The BME280 Sensor Module is a compact, high-performance digital sensor that measures temperature, relative humidity, and barometric pressure in one board. It’s a popular upgrade over basic sensors because it provides stable digital readings and pressure data that can be used for weather trend monitoring and altitude estimation (relative altitude changes based on pressure).
This module supports both I2C and SPI communication, making it easy to connect to a wide range of platforms including Arduino (with proper level shifting if needed), ESP32, and Raspberry Pi. It’s ideal for DIY projects such as weather stations, indoor air monitoring, portable environmental loggers, drones/robots (altitude/pressure), and smart home automation.
Most BME280 modules expose pins such as VCC, GND, SCL, SDA (I2C) and may also include CS, SDO, SDI/SDA for SPI. Some boards include a regulator/level shifting, while others are 3.3V-only.
Important: The BME280 sensor IC typically operates at 1.8V–3.6V. Many modules are intended for 3.3V logic. If your board is a 3.3V-only module, avoid direct 5V logic signals unless the module includes level shifting.
| Item | Typical Value |
|---|---|
| Sensor | BME280 |
| Measurements | Temperature, Humidity, Pressure |
| Interface | I2C / SPI |
| Operating Voltage (Sensor IC) | 1.8V–3.6V |
| Best Logic Level | 3.3V |
| Use Cases | Weather station, altimeter, IoT monitoring |
Note: Accuracy and voltage behavior depend on the specific module version (with/without regulator and level shifting).
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