BMP180 Digital Barometric Pressure Sensor Module for Arduino - I2C Interface

The BMP180 module operates from 1.8V to 3.6V DC. It is directly compatible with 3.3V logic systems. For use with 5V Arduino boards, ensure the I2C lines are level-shifted or use the module's I2C pull-up Jumper in conjunction with external series resistors to prevent damage to the sensor IC.

Connect the module's VCC to 3.3V, GND to ground, SDA to the Arduino's SDA pin (A4 on Uno), and SCL to the SCL pin (A5 on Uno). Use the Wire library for I2C communication. Numerous open-source libraries (like Adafruit_BMP085) are available to read calibrated pressure and temperature values directly.

The PU Jumper enables or disables the onboard I2C pull-up resistors. For short cables and a single device on the bus, enabling them simplifies wiring. For longer bus lengths or multiple devices, disable the onboard pull-ups and use external resistors placed at the master end of the bus for optimal signal integrity.

Yes. The BMP180 provides factory-calibrated, temperature-compensated pressure data. Altitude can be calculated using the barometric formula. For relative altitude changes (e.g., drone height), it offers high resolution (~17 cm). For absolute altitude, an accurate reference SEA-level pressure value is required for calibration.

The sensor supports oversampling settings from 1 to 8 samples per measurement, trading speed for resolution. At a 1 Hz update rate using standard resolution, current consumption is typically 0.5 µA. Power consumption scales linearly with the update rate and selected oversampling ratio.