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.

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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) .

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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

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Using the Node Red Status Node

In Node red any node can report status information in the visual editor. The screen shot below shows the mqtt node. It shows a green circle to indicate that it is connected and the text connected underneath the node.

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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 areĀ  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.

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Beginners Guide to Data and Character Encoding

When I first starting working with computers everything was in ASCII ( American Standard Code for Information Interchange ) However today working with networking protocols and network programming you will come across a variety of data and character encoding schemes. In this tutorial we will look at basic encoding schemes used on computers and in the second part of the tutorial we look at how data is sent over a network.

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How MQTT Works -Beginners Guide

MQTT is a messaging protocol i.e it was designed for transferring messages, and uses a publish and subscribe model. This model makes it possible to send messages to 0,1 or multiple clients.

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