# J19 uart

Source: https://forum.modalai.com/topic/2931/j19-uart
Category: VOXL 2 and VOXL 2 Mini (https://forum.modalai.com/category/26/voxl-2-and-voxl-2-mini)
Tags: voxl-2-mini
Posted: 2023-12-08 22:48:20 UTC by mkriesel
Replies: 3 · Views: 1103

## mkriesel · 2023-12-08 22:48:20 UTC

I am trying to access the uart port QUP7 on pin 10/11 on J19 on my voxl2 mini as specified is available in 
https://docs.modalai.com/voxl2-linux-user-guide/#slpi-proc

however I'm not sure I understand exactly how to do that, I know I'm supposed to use libqrb5165-io but I don't really know how. I tried using it and I keep getting this as the output and I was hoping for some clarification  on how to enable uart on the port

![Screenshot from 2023-12-08 14-35-39.png](https://forum.modalai.com/assets/uploads/files/1702074953255-screenshot-from-2023-12-08-14-35-39.png) 

I'm on sdk 1.1.1

## Reply by tom (ModalAI staff) · 2023-12-08 23:25:45 UTC

@mkriesel Do you have a loopback cable from pin 10 to 11 connected to J19? If not then that is the expected output

## Reply by mkriesel · 2023-12-09 01:16:29 UTC (in reply to tom)

@tom I thought I did but it wasn't in properly I tested it again and I got sucess.
 so this confirms that uart is working correct? and then for using it in my own program I could use the same things I see in the test program with #include <voxl_io.h> and then all the same voxl_uart functions used in the program yeah?
Thanks.

## Reply by tom (ModalAI staff) · 2023-12-10 22:04:13 UTC (in reply to mkriesel)

@mkriesel Yep, exactly