BMP180 Digital Barometric Pressure and Altitude Sensor Module (4-Pin I2C)

Description

The BMP180 is a high-precision, small-footprint digital barometric pressure sensor. It is the upgraded successor to the older BMP085 sensor, offering lower power consumption, higher resolution, and better stability. This ultra-compact 4-pin module operates entirely over the I2C interface, making it incredibly easy to connect to microcontrollers like Arduino, ESP32, and Raspberry Pi.

The BMP180 is the perfect sensor for all your environmental sensing and altitude tracking projects. By measuring atmospheric pressure and temperature, it can accurately calculate changes in altitude, making it a favorite for drone navigation, weather stations, and altimeter projects.

Key Features:

Dual Functionality: Measures both barometric pressure and ambient temperature simultaneously.
Altitude Tracking: Highly accurate pressure readings allow it to calculate altitude relative to sea level down to a resolution of 17 centimeters.
Ultra-Low Power: Consumes very little current, making it ideal for battery-powered projects, wearables, and remote data loggers.
Easy 4-Pin Connection: Uses just two wires for data (I2C) and two for power. It includes an onboard 3.3V regulator so you can safely power it from a 5V source.

Technical Specifications:

Feature	Specification
Sensor Chip	Bosch BMP180
Interface	I2C (Address: 0x77)
Operating Voltage	3.3V to 5V (Onboard Voltage Regulator)
Pressure Range	300 to 1100 hPa (9000m to -500m relative to sea level)
Temperature Range	0°C to +65°C
Pressure Accuracy	±0.12 hPa (equivalent to ±1 meter altitude)
Temperature Accuracy	±1.0°C
Resolution	0.01 hPa (Pressure) / 0.1°C (Temperature)
Ultra-low Power Mode	3 µA current consumption at 1 Hz response rate
Dimensions	13mm x 10mm (Ultra-miniature size)

Pinout Configuration (4-Pin)

VCC: Power input (3.3V – 5V)
GND: Ground
SCL: I2C Serial Clock
SDA: I2C Serial Data

Common Applications:

Weather Forecasting: Predicting local weather patterns by monitoring barometric pressure trends.
Altimeters: Precision altitude tracking for RC planes, drones, and rockets.
GPS Navigation Enhancement: Helps GPS modules achieve faster and more accurate 3D position fixes by calculating the vertical (Z) axis.
Smart HVAC Systems: Monitoring indoor air pressure and ventilation.