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GY-BME280 Pressure, Humidity & Temperature Sensor Module — I2C / SPI
The GY-BME280 is a compact environmental sensor module based on the Bosch BME280 chip, measuring barometric pressure (±1hPa), relative humidity (±3%RH), and temperature (±1°C) simultaneously via I2C or SPI. The GY-series PCB includes voltage regulation and level shifting for direct 3.3V or 5V operation with Arduino, ESP32, and Raspberry Pi.
Key Specifications
- IC: Bosch BME280 | Interface: I2C (0x76/0x77) & SPI
- Pressure: 300–1100hPa, accuracy ±1hPa
- Humidity: 0–100%RH, accuracy ±3%RH
- Temperature: −40–85°C, accuracy ±1°C
- Supply voltage: 3.3–5V | Current: 3.6μA (1Hz sampling)
- Compliance: RoHS compliant
Why Choose This?
- ✅ 3-in-1 sensor — pressure + humidity + temperature in one module
- ✅ On-board voltage regulator — direct 3.3V or 5V operation
- ✅ I2C and SPI — flexible interface for any microcontroller
- ✅ Adafruit BME280 library — extensive Arduino community support
Typical Applications
- Arduino and ESP32 weather station
- Indoor air quality and HVAC monitoring
- Altitude measurement for drones and balloons
- IoT environmental monitoring nodes

