SparkFun Micro Pressure Sensor - BMP384 (Qwiic)

The SparkFun Qwiic Micro Pressure Sensor features the BMP384 pressure sensor from Bosch Sensortec. The BMP384 excels at high-resolution measurements (up to 21-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 an incredibly small footprint that uses the Qwiic Micro size (0.75in. x 0.30in. / 19.05mm x 7.62mm) so you can install it in projects with exceptionally tight spaces. The sensor also features a configurable oversampling setting, a FIFO buffer for storing up to 73 measurements, and 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. Sorry SPI users, there is no space on this Micro-sized breakout for the extra pins for that communication protocol. If you prefer a soldered connection or SPI, the Standard Qwiic version of this board features those options.

The BMP384 has three operating modes: Sleep Mode, Normal Mode and Forced Mode. In Sleep Mode, the sensor is idle and consumes ~2µA, while in Normal Mode the sensor automatically cycles between measurement and standby periodsand 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.

Note: Although this board is called "SparkFun Micro Pressure Sensor," the name only refers to the size of the board and not its sensing precision capabilities. If you are looking for a "MicroPressure" sensor calibrated to sensing pressure ranges of 1-25psi from liquid media, check out the SparkFun Qwiic MicroPressure Sensor instead!

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.

Qwiic Micro is our smallest I²C-supported board form-factor yet! At only 0.75in. by 0.30in. (or 24.65mm by 7.62mm for metric friends), Qwiic Micro is perfect for projects and applications that have space or weight concerns. With just a single Qwiic connector, Micro boards work great alongside the Qwiic Multiport or at the end of a Qwiic daisy chain.

Features:

• Qwiic Micro Sized Board (0.75in x 0.30in / 19.05mm x 7.62mm)
• Supply Voltage Range: 1.65V - 3.6V
• Current Draw:
  • 700µA - Peak while measuring pressure
  • ~2µA - Sleep Mode
• Data Transfer Speeds:
  • I²C - 3.4MHz
• I²C Address: 0x77 (Default), 0x76 (Alternate)
• Internal Temperature Sensor
• 1x Horizontal Qwiic Connection Port

Documents:

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

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