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How to Program VEX Robots with ROBOTC 4.x

How to Program VEX Robots with ROBOTC 4.x

If you are interested in learning how to program VEX robots using industry standard C-programming language, you should check out ROBOTC 4.x. ROBOTC 4.x is a software that allows you to program both the VEX Cortex and the VEX IQ robotics platforms. It has many features and tools that make programming easier and more fun.

In this article, we will show you how to get started with ROBOTC 4.x and some of the basic concepts of robot programming. You will need a Windows computer, a VEX robot kit, and a ROBOTC 4.x license. You can download ROBOTC 4.x for free from and purchase a license from

robotc 4 x keygen 33

Installing ROBOTC 4.x

To install ROBOTC 4.x, follow these steps:

  • Go to and click on "Download" under "ROBOTC for VEX Robotics Platforms".

  • Select the version that matches your operating system (Windows 7, Windows 8, or Windows 10) and download the .exe or .msi file.

  • Run the installer and follow the instructions on the screen. You may need to restart your computer after the installation.

  • Launch ROBOTC 4.x from your desktop or start menu.

  • Enter your license information when prompted. You can purchase a license online or use a trial license for 10 days.

  • Select your platform (VEX Cortex or VEX IQ) from the drop-down menu on the top left corner of the screen.

Connecting Your Robot

To connect your robot to your computer, follow these steps:

  • Make sure your robot is turned on and has batteries.

  • Connect your robot to your computer using a USB cable or a wireless device (VEXnet Joystick or VEX IQ Controller).

  • In ROBOTC 4.x, go to Robot > Download Firmware > Automatically Update VEX Cortex (or VEX IQ) to update your robot's firmware. This may take a few minutes.

  • In ROBOTC 4.x, go to Robot > Platform Type > Natural Language PLTW (or Natural Language VEX IQ) to enable the Graphical Natural Language mode. This mode allows you to use simplified commands such as "Forward", "LineTrack", and "Repeat" loops.

Writing Your First Program

To write your first program, follow these steps:

  • In ROBOTC 4.x, go to File > New > Graphical File to create a new graphical file.

  • In the left panel, you will see a list of commands that you can drag and drop into your program. You can also right-click on any command to see its description and parameters.

  • To make your robot move forward for one second, drag and drop the "Forward" command from the "Movement" category into your program. Set the speed parameter to 50% and the time parameter to 1000 milliseconds.

  • To make your robot stop, drag and drop the "StopAllMotors" command from the "Movement" category into your program.

  • To save your program, go to File > Save As and give it a name such as "MyFirstProgram".

  • To download your program to your robot, go to Robot > Compile and Download Program. You will see a message saying "Download Complete" when it is done.

  • To run your program on your robot, press the start button on your robot or controller. You should see your robot move forward for one second and then stop.


Congratulations! You have just written your first 0efd9a6b88


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