> 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"

<figure><img src="/files/gKRCHjoN2jvhxnvVuCx4" alt=""><figcaption></figcaption></figure>

* Select new device definition and name the device

<figure><img src="/files/H8XHKT79lWvIFI49rOo4" alt=""><figcaption></figcaption></figure>

* Follow instructions for setting up the device page with branding and image

<figure><img src="/files/XlYHvH0Sa6dE2VI60PYE" alt=""><figcaption></figcaption></figure>

* Scroll down to add LEDs and a VoCore screen if needed

<figure><img src="/files/eqJvGu5V4Ly2QBIz0EfR" alt=""><figcaption></figcaption></figure>

* You can also define which LEDs do what by sorting your LEDs in the section below

<figure><img src="/files/H0KeFu63rpaSbdwCzp1U" alt=""><figcaption></figcaption></figure>

* Set the LED count and edit the physical LED mapping if wanted

<figure><img src="/files/iPPBpeOsvq9r1MdKzgSh" alt=""><figcaption></figcaption></figure>

* Set communication to Standard SimHub Serial protocol and enter your VID/PID

<figure><img src="/files/657SwtkpjQvWQfb6Jl4n" alt=""><figcaption></figcaption></figure>

* Save definition!

<figure><img src="/files/Xkwh8fri4dINwPM3ck93" alt=""><figcaption></figcaption></figure>

* Now you can add a new device

<figure><img src="/files/cbrxAbFTiUzBhyPxSUxH" alt=""><figcaption></figcaption></figure>

* Find the definition you made and add it!

<figure><img src="/files/z2AUPVpHq0cpFjWn98yZ" alt=""><figcaption></figcaption></figure>