Hi and Welcome to Steve’s Internet Guide.

The first wave of the Internet involved connecting people to each other and people to information.

The next wave of the Internet will involve connecting the physical world to the Internet, and machines to each other (M2M – Machine to machine). See An Introduction to IOT

How will these devices be managed and monitored? What will happen to the data.

IOT MQTT and Node-Red

Node-Red is a flow based programming tool that is being used for monitoring and managing IOT devices and systems.

Node-Red makes it easy to create IOT systems with little or no programming knowledge using a web browser interface and could easily become the WordPress of IOT.

MQTT is also fast becoming the de facto IOT messaging protocol and having a working knowledge ot this protocol will be essential for building IOT systems.

This site will focus on Node-Red and building IOT systems using it.
If you have any questions please ask

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MQTT Lens is an add-on for the chrome browser that lets you publish messages to an MQTT broker and subscribe to MQTT topics and receive messages using the chrome web browser.

Once installed you access it via the url chrome://apps as shown below: (more…)

The MQTT CONNECT and response messages (CONNACK) have been greatly enhanced in MQTTv5 with the addition of the properties field.

This allows for a large increase in the information that can be exchanged on connection establishment compared to MQTT v3.11.

The properties field can be found in both the CONNECT and CONNACK , DISCONNECT and other messages.

The purpose of this tutorial is to provide an overview of the CONNECT message in MQTTv5 and a quick Comparison with MQTT v3.11. (more…)

MQTT is probably the most common IOT protocol and many IOT service providers and devices provide an MQTT based API.

In the tutorial we are going to use a simple MQTT API to manage several simulated devices. (more…)

Many of the APIs today are Web API’s designed to access web services like Facebook ,Twitter etc. Because of their widespread use most IOT services (AZURE,AWS,Bluemix)  also support http based APIs.

To understand and use an http API you will need a reasonable understanding of the following: (more…)

When sending and receiving data in IOT applications and APIs you will encounter JSON formatted data.

Having a good working knowledge of JSON and how to create and use JSON data will be very important in developing IOT applications. (more…)