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.

The SparkFun Qwiic Connect System is an ecosystem of I²C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

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

Documents:

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

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