# Starting the HITL mode for VOXL2

Source: https://forum.modalai.com/topic/3658/starting-the-hitl-mode-for-voxl2
Category: VOXL 2 and VOXL 2 Mini (https://forum.modalai.com/category/26/voxl-2-and-voxl-2-mini)
Tags: voxl-2
Posted: 2024-07-19 08:55:33 UTC by cy208183395
Replies: 3 · Views: 630

## cy208183395 · 2024-07-19 08:55:33 UTC

Hello, I followed the tutorial(https://docs.modalai.com/voxl2-PX4-hitl/) to set up the simulation environment and **disabled px4 and qvio**.：
![2024-07-19 15-57-48屏幕截图.png](https://forum.modalai.com/assets/uploads/files/1721379167586-2024-07-19-15-57-48屏幕截图.png) 

Then I ran 
```
voxl-px4-hitl
``` 
and used the command 
```
qshell dsp_hitl status
``` 
to query the status of the HITL driver：

![2024-07-19 15-57-00屏幕截图.png](https://forum.modalai.com/assets/uploads/files/1721379183216-2024-07-19-15-57-00屏幕截图.png) 

Why is there no data?

I am connecting to VOXL2 via t**ype-c to adb.** Could this be related to the issue? (I did not connect the ****JST connector to the VOXL2 J18 port****)

If the pins of VOXL2 are not connected, **please tell me where the J18 port of VOXL2 (VOXL2 Starlight) is located**. Thank you very much for your help!

## Reply by Eric Katzfey (ModalAI staff) · 2024-07-19 16:10:39 UTC

@cy208183395 The HITL commands come over the serial link. Since you have not attached a serial link you are not getting any commands.

## Reply by cy208183395 · 2024-07-20 05:22:42 UTC (in reply to Eric Katzfey)

@Eric-Katzfey 
So, am I because I didn't connect the JST connector to the VOXL2 J18 port.
The original type-c connection is not able to read data?

## Reply by Eric Katzfey (ModalAI staff) · 2024-07-20 17:48:43 UTC (in reply to cy208183395)

@cy208183395 You have to follow all steps. The serial cable must be used.