| Feature | Details |
| Pressure Range | 300 to 1100 hPa (9000m to -500m above sea level) |
| Interface | I2C (Standard Address: 0x77) |
| Supply Voltage | 1.8V to 3.6V (Module often includes 5V regulator) |
| Resolution | 0.03 hPa / 0.25m |
| Temperature Range | -40°C to +85°C |
| Power Consumption | 5 μA (Standard Mode) |
Product Description The BMP180 Digital Barometric Pressure Sensor is a high-precision, low-power sensing solution based on Bosch’s piezo-resistive technology. It is designed to measure absolute atmospheric pressure and ambient temperature. Because atmospheric pressure changes with altitude, this sensor is primarily used as a highly accurate Altimeter. It is the successor to the older BMP085 and offers improved stability and lower noise. It is a favorite at Robogears for drone flight stabilization, weather stations, and indoor navigation systems where detecting floor-level changes is required.
Key Highlights
Digital Accuracy: Provides fully calibrated digital data via I2C, eliminating the need for complex analog-to-digital conversions or external calibration.
Precise Altimetry: Capable of detecting altitude changes as small as 17cm, making it ideal for drone hovering and vertical positioning.
Integrated Temperature Sensor: Every pressure reading is temperature-compensated internally, and the raw temperature data is also available for your application.
Ultra-Low Power: Designed for mobile and wearable devices; its minimal current draw makes it perfect for long-term battery-operated logging.
Compact Breakout: The module typically includes pull-up resistors on the I2C lines and a voltage regulator, making it directly compatible with 5V microcontrollers like the Arduino Uno.
Technical Specifications
Peak Current: 650 μA (during conversion)
Pressure Noise: 0.02 hPa (Advanced Mode)
Response Time: 5ms to 7.5ms
Dimensions: 13mm x 10mm
Operating Logic: 3.3V (The module may handle 5V depending on the specific breakout version)
Installation Tip from Robogears To use this with an Arduino, we recommend the Adafruit BMP085/BMP180 Library. Connect SDA to A4 and SCL to A5 (on an Uno). Since barometric pressure is affected by local weather conditions, you must provide the sensor with the current Sea Level Pressure (typically ~1013.25 hPa) in your code to get an accurate absolute altitude reading. Keep the sensor away from direct airflow (like prop-wash from a drone) and rapid temperature changes, as these can cause "ghost" altitude fluctuations.
Note: This product is the BMP180 Sensor Module ONLY. Header pins may require soldering. Product images are for illustration purposes only.