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How to Program an Arduino as a Modbus RS485 Master & Slave (Udemy.com)

Learn how to create your own Modbus RS485 Master and Slave Device using the Arduino Uno Development System

4.6
480 reviews

Created by: Emile Ackbarali

Last updated May 2026

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What you will learn

  • Understand the Arduino Uno and RS485 Shield from a Hardware persepctive
  • Connect an Arduino RS485 Shield to an Arduino Uno
  • Connect an Arduino Uno to a Hitachi HD44780 LCD display
  • Use the Arduino IDE to develop applications for the Arduino Uno
  • Write an Arduino Sketch application to display messages on an LCD display
  • Write an Arduino Sketch application to implement a Modbus Master
  • Test an Arduino Modbus master using the Modsim32 Modbus slave simulator
  • Write an Arduino Sketch application to implement a Modbus Slave
  • Test an Arduino Modbus slave using the Modscan32 Modbus master application

How it compares

Against the other 295 rated Udemy courses in Arduino on CourseDuck:

  • Rating4.6 out of 5higher than 77% of them
  • Reviews480#69 of 296 by number of reviews
  • Length2.8 hoursshorter than 71% of them
  • Last updatedMay 2026more recently than 92% of them

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Course Description

If you work in the Automation Industry, you will know that automation equipment is very expensive. And many a time, especially for small applications, you simply cannot justify the use of very expensive equipment.
This is where the Arduino comes in!
The Arduino development board allows you to create very simple, but very powerful, Modbus master or slave devices through the use of relatively simple "C" programming. With the Arduino, you have full custom control over the program design allowing you to create very lean and very efficient devices for very specific purposes.
Put simply, mastering Modbus on the Arduino is going to take your skill level and value in the Automation Industry to a whole new level.
That is what this course is going to do. At the end of the course, you will know how to:
1. Choose the appropriate Arduino hardware.
2. Interconnect Arduino hardware with other add-on hardware.
3. Write "C" applications to implement Modbus master and slave functionality.
4. Use software and hardware to test each application that you write.
All of the programs written in the course are freely downloadable and give you a perfect starting point for further development. At the end of the course, you will have the knowledge to create your own products, your own custom Modbus master and slave hardware.
Looking forward to seeing you on the inside!Who this course is for:
  • Electrical Engineers
  • Electrical Technicians
  • Electrical Tech or Engineering Students
  • Process Control Technicians and Engineers
  • Process Automation Engineers
  • Programmers working in the Process Automation field
Read More Intermediate Intermediate Level product length iconTime: 2.8h

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Instructor Details

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I have been working in the fields of Software Development, Software Systems Integration and Process Automation since 1996. In 2003, I stepped out on my own and started working for myself providing software development and systems integration services to small and medium businesses.
I am also associated with a great company called Mora Systems Limited that under the leadership of it's Managing Director has produced innovative and outstanding products and services in the fields of GIS and Cellular based SCADA.
Teaching has always been a passion for me. I have taught at the tertiary level for many years on the subjects of programming, control systems as well as systems integration. In the last few years I found myself incorporating more and more videos into the curriculum with amazing results.
When I heard of uDemy I just could not help but sign up. With teaching in a classroom, you can reach only so many students, but with uDemy you can reach the world! I plan to publish and promote as many courses as I possibly can on the uDemy platform.

Read More

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Reviews

4.6

480 ratings on Udemy

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By Darrell Johnson on 9/11/2020

Learned a lot but I believe I still need to further my Arduino and Modbus education.

By Francis Poelmans on 8/13/2020

Overzichtelijk en goed gebracht.

By Nidal Mustapha on 8/12/2020

der erster Eindruck ist sehr gut, ausfhrlich und sinnvolle Erklrung

By Manuel Servin Arreygue on 8/4/2020

Seguro justo lo que necesitaba

By Johnny Zhang on 7/27/2020

Super Useful! Every small step leads to a final success!

By Ron Kemp on 7/26/2020

Clear, concise instructions, good pace.

By Ricky Cheng on 7/2/2020

Step by step ,it is easy to follow.

By Pieter Dumon on 6/26/2020

Very informative

By Jason Durrett on 6/14/2020

Very concise and perfect! Just what I needed

By Hadley Hartshorn on 6/7/2020

Pacing was good. More information on the libraries would be nice.

By Julio Londono on 5/24/2020

Great Intro to work with Arduino and to implement Modbus, good explanations!

By Hermanus van Dyk Fourie on 4/22/2020

Hi thank you, I will purchased the hardware to start testing and learning. I would like to read Modbus values on solar inverters and power meter in order to build customized dash board for our customer. You did share some good info in order to get me up and running.

Showing 12 of 140 reviews

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Overall Score : 92 / 100

How to Program an Arduino as a Modbus RS485 Master & Slave
Visit course on Udemy Write a review
  • Video Duration: icon 2.8h
  • Price: $49.99
  • Provider: icon Udemy
  • Updated: icon May 2026
  • Level: Intermediate Intermediate
  • Language: icon English
  • Certificate: icon Yes
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