JavaScript losant-mqtt Device Examples

Example #1

File: basic.js Project: Losant/losant-mqtt-js

setInterval(function() {

  // Report state to Losant.
  if(device.isConnected()) {
    device.sendState({ key: 'value' });
  }

}, 1000);

Example #2

File: intel-edison.js Project: Losant/losant-mqtt-js

setInterval(function() {

  // Turn on the LED.
  led.write(1);

  // Read temp voltage and convert.
  var tempRaw = temp.read();
  var degreesC = (((tempRaw / 1024) * 5) - 0.52) * 100;
  var degreesF = degreesC * 1.8 + 32;

  console.log(degreesC);
  console.log(degreesF);

  // Report state to Losant.
  device.sendState({ temp: degreesF });

  // Wait a little and turn off the LED.
  setTimeout(function() { led.write(0); }, 500);

}, 1000);

Example #3

File: index.js Project: Losant/example-raspberry-pi

board.on('ready', function() {

  var led = new five.Led('P1-7')
  var button = new five.Button({
    pin: 'P1-11',
    isPullup: true
  });

  button.on('down', function() {
    console.log('Button pressed')
    // When the button is pressed, send the state to Losant.
    device.sendState({ button: true });
  });

  // Listen for commands from Losant.
  device.on('command', function(command) {
    console.log('Received a command: ' + command.name)
    if(command.name === 'toggle') {
      led.toggle();
    }
  });
});

Example #4

File: intel-edison.js Project: Losant/losant-mqtt-js

 /* eslint no-console: "off"*/

var mraa = require('mraa');
var Device = require('losant-mqtt').Device;

// Reading temperature from analog input.
var temp = new mraa.Aio(0);

// Blinking an LED everytime temperature is read.
var led = new mraa.Gpio(7);
led.dir(mraa.DIR_OUT);

// Construct a device instance.
var device = new Device({
  id: 'my-device-id',
  key: 'my-access-key',
  secret: 'my-access-secret'
});

// Connect device to Losant.
device.connect();

// Attach event listener for commands.
device.on('command', function(command) {
  console.log(command.name);
  console.log(command.payload);
});


// Once a second, read the temp and report to Losant.
setInterval(function() {

Example #5

File: index.js Project: Losant/example-raspberry-pi

 button.on('down', function() {
   console.log('Button pressed')
   // When the button is pressed, send the state to Losant.
   device.sendState({ button: true });
 });

Example #6

File: index.js Project: Losant/example-raspberry-pi

var five = require('johnny-five');
var raspi = require('raspi-io');
var Device = require('losant-mqtt').Device;

// Construct Losant device.
var device = new Device({
  id: 'my-device-id',
  key: 'my-access-key',
  secret: 'my-access-secret'
});

// Connect the device to Losant.
device.connect();

var board = new five.Board({
  io: new raspi()
});

board.on('ready', function() {

  var led = new five.Led('P1-7')
  var button = new five.Button({
    pin: 'P1-11',
    isPullup: true
  });

  button.on('down', function() {
    console.log('Button pressed')
    // When the button is pressed, send the state to Losant.
    device.sendState({ button: true });
  });