The JS of things

Firefox OS

Mobile platforms, wearable devices, IoT

Valentin Goșu

about:me

Open Source enthusiast

C++ developer by day

Firefox OS hacker by night

Mozilla Rep in Bucharest

http://google.com/+ValentinGosu

valentin@mozilla.ro

Firefox OS

Gaia (collection of web apps that make up the UI)

Gecko (JS Runtime, APIs for hardware access)

Gonk (Linux Kernel, Drivers, HAL)

WebAPI

Battery

Orientation

Vibration

Alarm

Notification

https://developer.mozilla.org/en-US/docs/WebAPI

Camera

SMS

Telephony

Bluetooth

Wifi

TcpSocket

Contacts

Storage

Apps

WebPayment

DEMO

Simple Firefox OS app

WebIDE

Apps

Normal/Web

Privileged

Certified

Firefox as a runtime for your apps

https://marketplace.firefox.com/

Kickstart your IoT project

1 - low cost

2 - easy development

This part of the presentation is based on http://janos.io/ by Jan Jongboom

Cost

Raspberry Pi - 35$

Wifi - 10$

Flash - 5$

Battery - 20$

Wires & Cables - 5$

Screen - 30$

3G?

Camera?

Bluetooth?

Speaker?

Sensors?

Cost

https://firefoxosdevices.org

25$

dual sim (GSM) ✓

bluetooth 4.0 ✓

Wi-Fi ✓

camera ✓

battery ✓

touchscreen ✓

Easy development

1 - Flash JanOS (Stripped down FirefoxOS)

2 - Buy a screwdriver

3 -

JanOS DEMO

Included:

- doorbell

- motion

- security camera

- GPS tracker

How easy is it?

function start() {
    // Call the phone number
    navigator.mozTelephony.dial('07XXXXXXXX');
    // Stop the call in 63 seconds
    setTimeout(stop, 63*1000);
}

function stop() {
    // Hang up
    navigator.mozTelephony.calls[0].hangUp();
    // Call back again in another 3 seconds
    setTimeout(start, 3*1000);
}

start();

How easy is it?

window.camera.takePicture('back').then(function(ev) {
  var blob = ev.blob;
  // Store blob in storage 
}

// WebRTC

navigator.geolocation.getCurrentPosition(
  function(position) {
  // position.coords.latitude
  // position.coords.longitude
});

var request = navigator.mozAlarms.add(
  new Date("May 21, 2015 16:20:00"));
navigator.mozSetMessageHandler("alarm", 
  function (mozAlarm) { alert("alarm fired"); });

Extra goodies

navigator.mozOs.exec('ls', [ '-al', '/data/local' ])
  .then(res => console.log('exec', res.exitCode, res.stdout, res.stderr))
  .catch(err => console.error('exec failed', err));

http://janos.io/api-reference/exec.html

navigator.mozOs.readFile('/data/local/user.js', 'utf-8')
  .then(content => console.log('readFile', content))
  .catch(err => console.error('readFile', err));

http://janos.io/api-reference/fs.html