intel-joule-blynk.js

#!/usr/bin/env node

/*
  1. Install Blynk App for iOS and Anrdoid
  2. Login or Create new account in the Blynk App
  3. Add project by scanning this QR:
     
     http://tiny.cc/joule-blynk
     
  4. Send Auth Token to your email, and update AUTH variable in this sketch
  5. On the board, install Blynk library and run this script
  
     # npm install -g blynk-library
     # chmod a+x intel-joule-blynk.js
     # ./intel-joule-blynk.js

*/
var AUTH = 'Your Auth Token';

var BlynkLib = require('blynk-library');
var blynk = new BlynkLib.Blynk(AUTH);


// Terminal widget
var log = new blynk.WidgetTerminal(0);

blynk.on('connect', function() {
  log.write("Blynk started on Joule 570x\n");
});


// Stress test button
var v1 = new blynk.VirtualPin(1);
const exec = require('child_process').exec;

var m = require('mraa');
var myLed = new m.Gpio(103);
myLed.dir(m.DIR_OUT);

v1.on('write', function(param) {
  if (param[0] == 1) {
    log.write("Heat ON\n");
    myLed.write(1);
    for (var i = 0; i < 4; i++) {
      exec('sha1sum /dev/zero');   // Simulate load
    }
  } else {
    log.write("Heat OFF\n");
    myLed.write(0);
    exec('killall sha1sum');       // Kill load
  }
});


// Update 2 temperature plots every 3 seconds
var v2 = new blynk.VirtualPin(2);
var v3 = new blynk.VirtualPin(3);
var fs = require('fs');

setInterval(function() {
  var t = fs.readFileSync('/sys/class/thermal/thermal_zone5/temp', 'utf8');
  t = parseInt(t)/1000;
  v2.write(t);

  t = fs.readFileSync('/sys/class/thermal/thermal_zone2/temp', 'utf8');
  t = parseInt(t)/1000;
  v3.write(t);
}, 3000);