BME280 Temperature, Humidity, and Pressure Sensor Module

The BME280 Temperature, Humidity, and Pressure Sensor Module is a high-precision environmental sensor developed by Bosch, designed to measure temperature, humidity, and barometric pressure all in a single ultra-compact package. Combining high accuracy with low power consumption, it is an ideal upgrade from basic sensors like the DHT11 or BMP180. Featuring both I2C and SPI interfaces, this versatile module is widely used in smart home automation, weather stations, IoT projects, and altitude tracking applications.

Key Features

• 3-in-1 sensor: measures temperature, humidity, and barometric pressure
• High precision and low power consumption
• Supports both I2C and SPI communication interfaces
• Capable of calculating altitude based on atmospheric pressure
• Compact footprint perfect for space-constrained projects
• Wide operating range for versatile environmental monitoring
• Easy to interface with Arduino, ESP8266, ESP32, and Raspberry Pi

Technical Specifications

Applications

• DIY weather stations and environmental monitoring
• Smart home automation and HVAC control
• Altitude and vertical speed measurement for drones
• Indoor navigation and GPS augmentation
• IoT connected weather nodes (ESP8266/ESP32)
• Greenhouse and agricultural monitoring systems

Important Notes

• The BME280 is natively a 3.3V device. If using a 5V microcontroller (like a standard Arduino Uno), use a logic level converter for the I2C/SPI lines or ensure your breakout board has an onboard regulator and level shifting.
• Ensure you are using the correct I2C address (0x76 or 0x77) in your code, as it depends on the configuration of the SDO pin on the module.
• Avoid exposing the sensor to direct sunlight, water, or extreme condensation, as this can permanently affect the humidity readings.
• Keep the sensor away from heat-generating components (like voltage regulators) on your PCB to ensure accurate temperature readings.
• For altitude calculations, you must provide the current sea-level pressure for your location in your code.