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When Porgs Scream at Webpack and other stories CascadiaJS - Dominik Kundel d-k.im/cascadia Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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How many of you have a microcontroller? Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Did you use it? Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs console.log(` Hi! I’m Dominik Kundel `); dkundel.com @dkundel dkundel@twilio.com github/dkundel Developer Evangelist !&& JavaScript Hacker

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs I JavaScript

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What about Hardware? Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs The Destiny of Hardware

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Simple LED demos Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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It's not easy Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Preparation Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Costly Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs No ⌘ + Z / Ctrl+Z

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs Rewarding

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C/C++ Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs C/C++ ???

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs Three ways to combine JavaScript & Hardware

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1. APIs & Protocols JavaScript 㱺 API 㱺 C/C++ 㱺 Hardware Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs APIs & Protocols Option 1 Dedicated APIs For example Particle Cloud API

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Particle Cloud API Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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What is Particle? ▶ IoT hardware manufacturer ▶ Device management platform ▶ Provides API to interact with deployed devices Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Particle Cloud API Example Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs curl https:!//api.particle.io/v1/devices/0123456789abcdef/brew \ -d access_token=123412341234 \ -d "args=coffee" void setup() { !// register the cloud function Particle.function("brew", brewCoffee); } int brewCoffee(String command) { if(command !== "coffee") { return 1; } else return -1; }

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APIs & Protocols Option 2 MQTT Lightweight machine-to-machine publish/subscribe messaging protocol Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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MQTT Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ No need for IP address of a device ▶ Scales to multiple devices ▶ Cross-platform / cross-language

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MQTT Example in JS Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs var mqtt = require('mqtt'); var client = mqtt.connect('mqtt:!//test.mqttbroker.example'); client.on('connect', function() { client.subscribe('presence'); client.publish('presence', 'Hello mqtt'); }); client.on('message', function(topic, message) { !// message is Buffer console.log(message.toString()); client.end(); });

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MQTT Example in C++ Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs #include #include #include !// Update these with values suitable for your network. byte mac[] = { 0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xED }; IPAddress ip(172, 16, 0, 100); IPAddress server(172, 16, 0, 2); void callback(char* topic, byte* payload, unsigned int length) { Serial.print("Message arrived ["); Serial.print(topic); Serial.print("] "); for (int i=0;i

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MQTT Subscribe Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs boolean rc = mqttClient.subscribe("myTopic");

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MQTT Setup Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs void setup() { Ethernet.begin(mac, ip); !// Allow the hardware to sort itself out delay(1500); mqttClient.setServer(server, 1883); if (mqttClient.connect("myClientID")) { !// connection succeeded } } void loop() { mqttClient.loop(); }

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MQTT Callback Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs void callback(char* topic, byte* payload, unsigned int length) { !// Allocate the correct amount of memory for the payload copy byte* p = (byte*)malloc(length); !// Copy the payload to the new buffer memcpy(p,payload,length); !// Republish the received message mqttClient.publish("outTopic", p, length); !// Free the memory free(p); } mqttClient.setCallback(callback);

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Example ▶ Twitch live lamp ▶ github.com/dkundel/twitch-live- lamp Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Example ▶ Twitch live lamp ▶ github.com/dkundel/twitch-live- lamp Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Pros ▶ Lightweight, intuitive ways to communicate between devices ▶ Move heavy business logic off devices ▶ Programming language independent Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Cons ▶ Still have to write C++ code for the hardware ▶ Need to deploy/use a message broker Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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2. Tethered Nodebots Node.js 㱺 Hardware Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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serialport serialport.io Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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johnny-five johnny-five.io Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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johnny-five ▶ Talk to microcontrollers from Node.js ▶ Use a familiar syntax ▶ Leverage the npm ecosystem ▶ Often tethered to a host machine Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Blink on an Arduino with C++ Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs !// the setup function runs once when you press reset or power the board void setup() { !// initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); } !// the loop function runs over and over again forever void loop() { digitalWrite(LED_BUILTIN, HIGH); !// turn the LED on (HIGH is the voltage level) delay(1000); !// wait for a second digitalWrite(LED_BUILTIN, LOW); !// turn the LED off by making the voltage LOW delay(1000); !// wait for a second }

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Blink on an Arduino with J5 Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs var five = require('johnny-five'); var board = new five.Board(); board.on('ready', function() { var led = new five.Led(13); led.blink(500); });

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Button with C++ Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs const int buttonPin = 2; !// the number of the pushbutton pin const int ledPin = 13; !// the number of the LED pin int buttonState = 0; !// variable for reading the pushbutton status void setup() { !// initialize the LED pin as an output: pinMode(ledPin, OUTPUT); !// initialize the pushbutton pin as an input: pinMode(buttonPin, INPUT); } void loop() { !// read the state of the pushbutton value: buttonState = digitalRead(buttonPin); !// check if the pushbutton is pressed. If it is, the buttonState is HIGH: if (buttonState !== HIGH) { !// turn LED on: digitalWrite(ledPin, HIGH); } else { !// turn LED off: digitalWrite(ledPin, LOW); } }

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Button with Johnny-Five Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs var five = require('johnny-five'); var board = new five.Board(); board.on('ready', function() { var led = new five.Led(13); var button = new five.Button(2); button.on('press', () !=> { led.on(); }); button.on('release', () !=> { led.off(); }); });

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Example #porgjs Building your own custom peripheral Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs Build a custom peripheral device that reacts on events on your computer Goal of #porgjs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs Build a custom peripheral device that reacts on events on your computer Goal of #porgjs Hack a porg toy to scream whenever your build fails!

