M5Stack Barometric Pressure Unit BMP280 Sensor Module w/ Grove Cable

The module uses the I2C communication protocol, accessible via its included Grove connector. This standard 4-pin interface simplifies wiring to compatible development boards like the M5Stack Core, ESP32, and Arduino Uno with a Grove shield. The sensor's I2C address is configurable.

The unit's high relative pressure accuracy of ±0.12 hPa translates to an altitude estimation resolution of approximately ±1 meter under stable atmospheric conditions. Accuracy for absolute altitude depends on a known reference SEA-level pressure, but the sensor is excellent for tracking relative height changes in applications like drones or wearables.

Yes, the Bosch BMP280 sensor is designed for ultra-low power consumption. In normal mode at a 1 Hz sampling rate, it draws only 2.7 µA. It also supports sleep and forced measurement modes, allowing the host microcontroller to wake the sensor, take a reading, and return it to sleep, maximizing battery life in portable applications.

The on-chip temperature sensor is essential for compensating the pressure readings, as the BMP280's pressure measurement is temperature-sensitive. This internal compensation ensures high accuracy and low drift (1.5 Pa/K) across the full -40°C to +85°C operating range. The temperature data is also available for logging or environmental monitoring.