# Modal Ai Voxl2 Mini HITL Request for Support

Source: https://forum.modalai.com/topic/3997/modal-ai-voxl2-mini-hitl-request-for-support
Category: VOXL SDK and Software (https://forum.modalai.com/category/47/voxl-sdk-and-software)
Posted: 2024-12-04 10:40:23 UTC by Eyucel
Replies: 1 · Views: 1742

## Eyucel · 2024-12-04 10:40:23 UTC

Hello everyone. I hope you are well and everything is fine. 

I am a voxl2 mini user. I bought this electronic card and I am using it according to the documentation. However, I encountered a problem somewhere. I want to simulate my Voxl2 mini card with HITL and I have set up the necessary setup. When I run it, I get the error I have posted. There is no information flow from the UART port, nor can I connect via docker. When I plug in the FTDI cable, the computer does not see it at all. However, when I plug in the UART converter, the computer sees it, but as I said, there is no information flow this time.

If I need to give more information;
![c.jpeg](https://forum.modalai.com/assets/uploads/files/1733308718972-c.jpeg) 
Here I tried connecting RX and TX in reverse and forward.
![b.jpeg](https://forum.modalai.com/assets/uploads/files/1733308727491-b.jpeg) 
Here I also tried connecting rx and tx straight and reverse

I would be very grateful if you could help me on this issue. Thank you very much for your help in advance, I wish you good work.

![a.jpeg](https://forum.modalai.com/assets/uploads/files/1733308809719-a.jpeg) 
![d.png](https://forum.modalai.com/assets/uploads/files/1733308757961-d.png) g) 
![e.png](https://forum.modalai.com/assets/uploads/files/1733308774501-e.png)

## Reply by Eric Katzfey (ModalAI staff) · 2024-12-04 15:59:59 UTC

@Eyucel To use PX4 HITL on VOXL 2 mini you need to connect to a DSP UART, not an applications processor UART. So, instead of using J10, you need to use a UART on J19 (Like the ESC UART pins 7 and 8).