how to build own iot platform
TRANSCRIPT
HOW TO BUILD OWN IOT PLATFORM?
AGENDA
➤ What is Internet of Things
➤ What we may do with it?
➤ Does it involve in our lives?
SOME EXAMPLES
SOME EXAMPLES
REST API
➤ KISS - Keep It Simple Stupid
➤ Make documentation
➤ Use e. g. Swagger
➤ Integration with other APIs
COLLECT DATA AND ANALYSE
➤ e. g. Elasticsearch and Kibana
MONITORING
MQTT
➤ MQTT is lightweight, secure, battery friendly and machine-to-machine (M2M) / “Internet of Things” connectivity protocol
➤ Publish-subscribed based
➤ Designed for connections with remote locations where “small code footprint” is required and/or network bandwidth is limited
➤ The publish-subscribe messaging pattern requires a message broker
➤ The broker is responsible for distributing messages to interested clients based on the topic of a message
MQTT
➤ supports offline messaging
➤ retains messages like key/value store
ARCHITECTURE
ARCHITECTURE
MQTT SUBSCRIBER
var mqtt = require('mqtt');
// load balancer var client = mqtt.connect('mqtt://YOUR.BROKER.URL');
client.subscribe('business/link');
client.on('message', function(topic, message) { console.log(message.toString()); });
console.log('Client started...');
MQTT PUBLISHER
var mqtt = require('mqtt');
// load balancer var client = mqtt.connect('mqtt://YOUR.BROKER.URL');
client.subscribe('business/link');
console.log('Client publishing...'); client.publish('business/link', ‘Welcome at IoT meeting… Test Ping! ' + Date());
client.end();
MQTT.FQ
➤
MQTT BROKERS
➤ Mosquito
➤ Mosca
➤ CloudMQTT
➤ HiveMQ
MQTT.JS
➤ 20k packets/second parser
➤ stream based
➤ High-Level Client API
➤ Low-Level Server
MOSCA
➤ Standalone usage
➤ Embeddable in your app
➤ Authentication API
➤ Supports AMQP, Mongo, Redis, and MQTT as pub/sub backends
➤ Needs a DB as LevelDB, Mongo or Redis
➤ Support Websockets
➤ Fast, 10k+ messages routed per second
➤ Scalable, 10k+ concurrent connections
MOSCA, MQTT.JS, BROWSER
➤ Works on top of WebSockets
➤ Node.js excels that ;)
➤ MQTT over Websocket is ‘standard’
➤ Uses test broker at test.mosca.io
MOSCA SPEED
MOSCA VS MOSQUITTO
ECLIPSE PONTE
➤ Supports multiple protocols HTTP, MQTT, CoAP
➤ Based on Mosca, Express and Node.js
➤ Will support data transformation too!
ANGULAR SERVICEdefine([ 'angular', ], function (angular) { 'use strict';
angular.module('BenfiIoTApp.Services.MQTTService', [ 'BenfiIoTApp.Config' ]) .factory('MQTTService', ServiceFn);
ServiceFn.$inject = [];
function ServiceFn() {
var service = this; var client = {};
service.connect = connect; service.publish = publish; service.onMessage = onMessage;
function connect(host, port, user, password) { var options = { username: user, password: password }; console.log("Try to connect to MQTT Broker " + host + " with user " + user); client = mqtt.connect(host, {}); client.subscribe("presence");
client.subscribe("sensors/brightness"); client.subscribe("sensors/temperature"); client.subscribe("sensors/humidity");
client.on('error', function(err) { console.log('error!', err); client.stream.end(); });
client.on('message', function (topic, message) { service.callback(topic, message); }); }
function publish(topic, payload) { client.publish(topic, payload, {retain: true}); console.log('publish-Event sent '+ payload + ' with topic: ' + topic + ' ' + client); }
function onMessage(callback) { service.callback = callback; }
return service; } });
BROWSER SUBSCRIBERdefine([ 'angular' ], function (angular) { 'use strict';
angular.module('BenfiIoTApp.Controllers.RealtimeCtrl', [ 'BenfiIoTApp.Config', 'BenfiIoTApp.Services.MQTTService' ]) .controller('RealtimeCtrl', ControllerFn);
ControllerFn.$inject = ['$scope', 'MQTTService'];
function ControllerFn($scope, MQTTService) { var vm = this;
vm.brightness = 0; vm.temperature = 0; vm.humidity = 0;
MQTTService.connect( ‘ws://YOUR.BROKER.URL' );
MQTTService.onMessage(function(topic, payload) { switch (topic) { case 'sensors/brightness': vm.brightness = payload.toString(); break; case 'sensors/temperature': vm.temperature = payload.toString(); break; case 'sensors/humidity': vm.humidity = payload.toString(); break; default: break; } $scope.$apply();
}); } });
BROWSER PUBLISHERdefine([ 'angular' ], function (angular) { 'use strict';
angular.module('BenfiIoTApp.Controllers.ColorCtrl', [ 'BenfiIoTApp.Services.MQTTService' ]) .controller('ColorCtrl', ControllerFn);
ControllerFn.$inject = ['MQTTService'];
function ControllerFn(MQTTService) { var vm = this;
vm.selectedColor = '#000000'; vm.send = send;
MQTTService.connect( 'ws://YOUR.BROKER:URL' );
function send() { MQTTService.publish('color', vm.selectedColor); }
} });
DEVICE SOFTWARE
➤ On your Arduino Yun install packages:
➤ opkg update
➤ opkg install mosquitto mosquitto-client libmosquitto
DEVICE PUB/SUB#include <MQTTclient.h> #define MQTT_HOST “YOUR.BROKER.URL”
void setup() { Serial.begin(115200); // remember the bridge! Bridge.begin(); // begin the client library (initialize host) mqtt.begin(MQTT_HOST, 1883); mqtt.subscribe("color", colorEvent); }
void loop() { // check for incoming events mqtt.monitor();
mqtt.publish("sensors/brightness", brightness); mqtt.publish("sensors/temperature", temperature); mqtt.publish("sensors/humidity", humidity);
delay(1000);
}
void colorEvent(const String& topic, const String& subtopic, const String& message) { // hex to rgb String hexstring = message; // Get rid of '#' and convert it to integer long number = strtol( &hexstring[1], NULL, 16); // Split them up into r, g, b values long r = number >> 16; long g = number >> 8 & 0xFF; long b = number & 0xFF;
for (int i = 0; i < NUMPIXELS; i++) {
pixels.setPixelColor(i, pixels.Color(r,g,b)); // Moderately bright green color. pixels.show(); // This sends the updated pixel color to the hardware. delay(delayval); // Delay for a period of time (in milliseconds). } }
WHY CLOUD? WHY AWS? WHAT MAY BE USEFUL?
➤ Load balancers
➤ Security groups
➤ Autoscaling
➤ Elastic Beanstalk
➤ EC2
➤ S3
➤ Elasticsearch Service
➤ ElasticCache
➤ Lambda
➤ Kinesis
IOT PLATFORMS
LINKS
➤ MQTT.js
➤ Mosca
➤ Eclipse Ponte
➤ Easy Arduino Yun MQTT Client
