{ // 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); Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
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 } Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
var board = new five.Board(); board.on('ready', function() { var led = new five.Led(13); led.blink(500); }); Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
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); } } Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
⚒ Use familiar tools # Bring your Editor/IDE $ Use the npm ecosystem % Great website for beginners Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
" Has its own hardware versions as well # Open Source Code & Hardware ✍ Comes with its own IDE ⛔ Limited npm support & Does not work with J5 Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
✍ Comes with its own IDE $ Supports TypeScript out of the box % Full Node.js and npm support & Built-in Ethernet & WiFi Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #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 Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
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 Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
Familar programming language ⚒ Use familiar tools $ Bring your own Editor/IDE % (potentially) use the npm ecosystem Dominik Kundel | @dkundel | #BerlinJS #nodebots #porgjs #coffeejs
" 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 | #BerlinJS #nodebots #porgjs #coffeejs
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