates over I²C by default, utilizing our handy Qwiic system so no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1”-spaced pins in case you prefer to use a breadboard and also supports using the BMP384 over SPI.

The BMP384 has three operating modes: Sleep Mode, Normal Mode and Forced Mode. While in Sleep Mode the sensor is idle and consumes ~2µA. While in Normal Mode, the sensor automatically cycles between measurement and standby periods and consumes ~700µA at peak current draw during measurements. Forced Mode allows direct control of measurements to wake the sensor from Sleep Mode, take a single-shot measurement, and return the device to Sleep Mode.

Get started with the Qwiic BMP384 pressure sensor guide

Features

• Supply Voltage Range: 1.65V – 3.6V
• Current Draw:
• 700µA – Peak while measuring pressure
• 3.4 µA @ 1Hz – Pressure and temperature monitoring with Ultra Low Power oversampling settings
• ~2µA – Sleep Mode
• Data Transfer Speeds:
• I2C – 3.4MHz
• SPI – 10MHz
• I2C Address: 0x77 (Default), 0x76 (Alternate)
• Internal Temperature Sensor

Resources

• Schematic
• Eagle Files
• Board Dimensions
• Datasheet (BMP384)
• Hookup Guide
• Qwiic Info Page
• BMP384 Arduino Library
• GitHub Hardware Repo