DecodeThings

Open a terminal and follow these steps: $ sudo apt-get update $ sudo snap install ngrok If the snap is not installed then: $ sudo apt install snapd Expose a local webserver to the internet. Expose a web server running on your local machine to the internet. The HTTP default port is 80 $ ngrok http 80 Create an account on https://dashboard.ngrok.com then only you will be able to get the Auth Token, after logging in copy the Auth Token from here: https://dashboard.ngrok.com/get-started the n run: $ ngrok authtoken <YOUR_AUTHTOKEN> How to do HTTP tunneling Go to ngrok-stable-linux-amd64 folder (in my case it’s in Downloads/Software)      Eg: $ cd Downloads/Software/ngrok-stable-linux-amd64 $ sudo ./ngrok http 9000 If you want you can password protect your tunnel $ sudo ./ngrok http -auth=”username:password” 9000 How to do TCP tunneling Go to ngrok-stable-linux-amd64 folder (in my case it’s in Downloads/...

Highlighted lines are headings only and each line is a separate line of code. Install Mosquitto Broker sudo apt-get update sudo apt-get install mosquitto Install the Clients and Test sudo apt-get install mosquitto-clients Secure with a Password sudo mosquitto_passwd -c /etc/mosquitto/passwd mqtt_user_name Password: mqtt_password Create a configuration file for Mosquitto pointing to the password file we have just created. sudo nano /etc/mosquitto/conf.d/default.conf allow_anonymous false password_file /etc/mosquitto/passwd Final sudo stop mosquitto sudo systemctl restart mosquitto   Ubuntu 14.04 sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa sudo apt-get update sudo apt-get install mosquitto

MQTT is a standard messaging protocol for IoT (internet of things), it is a too lightweight public/subscribe transport, due to its lightweight the communication is too fast and use minimal network bandwidth, nowadays it is In demand in various industries like robotics, automotive, manufacturing, telecommunication, etc. What are the features of MQTT : MQTT is a lightweight message queuing and transport protocol. Allows bi-directional communication. Asynchronous communication model with a message. Reliable delivery of messages Based on Publish / Subscribe model. Communication between Publisher and the subscriber happens because of the broker. Topics help to segregate messages. MQTT Base Model MQTT entities   MQTT Clients:  Publisher and Subscriber. MQTT Server:       Broker. Topics MQTT   Model 2 Session Subscription Message :    CONNACK  SUBACK   PUBLISH   RETAIN    DUP   QoS.