cisco packet tracer iot devices examples

Įqually it could have been an engine management system publishing fuel consumption data or a smart meter publishing electricity consumption figures. In this case it could be an intelligent device which switches on an A/C unit or a passive data logging system or even an intelligent building management system which in its wisdom has chosen to open the windows. The MQTT Broker has then forwarded this information to all those 'Clients' who have chosen to 'Subscribe' to this news 'Topic'. Here an IoT device or 'Client' has detected an unusually high temperature and 'Published' this 'Topic' to the MQTT 'Broker'. The second picture above is a generalised pictorial representation of a Publish/Subscribe protocol in action. Once you couple this with a WiFi connection (ESP8266) or Ethernet link (Ethernet Shield) you have yourself the basis of an IoT device. Which in normal language means a communications protocol so simple and small that even a microprocessor system like an ESP8266 or Arduino can support it. This protocol is known as 'Publish/Subscribe' and is extremely simple and lightweight, being designed specifically for 'constrained devices' and low bandwidth systems.

IoT devices rely upon an underlying protocol named 'Message Queuing Telemetry Transport' or 'MQTT' for short.

A very basic understanding of what client/server means.

One USB Hub, Keyboard, Mouse and LCD monitor to set up the Pi.

This Instructable documents how to set up an IoT MQTT Broker and verify it is working correctly by 'snooping' MQTT topics with MQTTSpy. Now we will set up a server which will establish your main household IoT infrastructure and test it works as expected. Okay In 'Part 1 : IoT, Home Automation', you've set up and configured your 'Vanilla' Raspberry Pi (pardon the pun) and can connect to it remotely with PuTTY.

Cisco packet tracer iot devices examples