JavaScript on Hardware

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# JavaScript on Hardware

Michael Jaser 
 Peerigon GmbH 
 [@mmeaku](https://twitter.com/mmeaku)

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 ## Internet of Shit
 
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 <blockquote class="twitter-tweet" data-lang="de">I might not be going Mars or be one of the world's best science educators, but I did make a drone hair cutter, so I've got that going for me <a href="https://t.co/uILXYSb1Vi">pic.twitter.com/uILXYSb1Vi</a>— Simone Giertz (@SimoneGiertz) <a href="https://twitter.com/SimoneGiertz/status/821461426141204480">17. Januar 2017</a></blockquote>
 
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 <img src="assets/electric-toothbrush.png" style="height: 60vh" /> 
 
 Source: <a href="https://oralb.com/en-us/product-collections/bluetooth" >https://oralb.com/en-us/product-collections/bluetooth</a>
 
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 ## Why JavaScript on Hardware?
 
 - ~~JavaScript~~ Ruby / Python / Go / Lua... 
 - stop dealing with language issues (C/C++)
 - focus on hardware and interaction 
 
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 ## Espruino Pico
 
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 <img src="assets/pico.jpg" />
 
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 ## Spec
 
 - 32-bit, 84MHz ARM Cortex M4 CPU
 - 96kb RAM, 384kb flash
 - 22 GPIO pins : 9 Analog inputs, 21 PWM, 2 Serial, 3 SPI, 3 I2C
 - USB Type A connector
 - 2x on-board LEDs, 1x button.
 - Current draw in sleep: < 0.05mA - over 2.5 years on a 2500mAh battery
 - [30 €](https://shop.pimoroni.de/products/espruino-pico)
 
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 ## Hardware 
 
 <img src="assets/ws-led.jpg" style="height: 20vh;" /> 
 
 - WS2801
 - addressable RGB LED
 - speaks 1-Wire / SPI 
 - chainable
 - < 3 €
 
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 ## Ultrasonic distance sensor
 
 <img src="assets/hc-sr04.jpg" style="height: 20vh;" />
 
 - HC-SR04
 - 2cm - 400cm range 
 - ~3 €
 
 Source: <a href="https://www.sparkfun.com/products/13959">https://www.sparkfun.com/products/13959</a>
 
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 ## Demo
 
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 ## Raspberry Pi 
 
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 <img src="assets/raspi3.png" />
 By <a href="//commons.wikimedia.org/w/index.php?title=User:Herbfargus&action=edit&redlink=1" class="new" title="User:Herbfargus (page does not exist)">Herbfargus</a> - Own work, <a href="http://creativecommons.org/licenses/by-sa/4.0" title="Creative Commons Attribution-Share Alike 4.0">CC BY-SA 4.0</a>, <a href="https://commons.wikimedia.org/w/index.php?curid=47497384">Link</a>
 
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 ## Raspberry Pi 3
 
 - 64-bit 1.2GHz quad-core ARMv8 CPU
 - 1GB RAM
 - 40 GPIO pins
 - Ethernet port
 - 802.11n Wireless LAN
 - Bluetooth 4.1
 - Bluetooth Low Energy (BLE)
 - 4 USB ports
 - 800 mA
 - ~44 € 
 
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 ## Raspberry Pi zero
 
 - 32-bit, 1Ghz, Single-core CPU
 - 512MB RAM
 - Mini HDMI and USB On-The-Go ports
 - Micro USB power
 - 40 GPIO pins
 - ~160 mA
 - ~5 €
 
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 ## Setup 
 
 - Raspbian 
 - Node.js 7.x 
 - [johnny-five](http://johnny-five.io)
 
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 ## Johnny Five 
 
 ```javascript
 const five = require("johnny-five");
 const board = new five.Board();
 
 board.on("ready", function() {
 const led = new five.Led(13);

// "blink" the led in 500ms
 // on-off phase periods
 led.blink(500);
 });
 ```
 
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 ## Johnny Five 
 - Node.js module for hardware interaction
 - runs in [tethered mode](http://johnny-five.io/platform-support/#relationship:host-client) on _Arduinos_ and most clones
 - runs in [standalone mode](http://johnny-five.io/platform-support/#relationship:embedded) on _Tessel_, _BeagleBone_, _Intel Galileo_,...
 
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 ## Hardware
 
 <img src="assets/multi-sensor.png" style="width:20vw" />
 
 - MPL3115A2
 - reads temperature, pressure and altitude 
 - ~10 €
 
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 # Demo
 
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 ## Conclusion 
 
 - Hardware hacking is fun! 
 - it's easy if you stick with "standard" components
 - start with a language you're comfortable with
 
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 ## Thank you
 
 - michael.jaser@peerigon.com
 - @mmeaku on Twitter 
 
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## Links
    
    - http://www.espruino.com/
    - https://www.raspberrypi.org/
    - [Gordon Williams: JavaScript for Microcontrollers with Espruino](https://www.youtube.com/watch?v=hSyXpM1L4B4)
    - [Sayanee Basu: Alice in Hardware Land - JavaScript models of interaction with the physical world](https://www.youtube.com/watch?v=pPBTNKXm7k8)