Using cURL for Testing IOT Applications

The http protocol is the main protocol used on the web, and because of its widespread adoption it is also used in IOT applications. Many IOT applications like the Thingsboard Dashboard support both http and MQTT. In this tutorial we will start with a general introduction to cURL and show examples of using cURL to get and POST data.

Continue reading

Understanding And Using MQTT v5 Request Response

Web Applications have a direct connection between the sender and receiver. The sender is the client (web browser) and the receiver is the server. They implement a command response message flow were the client(browser) makes a request and the server responds and there is a direct connection between client and server.

Continue reading

MQTT v 5.0 New Features Overview

MQTT v5 introduced many new features and changed how some existing features work. In this tutorial I will be covering all of these features with brief examples, and also in many case, links to detailed examples and videos.

Continue reading

IPv6 Explained for Beginners

IPV6 has been developed to replace IPV4 which is running out of addresses. Although it has been around almost 10 years it is still not widely deployed and supported. However adoption rates are increasing rapidly and IPv6 traffic crossed the 10% threshold in February 2016 (wiki) .

Continue reading

Understanding IPv4 Addressing and Address Classes

IPv4 has been in use since the start of the Internet, and is widely deployed across the Internet, and home networks. In this tutorial we will cover the basics of IPv4 Addresses. You will Learn IPv4 address structure IPV4 Address classes Special and reserved IP addresses Broadcast Vasics

Continue reading

Control Raspberry Pi GPIO Pins Using MQTT

The Raspberry Pi has 40 General purpose Input/output Pins (GPIO) that can be used for controlling external hardware. There are  a number of add-on boards called hats which plug into these pins and provide various sensors. The most common one being the sense hat.

Continue reading