Castle Link V4 USB Programming Kit for Cobra Series

Castle Link V4 is our new 32-bit based USB adapter. 

For all other ESCs, please purchase the Castle Link V3 USB adapter.

Program your Cobra Series ESC on your Windows® PC (10 or higher) with the Castle Link V4 USB programming kit.

• Set up of programmable options with point and click ease
• View your current program settings
• Download and view the ESC's onboard data logs
• Update ESCs with new firmware (if available)

Set-up instructions:

1. Download the Castle Link 2 software from our Downloads area.
2. Run the Castle Link 2 installer and follow on-screen prompts.
3. Plug the Castle Link V4 adapter into the provided Type-C USB cable.
4. Connect the ESC's receiver lead to the Castle Link adapters prongs; the brown wire connects to the pin marked "GND" or "-".
   

Package includes:
Castle Link V4 adapter
Type C USB cable
Castle Decal sheet

For more information about the Castle Link software, visit the Downloads page.

Castle Link contains a proprietary interface adapter and standard USB cable with Type-C port.

System Requirements: Castle Link 2 is compatible with Windows 10 or higher. You need is an available Type-A USB port.

Assembled in the Philippines. Commercial customers may inquire about assembled in Olathe, KS, USA versions.

Note: Units made after June 2025 require use of Castle Link 2 software to modify BEC output voltage.