The SparkFun BME280 Atmospheric Sensor Breakout measures barometric pressure, humidity, and temperature in a compact package. Whether you're building a weather station, home automation system, or indoor air quality monitor, this sensor covers all the key atmospheric conditions.

The breakout provides both a 3.3 V SPI interface and a 5 V tolerant I²C interface (with pull-up resistors to 3.3 V). It draws less than 1 mA during measurements and idles at less than 5 µA, making it well suited for battery-powered projects.

Key Features

• Three-in-One Sensor – Pressure, humidity, and temperature from a single IC
• Pressure Range – 30 kPa to 110 kPa (relative accuracy ±12 Pa, absolute ±100 Pa)
• Humidity Range – 0–100% RH (±3% accuracy between 20–80% RH)
• Temperature Range – −40 °C to +85 °C
• Altitude Accuracy – ±1 m relative at sea level
• Dual Interface – I²C (5 V tolerant) and SPI (3.3 V)
• Ultra-Low Power – Less than 1 mA active, less than 5 µA idle

Ideal For

• Weather stations and environmental monitoring
• Indoor/outdoor navigation and altitude sensing
• Home automation and HVAC systems
• Personal health and wellness tracking

Package Contents

• 1× SparkFun BME280 Atmospheric Sensor Breakout

Resources

• BME280 Datasheet (PDF)
• Hookup Guide
• Arduino Library (GitHub)
• Schematic (PDF)
• Design Files (GitHub)