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Warning! You might see the insides of a (toy) porg Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Wireup ▶ Arduino ▶ Optocoupler (4N35) ▶ Resistor ▶ Green LED ▶ Cables Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Demo npm install porgjs github.com/dkundel/porgjs Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Pros ▶ Hardware independent code with J5 ▶ Use familiar tools ▶ Bring your own editor/IDE ▶ Use the npm ecosystem ▶ Great website for beginners Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Cons ▶ Often tethered to a "host" ▶ Less examples than classic Arduino projects Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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3. "Untethered" Nodebots JavaScript ⚭ Microcontroller Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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JerryScript Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Ultra-lightweight JavaScript engine for the internet of things jerryscript.net Runtime: Samsung's IoT.js

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JerryScript Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ Lightweight ▶ Small memory footprint ▶ Not every JavaScript feature might be available ▶ Not very beginner friendly

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Espruino Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Espruino is a JavaScript interpreter for microcontrollers www.espruino.com

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Espruino Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Espruino is a JavaScript interpreter for microcontrollers www.espruino.com

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Esprunio Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ Can run on ESP8266 ▶ Has its own hardware versions as well ▶ Open Source Code & Hardware ▶ Comes with its own IDE ▶ Limited npm support ▶ Does not work with Johnny-Five

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Neonious Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs A microcontroller board programmable and debuggable out of the box www.neonious.com

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Neonious Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ Has its own hardware. Can run on ESP32 though ▶ Comes with its own IDE ▶ Supports TypeScript out of the box ▶ Same API interface as Node.js ▶ Built-in Ethernet & WiFi

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Tessel Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Tessel 2 is a robust IoT and robotics development platform tessel.io

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Tessel Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Tessel 2 is a robust IoT and robotics development platform tessel.io

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Tessel Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ Run Node.js with (almost) the entire npm ecosystem ▶ Compatible with J5 ▶ Use your favorite toolchain & editor ▶ Open Source Code & Hardware ▶ Tessel 2 is fairly expensive

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Example #coffeejs JavaScript meets Coffee Machine Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs Control an existing device programmatically Goal of #coffeejs Build a REST API implementing IETF RFC 2324

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs Control an existing device programmatically Goal of #coffeejs Build a REST API implementing IETF RFC 2324 Build a REST API implementing HTCPCP

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs Control an existing device programmatically Goal of #coffeejs Build a REST API implementing IETF RFC 2324 Build a REST API implementing HTCPCP Build a REST API implementing Hyper Text Coffee Pot Control Protocol www.ietf.org/rfc/rfc2324.txt

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Why Tessel? Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ The coffee machine should work untethered ▶ Use johnny-five to easily swap microcontrollers ▶ It has to be internet connected ▶ Quick setup / easy development ▶ We need to build a server. npm packages help

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Hacking It! Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Dominik Kundel | @dkundel | #cjs19 | #porgjs #coffeejs

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How I hacked a coffee machine using JavaScript bit.ly/coffee-js github.com/dkundel/htcpcp-delonghi Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Pros Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ Untethered systems running JavaScript ▶ Familiar programming language ▶ Use familiar tools ▶ Bring your own Editor/IDE ▶ (Potentially) use the npm ecosystem

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Cons Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ Less flexible on hardware choices ▶ Missing cutting edge language features ▶ Some docs better than others

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How to get started? Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Finding a project Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Use case driven learning Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Hack existing projects Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Electronics basics Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs

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Useful things ▶ A digital multimeter (Volt, Amps, Ohm) ▶ A breadboard ▶ Plenty of jumper wires ▶ A set of resistors ▶ A few LEDs ▶ A few Solid State Relays to emulate switches/buttons Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Johnny-Five Inventor's Kit Available on Sparkfun

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Grove Starter Kit for Arduino Available at Seeed Studio

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Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs Generic Arduino Starter Kit Elegoo UNO Starter Kit

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Resources Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs ▶ d-k.im/cascadia ▶ bit.ly/coffeejs ▶ d-k.im/nodebots ▶ nodebots.io ▶ johnny-five.io ▶ tessel.io

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console.log(` Thank You! `); dkundel.com @dkundel dkundel@twilio.com github/dkundel d-k.im/nodejsinteractive Dominik Kundel | @dkundel | #nodejsinteractive | #porgjs #coffeejs