How to see Logcat?

Mena

I am using the Emteria Android over Raspberry Pi 3 B

Can someone provide me with some steps to enable me to see the logcat entries of my installed application?

I have the debug cable and followed these steps but can't find the device either in Android studio or in the ADB console.
https://developer.android.com/things/hardware/raspberrypi#serial-console

webhopper

Mena,
You might search for serial port conflicts. I've see references where the console uses the serial port and must be disabled to free the port up.

Also, you might consider using ADB over Ethernet instead of Serial :
Settings -> Emteria Additional platform settings
Enable ADB over Ethernet Reboot
Enable integrated SSH server Reboot
Maybe not needed for ADB but useful.