Uploaded January 2020 | Updated September 2026, 3 weeks ago

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In this video we look at how you can use node-red to read and write data to modbus devices.
This video is the second video in a 3 part series and In this video we will take a look at reading and writing to modbus.
iN particular how to read and write 32bit integers,floats and double floating point numbers.
To illustrate these node we use a simple flow that read and write data from a modbus simulator.
Flow Used in Video
stevesnoderedguide.com/download/modbus-video2


Modbus,Node-Red and MQTT -video 1
youtu.be/f6BhSprc9i4

Node-Red Buffers- (Integers and Floats)
youtu.be/1qcXz0JTuD4
Resources
Modbus notes
https://stevesnoderedguide.com/...
PLC Simulator
plcsimulator.org/downloads


Related Videos
Modbus,Node-Red and MQTT -video 1-Overview
youtu.be/f6BhSprc9i4

Node-Red ModBus and MQTT Dashboard -video 3
youtu.be/-4Dg0zTEYOk



If you find these videos useful then you might want to consider buying me a coffee
paypal.me/StepenCope