The idea of this page is to present simple example flows or sub flows that solve a particular problem, and that can be used as part of larger projects.
If you have any suggestions then I would be glad to hear them just use the comment form at the bottom of the page.
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In addition there are much larger and more complex flows that I have create to solve a particular problem which are contained in the projects category and that you may also find useful.
- Find Tasmota Devices
- Set Coloured Text for Dashboard widgets
- Split Message Payload and Display on Gauges
- Simple Keypad for Node-Red Flows
- Display last x Messages
- Read file line by Line
- MQTT Topic Filter
- Republishing HTTP Data Over MQTT with Node-Red
- MQTT Data Logger -Node-Red
- Monitoring MQTT Brokers – Includes several flows for monitoring MQTT brokers
Find Tasmota Devices
A simple flow to find and display details of all the Tasmota devices on your local network. There is a more detailed flow description on my other site-find tasmota devices
Set Text Colour Of Text Dashboard Widget
The goal here is to change the text colour in a dashboard text widget but can also be applied to other widgets.
The flow consists of an inject node that send a simple text string and a change node to set payload properties for the colours. continued
Splitting a Message Payload
In this simple project we will look at splitting a simple message payload, and then display the data in a text box and on gauges on a dashboard.
The payload consists of a simple string containing temperature and humidity readings separated by a ampersand (&). continued
Simple Keypad for Node-Red Flows
Display last x Messages
Will display the last x messages. x is 10 by default and can be changed in the code.
Read File line by Line
Some time you need to step through a file line by line. This simple flow lets you do that by using the nodejs readlines module.
The video is here that describes how it works:
and the flow is here
MQTT Topic Filter
Filtering out MQTT topics is a common task and this sub flow makes this easy to implement.