Gravity: BMP388 Barometric Pressure Sensors

SKU: SEN0251

The article outlines the specifications of the Gravity BMP388 Barometric Pressure Sensor, detailing its operating voltage, current, range, and accuracy. It highlights the sensor’s temperature coefficient, absolute accuracy across various temperatures, operating temperature range, and interface options, including Gravity-IIC and SPI. The sensor's external dimensions and mounting hole specifications are also provided, making it ideal for precise environmental measurements.

Downloadable Resources

Schematics

Datasheet

GitHub

Docs

Tech Specs

1. Example Code for Arduino-Temperature, Pressure and Altitude Measurement

To detect the barometric pressure and temperature of the current environment and calculate the altitude of the environment in which the module is located.

Parameter	Value
Operating Voltage	3.3V-5.5V
Operating Current	0.5mA
Operating Range	300-1250 hPa
Relative Accuracy	±8 Pa (equivalent to ±0.50m @700-900hPa, 25℃-40℃)
Absolute Accuracy	±50 Pa（0℃-65℃@300-1100hPa）
Temperature Coefficient Offset	±0.75 Pa/K（-20℃-65℃@700-1100hPa）
Absolute Accuracy Temperature	±0.5℃（@0℃-65℃）
Operating Temperature	-40℃~80℃ (more accurate in 0℃-65℃)
External Dimension	22mm x 30mm
Mounting Hole Position	15mm
Mounting Hole Dimension	inside diameter 3mm/ outside diameter 6mm
Interface	Gravity-IIC 4Pin or SPI (SPI is only used at 3.3V)

Silk-screen	Description
SDA	IIC Data
SCL	IIC Clock
INT	Interrupt Output Pin
SCK	SPI-CLK
SDI	SPI-MOSI
CSB	SPI-CS
SDO	SPI-MISO/IIC Address Select
GND	Negative Pole
VCC	Positive Pole

FAQ

If temperature collection is disabled, the altitude (pressure) data may drift (increase or decrease at a certain rate) significantly beyond the normal range and cannot stabilize.

Temperature is originally used to calibrate the pressure. When measuring pressure, temperature collection should not be disabled.
How does the BMP388 Barometric Pressure Sensor communicate with the UNO using SPI?

The csPin can be set to any digital pin. Here, we choose pin 4, and the sensor's CSB is connected to UNO D4. pls download the code from here.
hey .
can we use it for measuring water level in a underground tank.

Hey,
This module measures pressure and temperature, rather than any distance information. I would suggest you use an ultrasonic range sensor which can give you the exact distance from the sensor to the top of the water level https://www.dfrobot.com/pro... or another sensor of ours can detect a water level at a preset height and trigger when water is present:https://www.dfrobot.com/pro...

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Gravity: BMP388 Barometric Pressure Sensors

Specification

Pinout

If temperature collection is disabled, the altitude (pressure) data may drift (increase or decrease at a certain rate) significantly beyond the normal range and cannot stabilize.