ARC 2021.10.03.00 (Teams & Free)

(Autonomous Robot Control Software)
Make robots with the easiest robot programming software. Experience user-friendly features that make any robot easy to program.

Change Release Notes

ARC Pro is updated every four months to avoid interruptions. The next scheduled update is January 2022. Upgrade to ARC Pro and experience the immediate bug fixes.

Fix for audio not playing on legacy EZ-Robot EZ-B v4.x/1 controllers

Fix for importing legacy project formats using modified servo Movement Panel (port definitions did not load)

EZB Board image updates based on connected EZB during the port selection. Read about it HERE

Digital ports and servo ports now have board index options

updated Arduino mega capability to include UART and sr04 ping

added subscription plan manual button to the main menu bar

Added new IsServoReleased javascript and python command

Added speed parameter to servo advanced multi settings

New native support for servo Speed, Velocity, and Acceleration for all robot skills, including Auto Position. Makes creating gaits and robot movements much more realistic and smooth

Cheatsheet doesn't quote the parameter list because it was making commands with multiple parameters not quoted

Removed the built-in mip Movement Panel because there's a new improved v2 robot skill

Bing speech recognition will now execute the "All Phrases" script when silence is received and the variable will be blank. Can be used to detect if no speech was spoken (i.e. silence) if the variable is blank after a detection.

Bing speech recognition may lock-up during usage

Right-click moving robot skills to other desktops displays numbers instead of the workspace name

Script collection does not allow re-ordering

Camera device color & multicolor tracking has a bug assigning the variable name

Storage location for temp files now uses Windows environment variables (arc installers, robot skill installers, etc.). This allows Windows 10 Storage Cleaner to automatically clear the temp files when storage space is low.

Fixed importing robot skills. An error would raise if attempting to load a robot skill to a workspace less than the max workspaces because it would try to remove the other workspaces.

Speech recognition does not unpause after text to speech. ARC Pro and Runtime contain a workaround until Microsoft fixes their bug in .Net 4.7.2

Re-organization of the Auto Position configuration screen to improve clarity, productivity, and creativity. The updated online manual page screenshots no longer match the previous config window layout.

Allow renaming of virtual desktops for the organization of robot skills into groups.

Auto Position Transition To button does not enable when Realtime Update is unchecked.

Robot Skills that depend on ARC's Smart Timer may experience performance issues or errors.

Copy and pasting objects in the interface builder could link the scripts and parameters between objects.

The Multi-servo window closes when editing a servo position with the keyboard.

The project properties have an option to increase the servo position for higher resolution servos globally.

Displays a connection diagnostic when the EZB connection fails. It helps to identify connection issues. Also scans for network conflict if using multiple network devices.

The user interface accepts commands to control the visibility of objects. Users may also change text programmatically from a script of user interface objects.

Camera object tracking may overshoot turning while tracking.

Allow resizing of connection control for greater use of screen real-estate.

Some robot skills will not load the correct manual page when the help button is pressed from the skill's title bar.

Internal video player skill has been replaced with a new and improved Full-Screen Video Player robot skill.

JavaScript compiler may raise an error about empty null values when being assigned to the global variable manager.

*Note: the last release of Teams/Free was March 2nd, 2021.

*Note: This release requires that you update the mobile app (if applicable). Both iOS and Android have been published as of this update and will be available shortly once passed through their systems.

ARC Downloads

ARC Free


  • Includes one free 3rd party plugin robot skill per project
  • Trial cloud services
  • Free with trial limitations

For schools, personal use & organizations. This edition is updated every 6-12 months.



Only $8.99/mo

  • 2 or more PCs simultaneously
  • Includes unlimited skills
  • Cloud backup
  • And much more

Experience the latest features and bug fixes weekly. A Pro subscription is required to use this edition.



  • Load and run any ARC project
  • Operates in read-only mode
  • Unlimited robot skills
  • Early access fixes & features

Have you finished programming your robot? Use this to run existing ARC projects for free*.

  • Minimum requirements are Windows 10 or higher with 2+gb ram and 500+MB free space.
  • Recommended requirements are Windows 10 or higher with 8+gb ram and 1000+MB free space.
  • ARC Free known-issues can be viewed by clicking here.
  • Get more information about each ARC edition by clicking here.
  • See what's new in the latest versions with Release notes.

Compare Editions

Feature ARC
  Get ARC for Free View Plans
Usage Personal
Early access to new features & fixes Yes
Simultaneous microcontroller connections* 1 255
Robot skills* 20 Unlimited
Skill Store plugins* 1 Unlimited
Cognitive services usage** 10/day 6,000/day
Auto-positions gait actions* 40 Unlimited
Speech recongition phrases* 10 Unlimited
Camera devices* 1 Unlimited
Vision resolution max 320x240 Unlimited
Interface builder* 2 Unlimited
Cloud project size 128 MB
Cloud project revision history Yes
Create Exosphere requests 50/month
Exosphere API access Contact Us
Volume license discounts Contact Us
  Get ARC for Free View Plans
* Per robot project
** 1,000 per cognitive type (vision recognition, speech recognition, face detection, sentiment, text recognition, emotion detection, azure text to speech)


Upgrade to ARC Pro

Experience the transformation – subscribe to Synthiam ARC Pro and watch your robot evolve into a marvel of innovation and intelligence.


Thanks Perry! That's nice of you to say



i agree with perry . i am still very happy with ARC . the fast solution you give dj is fabulous . also for the others in dj's teamĀ  and other members .