LED
LCD
Product Overview
The BMP180 (GY-68) is the industry standard for measuring barometric pressure and altitude. It is the upgraded successor to the BMP085, offering higher stability and lower noise. Whether you are tracking weather patterns or need a precise altitude hold for your drone, this module provides factory-calibrated data via a simple I2C interface.
Arduino Wiring & Connections
VCC -> Arduino 3.3V
GND -> Arduino GND
SCL -> Arduino A5 (Uno) / Pin 21 (Mega)
SDA -> Arduino A4 (Uno) / Pin 20 (Mega)
Technical Specifications
| Feature | Specification |
| Pressure Range | 300 to 1100 hPa (9000m to -500m above sea level) |
| Supply Voltage | 1.8V to 3.6V (Safe with Arduino 3.3V Pin) |
| Interface | I2C (Standard & Fast mode) |
| Current Consumption | Ultra-low (5 $\mu$A at 1 sample/sec) |
| Temperature Accuracy | $\pm 1.0°C$ |
| Resolution | 0.06 hPa (0.5m) in ultra-low power mode |
Key Features
Dual Function: Measures both ambient temperature and barometric pressure.
Altitude Calculation: Can be used to calculate highly accurate altitude readings.
Factory Calibrated: No complex calibration required by the user.
Tiny Footprint: Ideal for compact IoT devices and wearable tech.
