| Feature | Details |
| Pressure Range | 300 to 1100 hPa |
| Altitude Range | 0 to 9000 meters |
| Interface | I2C and SPI (Universal Compatibility) |
| Supply Voltage | 1.8V to 3.6V (Module often handles 5V) |
| Pressure Accuracy | ±0.12 hPa (equiv. to ±1m) |
| Power Consumption | 2.7 μA (at 1Hz sampling) |
Product Description The BMP280 Digital Barometric Pressure Sensor is the next-generation upgrade to the popular BMP180. Designed by Bosch, this high-precision sensor is specifically optimized for mobile applications where size and power consumption are critical. It measures atmospheric pressure and temperature with remarkable stability and low noise. Because it can detect pressure changes with high resolution, it serves as an exceptional Altimeter with a vertical resolution of up to 12cm. Whether you are building a flight controller for a drone, an indoor navigation system, or a portable weather logger, the BMP280 offers the versatility of both I2C and SPI communication protocols in an ultra-miniature package.
Key Highlights
Enhanced Precision: Offers significantly better resolution and lower power consumption than its predecessor (BMP180), making it suitable for modern IoT and wearable tech.
Dual Interface Support: Features both I2C (default) and SPI interfaces, giving you flexibility in your circuit design and communication speed.
Dynamic Range: Capable of measuring pressure from sea level to the tops of the highest mountains, with built-in temperature compensation for accurate readings in any climate.
Miniature Footprint: The extremely small sensor die is mounted on a compact breakout board, perfect for space-constrained robotic builds.
Intelligent Power Modes: Supports several power modes (Sleep, Forced, and Normal) to help maximize battery life in remote sensing applications.
Technical Specifications
Relative Accuracy: ±0.12 hPa
Absolute Accuracy: ±1.0 hPa
Temperature Resolution: 0.01°C
Response Time: ~5.5ms
Dimensions: 15.5mm x 11.5mm
I2C Address: 0x76 or 0x77 (Adjustable via SDO pin)
Installation Tip from Robogears To get started with an Arduino, we recommend the Adafruit BMP280 Library. Connect the sensor to the I2C bus (SDA/SCL). Most modules come with an onboard 3.3V regulator, so you can power them from the 5V pin, but ensure your logic levels are compatible. If the sensor is not detected at address 0x77, try 0x76 (the SDO pin determines the address). For altitude calculations, remember that the "altitude" is derived from pressure; for the most accurate results, you must calibrate the code with the local sea-level pressure (QNH) from your nearest airport or weather station.
Note: This product is the BMP280 Sensor Module ONLY. Header pins may be included but not soldered. Product images are for illustration purposes only.