# PX4 DISCONNECTED FROM UART

Source: https://forum.modalai.com/topic/1639/px4-disconnected-from-uart
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2022-12-22 10:46:41 UTC by 張為超
Replies: 4 · Views: 1169

## 張為超 · 2022-12-22 10:46:41 UTC

Hello, I can't connect my seeker to QGC. I have already reconfigured voxl-vision-px4 and voxl-mavlink-server  to the factory setting and both of them are enabled and running.

But when I look into it by using status -l voxl-vision-px4, it says:
```
Jan 01 00:00:09 apq8096 voxl-vision-px4[2589]: WARNING: connected to voxl-mavlink-server but no messages from PX4
```
![Screenshot 2022-12-22 18:19:27.png](https://forum.modalai.com/assets/uploads/files/1671704765855-screenshot-2022-12-22-18-19-27.png) 

And when I check voxl-mavlink-server, it says 
```
Jan 01 00:00:10 apq8096 voxl-mavlink-server[2710]: PX4 DISCONNECTED FROM UART
```
![Screenshot 2022-12-22 18:19:50.png](https://forum.modalai.com/assets/uploads/files/1671704953946-screenshot-2022-12-22-18-19-50.png) 

Here is my mavlink.conf on seeker
![Screenshot 2022-12-22 18:18:39.png](https://forum.modalai.com/assets/uploads/files/1671705254725-screenshot-2022-12-22-18-18-39.png) 

I already try my best to fix this and gets no luck...... So hope you guys can help me with it. 

Sorry for interrupt your Christmas vacation.:disappointed_relieved:

## Reply by Chad Sweet (ModalAI staff) · 2022-12-22 16:11:37 UTC

Could the cabling between the VOXL and Flight Core have become disconnected? The connections should look like the image below

![seeker-cabling.jpg](https://forum.modalai.com/assets/uploads/files/1671725641287-seeker-cabling-resized.jpg)

## Reply by 張為超 · 2022-12-23 02:35:00 UTC (in reply to Chad Sweet)

@Chad-Sweet Thanks for your quick response.:relaxed:  

I check the cable between them and it looks good to me. I also re-plugged some of them and check mavlink status, still shows disconnected.
  
![320389185_1637444563386482_3471786983097419275_n.jpg](https://forum.modalai.com/assets/uploads/files/1671762698181-320389185_1637444563386482_3471786983097419275_n.jpg)

## Reply by 張為超 · 2022-12-27 03:27:49 UTC

Quick update, mavlink suddenly connected yesterday, but after few minutes it disconnected again. Since I didn't change any of  setting, so I think it's bad contact causing the disconnection. What do you guys think of this?

## Reply by Chad Sweet (ModalAI staff) · 2022-12-27 05:17:14 UTC

yes, it sounds like a cable is not connected or was damaged somehow