DFRobot Fermion BMP280 Digital Pressure Sensor (Breakout) - I2C Interface

The default I2C address is 0x76. The BMP280 sensor's address is hardware-configured and cannot be changed via software on this specific breakout module. For systems requiring multiple I2C pressure sensors, you would need to use an I2C multiplexer or select a different sensor model with a configurable address.

Yes. The module's operating voltage range is 3.3V to 5.5V, and its I2C lines are 5V-tolerant. You can connect VCC to the Arduino's 5V pin and directly interface the SDA and SCL lines with the Arduino's I2C pins without requiring a logic level converter.

The sensor's relative pressure accuracy is ±0.12 hPa, which translates to approximately ±1 meter of altitude under stable atmospheric conditions. For precise altitude tracking, a reference pressure (e.g., SEA-level pressure) is required. Accuracy can be affected by local weather changes, so it is often used in conjunction with GPS for enhanced navigation.

The integrated temperature sensor is primarily used to thermally compensate the pressure readings, ensuring high accuracy across the operating temperature range (0°C to 65°C). The temperature data is also accessible via the I2C interface and can be used for environmental monitoring applications.