LinkNode Pressure Sensor Module

Introduction

The module provides precise measurement of barometric pressure and temperature in the environment. The air pressure can be measured in a range from 300 hPa to 1100hPa with ±1.0 hPa absolute accuracy. As for the temperature the sensor works perfectly For temperatures between - 40 and 85 with an accuracy of ±1. Owing to its high accuracy on measuring the pressure, and the pressure changes with altitude, we can calculate the altitude with ± 1 meter accuracy, which makes it a precise altimeter as well.

Specification

• Supply Voltage: 3.3V

• Barometric Pressure Measure

• • Range: 300 – 1100 hPa

• • Accuracy: ±1.0 hPa

• Temperature Measurement

• • Range: -40 to 85

• • Accuracy: ±1

• Interface: I2C

• Dimensions: 20mm x 20mm

Wiring

The module is connected to the base shield J3 or J10/J11/J12 (IIC Interface) :

Sensor IIC --> LinkNode D1 IIC

IIC address settings (SJ1) :

Short G : 0x76 (default)

Short V : 0x77

Install Library

* download library : Adafruit_BMP280.rar

Place the BMP280 library folder your ”arduinosketchfolder/libraries/ folder”.

Load Demo

Open “File->Examples->Adafruit_BMP280_Library->bmp280test” and upload to your LinkNode D1, Open the Arduino IDE serial monitor ( BAUD 9600 ) to see sensor data output.

Datasheet

BST-BMP280-DS001-11.pdf