# Apps proc UART on standard VOXL2

Source: https://forum.modalai.com/topic/4751/apps-proc-uart-on-standard-voxl2
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2025-09-18 20:51:14 UTC by jon
Replies: 1 · Views: 420

## jon · 2025-09-18 20:51:14 UTC

Hi, I am trying to hook up an external FCU for a sensors test over uart to the standard m0054 VOXL2 (with ethernet hub addon M0062). Looking at the pinouts, I'm seeing references to a lot of QUP uart ports - are any of those accessible to the applications processor (i.e. at /dev/ttyXX)? If so, how will I know which physical port corresponds to which uart?

## Reply by tom (ModalAI staff) · 2025-09-18 20:53:48 UTC

@jonathankampia There is some relevant info here: https://docs.modalai.com/voxl2-external-flight-controller/
M0062 is more rare of a product for us so isn't listed there but you can find more info here: https://docs.modalai.com/m0062-datasheet/#j9---2w-uart--i2c-port