Gravity BMP388 Barometric Pressure Sensor

The Gravity barometric pressure sensor from DFRobot measures air pressure and temperature with the Bosch BMP388. The altitude can be calculated from the air pressure; the relative accuracy of ±8 Pa corresponds to about ±0.5 m. It connects via I2C with the Gravity connector or via SPI and runs on 3.3 V and 5 V.

More accurate alternative with ±0.3 hPa: Gravity BMP581 Barometric Pressure Sensor I2C UART

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces

Features:

• Air pressure and temperature, from which altitude and relative floor height can be derived
• Low current consumption, low noise, high resolution
• I2C via Gravity 4-pin or SPI, SPI only at 3.3 V (DFRobot)
• Pin SDO selects the I2C address, pin INT as interrupt output
• Do not disable the temperature measurement, it corrects the pressure; otherwise the altitude value drifts (DFRobot)
• Library and example code for Arduino by DFRobot

Application Examples:

• Altitude measurement for drones and model aircraft
• Floor detection and indoor navigation, together with an IMU
• Weather station
• Supplement to GPS

Documentation:

• Wiki DFRobot SEN0251 with example code for Arduino
• Library DFRobot_BMP3XX (GitHub)
• Schematic (PDF)
• Datasheet BMP388 (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0251
• Sensor: Bosch BMP388
• Operating voltage: 3.3 to 5.5 V DC
• Operating current: 0.5 mA
• Measuring range: 300 to 1250 hPa
• Relative accuracy: ±8 Pa, equivalent to ±0.5 m (700 to 900 hPa, 25 to 40 °C)
• Absolute accuracy: ±50 Pa (0 to 65 °C, 300 to 1100 hPa)
• Temperature coefficient offset: ±0.75 Pa/K (-20 to 65 °C, 700 to 1100 hPa)
• Temperature accuracy: ±0.5 °C (0 to 65 °C)
• Operating temperature: -40 to 80 °C, more accurate in the range 0 to 65 °C
• Interface: Gravity I2C 4-pin or SPI
• Pins: SDA, SCL, INT, SCK, SDI, CSB, SDO, GND, VCC
• Dimensions: 22 × 30 × 7.5 mm, hole spacing 15 mm, holes 3 mm
• Weight: 15 g

Scope of Delivery:

• 1× Gravity BMP388 Barometric Pressure Sensor
• 1× Gravity sensor cable PH2.0 4-pin