#IoTBE session about Javascript programming on Linux-based systems. Talking about Node.JS, Node-RED, CylonJS, Johnny-five.io

1. BAREMETALJAVASCRIPT
C o n n e c t e d s o l u t i o n s & d i g i t a l s e r v i c e s
Frederik Vannieuwenborg – 29/10/2015
IN LINUX
& GPIO PROGRAMMING

2. WHO AM I?
Frederik Vannieuwenborg
Technical Partner Aptus
Media & Communication Technology
Zwevegem
@vannieuwenborgf

3. What we do?
We combine hardware (electronics) and software (embedded software, cloud, mobile and web
applications) with connectivity solutions to help connect devices and people and processes.
HARDWARE
PROTOTYPE
WIRELESS COMM.
ELECTRONICS
MICROCONTROLLER
A BRIDGE BETWEEN THE PHYSICAL
AND DIGITAL WORLD
INTERACTION BETWEEN INTERNET,
THINGS AND DATA
DATA
Internet
Things
CLOUD
BIG DATA
EMBEDDED
SOFTWARE
MOBILE APPS
HTML5/CSS3/JS

4. DEVICES & MACHINES
ENVIRONMENTS
PEOPLE

5. Sensor networks
Indoor positioning
LPWAN
Wearables
RFID/NFC

6. BARE METAL
JAVASCRIPT

7. It’s all about using JavaScript
on micro-controller boards or
single-board computers

8. Agenda
NodeJS FrameworksHardware Frameworks FrameworksDemo

10. - Server-side JavaScript runtime
- Built on Chrome's V8 JavaScript engine
- Non-blocking I/O
- Single threaded
- Event driven
- Async
Node.js

12. BlockingI/O

13. Non-blockingI/O

14. var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello Worldn');
}).listen(1337, "127.0.0.1");
console.log('Server running at http://127.0.0.1:1337/');
Basic examples
var fs = require('fs');
fs.readFile(‘somefile.txt', 'utf8', function(err, contents) {
console.log(contents);
});

15. Application JavaScript Code
Node.js JavaScript built-in library
Node.js C++ Layer
libuv OpenSSL zlib c-ares
The Node.jsinternals

16. The Node.jssystem
APPLICATION
V8
(JAVASCRIPT ENGINE)
NODE.JS
BINDINGS
(NODE API)
JAVASCRIPT
OS
OPERATION
LIBUV
(ASYNCHRONOUS I/O)
EVENT
QUEUE
WORKER
THREADS
FILE SYSTEM
NETWORK
PROCESS
EVENT
LOOP
BLOCKING
OPERATION
EXECUTE
CALLBACK

17. Don’tuse Node.js for…
- CPU intensive tasks
- Long running CPU tasks will block the whole server
- File-processing
- Multi-threaded processing
- You can run multiple Node processes running in
parallel though

18. Command line utility to install Node.js packages, do version
management and dependency management of Node.js packages.

19. HARDWARE

20. IntelEdison

21. IntelEdison
- 32-bit Intel® Atom™ Processor @ 500 MHz
- 1 GBRAM LPDDR3 memory
- 4 GB storage
- Wireless Dual-band (2.4 and 5 GHz) & Bluetooth
- Connector 70-pin Hirose
- USB 2.0 1 OTG controller
- I/O 40 general purpose GPIO
- 4 capable of PWM

23. IntelEdison – Arduino breakout Kit

24. IntelEdison – Sparkfun block

27. // Load Grove module
var groveSensor = require('jsupm_grove');
// Create the button object using GPIO pin 0 var
button = new groveSensor.GroveButton(0);
// Read the input and print, waiting one second
between readings
function readButtonValue() {
console.log(button.name() + " value is " +
button.value());
}
setInterval(readButtonValue, 1000);

28. var LEDBar = require("jsupm_my9221");
var myLEDBar = new LEDBar.MY9221(2, 3);
var directionBool = true;
var myInterval = setInterval(function() {
show_LED(1, directionBool);
}, 1000 );
function show_LED(level, direction) {
if (level <= 10) {
myLEDBar.setBarLevel(level, directionBool);
setTimeout(show_LED, 50, ++level, directionBool);
} else directionBool = !directionBool;
}
process.on('SIGINT', function() {
myLEDBar.setBarLevel(0, true);
clearInterval(myInterval);
console.log("Exiting..."); process.exit(0);
});

