@Alex-Kushleyev , Thanks for the response!

VOXL 2 mounted on the VOXL 2 Developer Test Board.
CP2102 USB-to-UART dongle connected to my PC.
For QUP19 (ttyHS2):

GPIO_2 (TX) connected to RX on CP2102 via JP1 (for level shifter) and J9
GPIO_3 (RX) connected to TX on CP2102 via JP1 (for level shifter) and J9
GND to GND

on the voxl2:

stty -F /dev/ttyHS2 115200
cat /dev/ttyHS2

echo "Hello from VOXL2 HS2" > /dev/ttyHS2

on my PC:
OS: Ubuntu 22.04

screen /dev/ttyUSB0 115200

When I send text from the PC side, I expect it to appear in the cat output on VOXL2, and vice versa.

with /dev/ttyHS1 it works.

@Alex-Kushleyev

thanks for replying.
I'm using the dev test board but couldn't establish the comm

any ideas?

B.R

Hi everyone

I'm working on a VOXL 2, M0054 , voxl2_SDK_1.4.1

I’ve successfully used /dev/ttyHS1 (QUP7) via J3, but I’m currently trying to enable and use:

/dev/ttyHS2 → QUP19 (GPIO 2 and 3, J5 pins 48 and 49)

/dev/ttyHS3 → QUP13 (GPIO 38 and 39, J5 pins 97 and 98)

These devices show up in /dev, but the corresponding pins remain unclaimed in the pinctrl debug output:

cat /sys/kernel/debug/pinctrl/*/pinmux-pins | grep -E 'GPIO_2|GPIO_3|GPIO_38|GPIO_39'

pin 2 (GPIO_2): 894000.qcom,qup_uart (GPIO UNCLAIMED) function qup19 group gpio2  
pin 3 (GPIO_3): 894000.qcom,qup_uart (GPIO UNCLAIMED) function qup19 group gpio3  
pin 38 (GPIO_38): a94000.qcom,qup_uart (GPIO UNCLAIMED) function qup13 group gpio38  
pin 39 (GPIO_39): a94000.qcom,qup_uart (GPIO UNCLAIMED) function qup13 group gpio39 

How can I claim it to UART?

Many Thanks!