GY-BME280 Temperature Humidity Pressure Sensor Module

The GY-BME280 is a small, ready-to-use environmental sensor module built around the Bosch BME280, a popular digital sensor for temperature, humidity and atmospheric pressure measurement. Unlike basic temperature-only sensors, this module gives three useful environmental parameters from one compact board, making it ideal for weather monitoring, indoor air condition tracking, IoT dashboards and battery-powered embedded projects. The BME280 sensor is factory calibrated and outputs digital data, so your microcontroller does not need analog signal conditioning. The module can communicate through I2C for simple two-wire wiring or SPI for applications that need a dedicated bus. In I2C mode, it is widely supported by Arduino, ESP32, ESP8266, STM32, Raspberry Pi and many development platforms using common BME280 libraries. Typical I2C addresses are 0x76 or 0x77 depending on the SDO pin configuration. This GY-BME280 breakout module is valued by electronics hobbyists and engineers because it combines good accuracy, low power consumption at the sensor level and a very small footprint. The pressure reading can be used to estimate altitude changes, while humidity and temperature readings help in comfort monitoring, greenhouse automation, storage monitoring and HVAC-related experiments. The pressure range of 300 to 1100 hPa covers normal atmospheric applications, and the humidity range supports 0 to 100% RH sensing. Pin notes: common GY-BME280 boards provide VCC, GND, SCL/SCK, SDA/SDI, CSB and SDO pins. For I2C, connect VCC, GND, SCL and SDA; CSB is typically kept high and SDO selects the I2C address. For SPI, use SCK, SDI, SDO and CSB along with power pins. Package includes one GY-BME280 temperature humidity pressure sensor module; header pins may be supplied separately depending on stock batch.