MPL115A2

A node.js module for reading Adafruit's Freescale MPL115A2 I2C Barometric Pressure/Temperature Sensor sensor using i2c.

It is base on the bmp085 node.js module (https://github.com/fiskeben/bmp085) and the MPL115A2 espruino module (http://www.espruino.com/MPL115A2).

Install

$ npm install mpl115a2

Raspberry Pi users: Remember to enable i2c on your Pi if you haven't done already.

Also remember to use sudo when running your program if you haven't exported your GPIO pins to user space.

Usage

The module's read function takes a callback function as an argument. The callback will receive an object with the temperature (in degrees Celcius) and air pressure (in hPa).

Example:

var MPL115A2 = require('mpl115a2');
var barometer = new MPL115A2();

barometer.calibrate(function() {
  console.log('calibrated');
  barometer.read(function (data) {
    console.log("Temperature: " + data.t + "C");
    console.log("Pressure: " + data.p + "kPa");
  });
});

Configuration

Configure the sensor by supplying an options object to the constructor:

new MPL115A2(
    {
        'mode': 1,
        'address': 0x60,
        'device': '/dev/i2c-1'
    }
);