Arduino Simulator 1.5.1



Designed and created by Louis D'Hont & Marc VDB

 Free license key: 5FVKL-CMSM2-ZH9EX-UAFIX-AKRN9

Download the Arduino Simulator 1.5.2

Free download

Windows XP and newer


Get the free license key:


Downloading not possible on smartphones.

Users manual Arduino Simulator

How to install the Arduino Simulator

Newest Java JRE

How to use it?

Help us adding new languages to our app 

Download this file (txt or docx) and translate it to your language

Send this file to info [-at-] xevro [-dot–] be

Arduino IO Simulator Windows

Arduino Simulator 1.5.1

You bought an Arduino, What now?


This Arduino Simulator is different than all the other simulators. If you don’t have components like sensors, LEDs..., then this program will simulate the components for you. You need a real Arduino board for testing your programs with your computer and just change some codes to work with the simulator components.


You can also combine simulated inputs/outputs from the simulator and real Arduino IO, now you have made a little HMI (Human Machine Interface). 


The Simulator has a lot of components that are required to test your projects.



Also available for MacOS.



Version 1.5.2



  • Serial Monitor 
  • Small bugs fixed
  • LCD-display optimized

Version 1.5.1


  • Reset-button added
  • Synchronization between Simulator and Arduino optimized
  • The double use of in-outputs improved
  • LCD functionality optimized
  • Little bugs in design solved
  • App icon redesigned
  • Error message added for restore settings
  • Icons and images are optimized
  • The reset IO button is optimized
  • Buttons get color when pressed
  • Restore files are updated
  • Menu bar adjusted
  • Name of servo has been changed to 'myservo1Write'


Version 1.5


  • The variable input field for COM ports
  • Little bugs in design solved
  • User manual changed
  • Automatically installing libraries
  • About changed
  • Icons and images are optimized
  • Dutch/English adapted and improved
  • Application icon added


Version 1.3 - 1.4


  • A few bugs and errors are solved.


Version 1.2


  • Design a simulation library that makes the program easier.
  • New examples to test the Arduino simulator.


Version 1.1


  • Save and restore the settings
  • Languages choice Dutch/English
  • Adjustable screen resolution
  • Instructions for Dutch/English
  • Button  added for connection break
  • Automatic detection of the COM-port
  • Analog inputs extended (A0-D14...)
  • Glitches in the toolbar solved
  • Relays in digital outputs added
  • Arduino library improved
  • Redesign the reset-button
  • Test sketches improved
  • Serial Drivers changed
  • Save and restore settings optimized


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Arduino IO Simulator


Free Arduino Simulator course


Register for free to access 10 projects with videos in which everything is explained step by step. The course contains all the information you need to be able to start yourself afterwards in simulating your Arduino projects.



Designed for people in hardware need!


The Arduino Simulator has been drastically changed the way you use a simulator. By communicating with the Arduino board we can simulate your IO on your screen. To make everything as easy as possible we created a library that allows users to simulate it by changing 1 letter of there code.

This Arduino Simulator is designed to optimally simulate your (IO) projects with the aim of testing your projects without components if you don't have some parts yet you can simulate them.


Update for free to the latest version, donations are warmly appreciated!

Add yourself to the newsletter and get a notification when there is an update available.

Use this free license key: 5YHT7-XSRYB-K9R7N-GS2EN-HLPYT


The Arduino Simulator has many components built in to test your projects. 


  • 14 LEDs (4 colors, customizable)
  • 8 buttons
  • Squarewave generator
  • Buzzer (Frequency adjustable)
  • Noise detection (microphone)
  • 3 sliders (analog)
  • 7-segment display
  • LCD display (16-2)
  • Bargraphs
  • Tone melody
  • Sound generator (frequency changeable)
  • Servo motor

Simulate your IO

A simulator made for beginners

This simulator is designed for beginners who want to test their program quickly or don't have the necessary electrical parts.


Write your project in the Arduino IDE. Add the Simulator library and change the codes.

Upload the code to the Arduino board. Select your inputs and outputs in the simulator.


Arduino Simulator
Arduino IO Simulator

Test your code quickly

Whether you are building an Arduino project or just started working with Arduino, you can use this simulator to test your ideas without any electrical or almost no components. We have the most used parts available.

Just change the first letter and you're ready to test

Change the first letter in your code to use the simulators test library

In order to let the Simulator understand the code, we have devised our own instructions. To maintain the usability, we have decided to change the current instructions a little bit and replace only the first letter with a capital letter. We have modified the instructions with a point so that the point may be omitted.


digitalWrite(13, HIGH);   ->  DigitalWrite(13, HIGH);


lcd.print("x");  ->  lcdprint("x");


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