SparkFun
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 ...
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
Videos
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- Daisy chain
- A wiring layout where devices are connected one after another in a line. It matters because long or awkward chains can make projects messy or less convenient, while a hub lets several devices branch out from one point.
- FIFO
- FIFO stands for “first in, first out” and is a small memory buffer inside the sensor that stores recent readings in order. This matters because it can help capture motion data without the microcontroller needing to read the sensor every single instant.
- oversampling
- Taking many measurements and combining them to reduce noise and improve the stability of a reading. It matters when you want smoother current or power measurements, though it can make updates slower.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
Find this product in
Sensors & Input
BMP384 Datasheet
Datasheet · 2.1 MB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 514.2 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
