BMP280 I2C IIC Digital Atmospheric Pressure, Temperature, Altitude Sensor

May 17, 2024

What is the BMP280?

The BMP280 I2C IIC Digital Atmospheric Pressure, Temperature, and Altitude Sensor is a high-precision component popular in Raspberry Pi, Arduino, and DIY projects. It provides accurate measurements of atmospheric pressure, temperature, and altitude, making it ideal for applications such as weather stations, drones, and GPS systems. With its pre-soldered pins, the BMP280 is ready for immediate use, offering quick and hassle-free integration into various projects.

Purchase BMP280 on ShillehTek

Operating Mechanisms of the BMP280

The BMP280 operates by utilizing its integrated sensors to measure atmospheric pressure, temperature, and altitude with high precision. Here's a breakdown of its operating mechanisms:

Pressure Measurement: The BMP280 measures atmospheric pressure in the range of 300 to 1100 hPa. This data can be used to calculate altitude, making it ideal for applications such as weather stations and altimeters.
Temperature Measurement: The BMP280 measures temperature in the range of -40 to 80℃, providing accurate environmental data for various applications.
Altitude Calculation: By converting pressure readings to altitude, the BMP280 is perfect for GPS applications and drones, providing reliable altitude data.
Pre-Soldered Convenience: The ShillehTek BMP280 comes with pre-soldered pins, eliminating the need for soldering skills or additional equipment. This user-friendly design saves time and effort, making it accessible for both beginners and experienced users.
Communication Interface: The BMP280 communicates with microcontrollers via the I2C or SPI interface, allowing for easy integration with devices like Raspberry Pi, Arduino, and ESP32.

By combining these mechanisms, the BMP280 provides a comprehensive solution for environmental sensing, making it an essential component in many modern electronic projects.

Pins

BMP280 Pinout

VCC (Power Supply: +3.3V)

This pin is used to supply power to the BMP280. The sensor operates at 3.3V.
Connection: Connect this pin to the 3.3V power supply from your microcontroller or development board.

GND (Ground)

This pin is the ground connection for the sensor. It should be connected to the ground of your power supply or microcontroller.
Connection: Connect this pin to the ground (GND) of your microcontroller or development board.

SCL (Serial Clock)

This pin is used for the I2C clock signal. It synchronizes the data transfer between the BMP280 and the microcontroller.
Connection: Connect this pin to the I2C clock pin (SCL) on your microcontroller.

SDA (Serial Data)

This pin is used for the I2C data signal. It is used for bidirectional data transfer between the sensor and the microcontroller.
Connection: Connect this pin to the I2C data pin (SDA) on your microcontroller.

CSB (Chip Select)

This pin is used for SPI communication. It selects the device when multiple devices share the same SPI bus.
Connection: Connect this pin to the SPI chip select pin (CS) on your microcontroller.

SDO (Serial Data Out)

This pin outputs the serial data from the BMP280 sensor. It is crucial for SPI communication, as it sends data from the BMP280 to your microcontroller. Connection: Connect this pin to the Master In Slave Out (MISO) pin on your microcontroller to ensure proper data flow and synchronization during SPI communication.

Technical Specifications

Specification	Details
Temperature Range	-40 to 80℃
Temperature Accuracy	±1℃
Pressure Range	300 to 1100 hPa
Pressure Accuracy	±1 hPa
Altitude Calculation	Yes, based on pressure readings
Power Supply	3.3V
Output Signal	Digital (I2C and SPI)
Dimensions	2.0 x 2.5 x 0.93mm