NodeJS Module for the UDOO BRICK Barometer (UDOO NEO)

Node.js module for retrieving data from the barometer brick for the UDOO Neo. Gets atmospheric pressure in pascals, temperature in kelvin and altitude in meters.

A note on altitude: the value is derived from measured temperature, measured atmospheric pressure and a fixed atmospheric pressure at sea level (P0, 1013.25 hPa). P0 could be different at your location, so the calculed altitude might not be accurate.

Important: this modules uses ES2015 (ES6) features, so use a modern version of node.js (v4.x, v5.x etc)

Installation

// In a local project
npm install --save neo-barometer
// For global usage
npm install -g neo-barometer

Usage (cli)

When installed globally, the module installs four cli tools in your PATH:

• altitude : outputs altitude in meter to stdout

• pressure [--unit hpa] : outputs pressure in pascal to stdout . Change unit with flag --unit [hpa|kpa|pa]

• temperature [--unit celcius] : outputs temperature in Kelvin to stdout . Change unit with flag --unit [c|celcius|f|fahrenheit|K|Kelvin]

• barometer : outputs all values in stringified JSON to stdout

Usage (module)

The module exports four Readable Streams:

• barometer.Temperature : a stream of temperature values in degrees celcius.

• barometer.Pressure : a stream of atmospheric pressure values in pascals.

• barometer.Altitude : a stream of altitude values in meters.

• barometer.Compound : a stream of objects that contain all three values (temperature, pressure & altitude).

let barometer = require('neo-barometer');
// 1. Just temperature
let temperature = new barometer.Temperature();
temperature.on('data', console.log.bind(console));
temperature.on('error', console.error.bind(console));
// 2. Just pressure 
let pressure = new barometer.Pressure();
pressure.on('data', console.log.bind(console));
pressure.on('error', console.error.bind(console));
// 3. Just altitude
let altitude = new barometer.Altitude();
altitude.on('data', console.log.bind(console));
altitude.on('error', console.error.bind(console));
// 4. Compound (all values)
let compound = new barometer.Compound();
compound.on('data', console.log.bind(console));
compound.on('error', console.error.bind(console));