# Orqa/ GHST setup un PX4

Source: https://forum.modalai.com/topic/4217/orqa-ghst-setup-un-px4
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2025-02-27 17:21:55 UTC by pordpatrik
Replies: 0 · Views: 246

## pordpatrik · 2025-02-27 17:21:55 UTC

Hi!

I am working with main PX4 and trying to connect the Ghost/ Tramp Hybrid. I am reaching out to you since your documentation is the only thing I have found.
https://docs.modalai.com/orqa-ghost/
I am a little confused since the doc once says to connect the Serial to Rx  and once Tx, the official documentation said Tx so I did that. I assume PX4 is configured to use Rx though.
Could you help me out how to modify the PX4 GHST driver to work with the Ghost? I have the driver running but it is just searching for signal on the Rx I think.
![62335bf4-4064-4b77-a686-aec5aded0779-image.png](https://forum.modalai.com/assets/uploads/files/1740676865247-62335bf4-4064-4b77-a686-aec5aded0779-image.png) 
This is the driver I am using:
https://github.com/PX4/PX4-Autopilot/blob/65a80dc8e66a387618239c20ab65a8b2a498e7f1/src/drivers/rc/ghst_rc/GhstRc.cpp#L113

Many thanks in advance!