Why Use It


Arduino is a great platform, but If you're trying to debug a program with a mix of software bugs and hardware issues, you could use a free helping hand! UnoArduSim.exe allows you to do a real-time test of most Arduino programs (for Uno) without needing any actual hardware. Supported libraries are: SD.h, Stepper.h, Servo.h, SoftwareSerial.h, Wire.h, SPI.h, and EEPROM.h (all for the Arduino V1.6.6 release). 

UnoArduSim provides a virtual target Uno board and allows the user to choose, and interface to, one or more of several types of  virtual input/output devices. These include typical hobbyist DC gear-motor, stepper-motor,  and servo motors,  generic serial devices with selectable baud rate, generic I2C and SPI slaves, an SD card with  SPI interface, digital and analog waveform generators, piezo speakers, LED's. push-buttons, resistive pull-ups and pulldowns, and a slider potentiometer. All devices are electrically (and mechanically)  modelled.

You can load and edit (and correct) your Arduino program, then run, run-to, halt, step-into, step-over, and step-out-of  while watching all accessible  program variables and monitoring pin levels (and even pin waveforms).  Simple and clear parse and execution error messages are provided. 

UnoArduSim is a free educational tool for everyone to use.

My Background


I had developed a number of simulators while working at Queen's University's Department of Electrical and Computer Engineering, and UnoArduSim.exe is my newest one.

Recent Announcements

  • Version 2.6.0 Released (and fixed!) Update Jan 6 2020, 8:pm EST Canada:The originally posted download file UnoArduSimV2.6.0.zip contained a bug that made the new libraries that rely on the pure ...
    Posted Jan 6, 2020, 5:15 PM by Prof Simmons
  • V2.5.0 Released This version fixes some minor bugs and add support for the TFT.h library (and PImage.h) , plus a new TFT I/O device, so you can draw shapes and ...
    Posted Oct 3, 2019, 11:22 AM by Prof Simmons
  • V2.4.1 Serial Receive Bug Fix Version 2.4 had an unfortunate bug introduced which broke serial reception from SERIAL and SFTSER devices. Version 2.4.1 fixes that
    Posted Aug 26, 2019, 10:09 AM by Prof Simmons
  • UnoArduSim V2.4 Released! Finally, I have managed to get the new version produced, with the usual minor bug fixes, plus some nice new features, all fully described in the new Help files:a ...
    Posted Jun 3, 2019, 10:32 AM by Prof Simmons
  • UnoArduSimV2.3 Released The new version contains a good number of bug fixes, and several new I/O devices ( including new support for the 1-Wire library) :1) A 7-Segment LED digit ...
    Posted Dec 30, 2018, 3:16 PM by Prof Simmons
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