> For the complete documentation index, see [llms.txt](https://dahl-design.gitbook.io/ddc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dahl-design.gitbook.io/ddc/4.-advanced-features/simhub-control.md).
# LED control
There are a few things to set up to allow SimHub to make contact with your controller.
First you'll need to[ set up a VID/PID](/ddc/3.-coding/naming-the-controller.md) for the controller.
When you've [uploaded](/ddc/3.-coding/upload.md) the firmware to your controller, you can connect to SimHub:
* Go to devices, utilities in top right corner and select "Device definition authoring tools"
* Select new device definition and name the device
* Follow instructions for setting up the device page with branding and image
* Scroll down to add LEDs and a VoCore screen if needed
* You can also define which LEDs do what by sorting your LEDs in the section below
* Set the LED count and edit the physical LED mapping if wanted
* Set communication to Standard SimHub Serial protocol and enter your VID/PID
* Save definition!
* Now you can add a new device
* Find the definition you made and add it!