29. var groveSensor = require('jsupm_grove'); var
led = new groveSensor.GroveLed(2);
console.log(led.name());
var i = 0;
var waiting = setInterval(function() {
if ( i % 2 == 0 ) {
led.on();
} else {
led.off();
} i++;
if ( i == 20 ) clearInterval(waiting);
}, 1000);

30. Tessel.io

31. Tessel.io
- 2 Module ports
- 2 USB ports
- Wifi & Ethernet
- 580MHz Mediatek MT7620n
- 64 MB RAM & 32 MB Flash
- 48MHz Atmel SAMD21 co-
processor
- microUSB

35. Beaglebone black

36. Beaglebone black
- Produced by Texas Instruments in association with Digi-
Key and Newark element14
- AM335x 1GHz ARM® Cortex-A8 & 512MB DDR3 RAM
- 4GB 8-bit eMMC on-board flash storage
- 3D graphics accelerator
- 2x PRU 32-bit microcontrollers
- USB client host
- Ethernet & HDMI
- 2x 46 pin headers

37. Beaglebone black
- Debian
- Android
- Ubuntu
- Cloud9 IDE on Node.js w/ BoneScript library
BoneScript is a Node.js library specifically optimized
for the Beagle family and featuring familiar Arduino
function calls, exported to the browser.

38. Cloud9IDE

39. http://elinux.org/Beagleboard:BeagleBone_Capes

40. Raspberry PI

41. Raspberry PI
- Low cost credit-card sized computer
- 900MHz quad-core ARM Cortex-A7 CPU
- 1GB RAM
- 4 USB ports
- Full HDMI port, Ethernet port
- Combined 3.5mm audio jack and composite video
- Camera interface (CSI) & Display interface (DSI)
- Micro SD card slot
- VideoCore IV 3D graphics core

42. Raspberry PI
- Default: Debian
- The Raspberry Pi Internet of Things Framework
- http://webiopi.trouch.com/
- The ThingBox Project
- Use Internet of Things technologies without any
technical knowledge and for free
- http://thethingbox.io/

45. FRAMEWORKS

47. var five = require("johnny-five");
var board = new five.Board();
board.on("ready", function() {
// Create a standard `led` instance
var led = new five.Led(13);
// "blink" the led in 500ms
led.blink(500);
});
*The JavaScript program is executed on a host machine that runs node.js

48. Cylon.js is a JavaScript framework for robotics,
physical computing, and the Internet of Things. It
makes it incredibly easy to command robots and
devices.

49. Cylon.js
- Connects 36 platforms
- Raspberry PI, Arduino, Pebble, …
- Drivers for General Purpose
Input/Output hardware
- LED, buttons, sensors, …
- Node based

50. Cyclon.js - demo
- Push button
- Log “Push button”
- Toggle LED
- Run “ToggleLed”
- Log “ToggleLed”
- Toggle LED

51. Node-RED is a tool for wiring together hardware
devices, APIs and online services in new and
interesting ways.

52. http://flows.nodered.org/
Node-REDflows

53. De geldfretter

54. Architectuur
Raspbian
NodeJS
Node-RED
LDR
LED
SERVO

55. Node-REDinstallation
http://nodered.org/docs/hardware/raspberrypi.html
*No support for node 4.x
curl -sL https://deb.nodesource.com/setup_0.12 | sudo bash
DOWNLOAD INSTALL SCRIPT
sudo apt-get install -y build-essential python-dev python-rpi.gpio nodejs
INSTALLATION
nodejs
START NODEJS
npm cache clean
sudo npm install -g node-red
INSTALL NODE-RED
sudo node-red
START NODE-RED

56. http://pi.gadgetoid.com/pinout
Raspberry PI – I/O Pinout

57. Light-EmittingDiode

58. Light-dependent resistor (LDR)

59. Servo

60. Servo for dummies

61. T’ligtgeldip,incaseern zeggek! (hands-on)

62. OH..
ONE MORE THING

63. Help us,we need your support!

64. Aptus HQ
Veldkant 33b
2550 Kontich
Aptus Offices
Stedestraat 51
8530 Harelbeke
Frederik Vannieuwenborg
http://twitter.com/WeAreAptus
http://www.aptus.be
Let’s talk!