MQTT Broker for Node-RED based on Aedes.

You can use the MQTT protocol in Node-RED without an external MQTT broker like Mosquitto.

This node was created because the original MQTT broker node-red-contrib-mqtt-broker uses mosca which is no longer maintained.

You can install the node directly within the editor by using the Palette Manager.

To install the node from the command-line, you can use the following command from within your user data directory (by default, $HOME/.node-red):

npm install node-red-contrib-aedes

Just put this node on Node-RED and hit the deploy button. The MQTT Broker will run on your Node-RED instance.

• Standard TCP Support
• WebSocket Support via port or path
• SSL / TLS
• Message Persistence (In-memory, LevelDB or MongoDB)

For more information see Aedes.

If your server is behind a firewall or you cannot open any ports…

Graph 2D is an addon able to display plots in your user interface in a very simple way.

This repository contains the add-on and examples.

• Display several plots on the same graph.
• Supports curve thickness and color.
• Customizable chart axes (axis label and grid).
• Real-time plotting.
• Works with all renderers.
• Works on desktop platforms and HTML5 (others target were not tested).
• Documentation included with the plugin.

• Add a Graph2D node as a child of the root node. Adapt its size to the control.

• Create a new plot using the method Graph2D.add_plot_item() from your script. The arguments are in order the name of the plot, its color and finally the thickness of the line.
  • Note: This method will return an Graph2D.PlotItem object which will then be used to reference the plot and update its points.

func _ready() -> void
    

Godot 4 addon - to implement MQTT

Clone the repo and copy the addons/mqtt folder into your project's addons folder (or use the AssetLib to install when

MQTT is probably the simplest known networking protocol you can use to communicate between systems, which is why it is often used by low power IoT (Internet of Things) devices.

In spite of its simplicity, MQTT is extremely flexible and has the advantage of being standardized enough that you don't need to write your own server-side software. You can often get by with "borrowing " the use of a public server on the internet (see test.mosquitto.org).

Uses for MQTT in Godot are chat rooms, receiving and sending messages to physical devices, high score tables, remote monitoring of runtime metrics (eg framerate) of an alpha release for quality control, and as a signalling server for the powerful WebRTC peer-to-peer networking…