MQTT (MQ Telemetry Transport or Message Queuing Telemetry Transport) is an open OASIS and ISO standard (ISO/IEC 20922) lightweight, publish-subscribe network protocol that transports messages between devices. WIKIPEDIA.
Below I post the tutorial I followed to install it on my Mac, but furtheron, I will have to install it on a Raspeberry Pi 3.
The whole process of installing Homebrew and everything else is not so friendly at all.
What is MQTT and how it works?
Raspberry Pi 3 IoT Home Server
Web browser-based flow
Node Red Helps you to interconnect through a web browser based platform, a lot of different inputs and outputs that work as nodes, ehoch you can program in diferent ways. This is a visualization of how I connected some nodes to create a visualization for my project.
I also found some usefull documentation of the propper message structure wich helped me solving some problems I had in the beggining.
To install the Dashboard ti visualize the data, I followed the tutorial on FabAcademy web page. Then I did some testings to send messages directly through terminal and it worked.
Mosquitto Pub-SUb Pub extra documentation
This is a visualization of live sensing and web scrapping data from a weather API. The upper data is the real weather from Barcelona and Bogotá, gattered from the Open Weather Map. I lear how to do it following a tutorial.
Open Weather Map API
Tutorial for the API + NodeRED
In the lower part, the sunlight measure is being senses through an LDR, and the and the lower one is sensed or directly commanded to be like that.
When you download the information from some sources like APIs, Sensors with multiple readings or others, you have to first debugg the msg.payload, and then SWITCH or SET the msg.payload to be the information you need to get. After that you can selct from different outputs how you want it to actuate.
Understanding the Structure (debug)
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