MQTT Data Logger -Node-Red

This is a IOT data and topic logger similar to the python data and topic loggers that can be used for logging MQTT sensor and device data to log files either as a single file containing multiple topics or multiple files based on topic. It is controlled using a node-red dashboard making it much easier to use than the python loggers.

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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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Using the Node-Red Function Node- Beginners Guide

The function node is used to run JavaScript code against the msg object. The function node accepts a msg object as input and can return 0 or more message objects as output. This message object must have a payload property (msg.payload), and usually has other properties depending on the proceeding nodes.

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Using MongoDB Working Notes

If you’re new to mongoDB and are looking to use it on one of your IOT projects then you might find my working notes useful. Install – Manual links to install on multiple platforms How to Install mongoDB on Windows 10. The database files are stored in c:\data\db on Windows (default) and in the folder /var/lib/mongodb on Linux (Raspberry pi).

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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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Public MQTT Brokers and Reserved Topics – Discussion Post

Preface This is a discussion post and these are currently my thoughts on this topic. I would be grateful for comments and feedback. Introduction MQTT is still in the early stages of deployment and currently is used only on private networks. However with the growth in the adoption of the MQTT protocol for information distribution the number of public brokers and topics will probably increase substantially just as happened with websites in the early days of the internet.

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