PA3 and PA2 not in pinout pdf

[EduMota]

I'm trying to identify the pins PA3 and PA2 on the skr mini e3 v3, but they are not listed at board pinout pdf.

I want to check the connections to make sure that everything is ok, because I follow the setup recommended here, but without result, my board not respond to klipper, and continue getting the error mcu 'mcu': Unable to connect Once the underlying issue is corrected, use the "FIRMWARE_RESTART" command to reset the firmware, reload the config, and restart the host software. Error configuring printer

[radek8]

PA2 and PA3 There are RX and TX pins on the TFT connector.

[EduMota]

Then I think some thing is off.

My printer.cfg

My /boot/config.txt

My /boot/cmdline.txt

My connections on skr mini.

My connections on raspberry pi 3 b+

Pinout of raspberry:

[radek8]

I won't help you. I don't use Raspberry or Klipper.

[EduMota]

Ok, now it's working, for someone with the same issue, that is how I figured out.

I plugged an usb/ttl adapter on raspberry and my notebook, on Linux host executed:

minicom -b <baud rate> -D <serial>

logged at raspberry by ssh, and executed:

echo 'Hello world' > /dev/ttyAMA0

Trying some common values from baud rate, intill I got the correct message on minicom. I could find out that my raspberry was with a high baud rate 300000, so I just recompile Klipper and flash it on printer board, and in printer.cfg added the

[mcu]
baud:300000