Send messages to serial USB terminal (Android app)

[Qlexio]

Hello,

I'm trying to send messages to an android app called Serial USB Terminal. I'm using the following code to write a message:

import serial

ser = serial.Serial(port='/dev/cu.usbserial-1130', 
                    baudrate=19200, 
                    bytesize=serial.EIGHTBITS, 
                    parity=serial.PARITY_NONE, 
                    stopbits=serial.STOPBITS_ONE, 
                    timeout=1, 
                    xonxoff=False, 
                    rtscts=False, 
                    write_timeout=30, 
                    dsrdtr=False, 
                    inter_byte_timeout=None, 
                    exclusive=None)

if ser.is_open:
    ser.open()

print(ser.write("test".encode()))

ser.flush()

ser.close()

The issue is that the messages doesn't appear on the app terminal, like nothing is being received. I leave here some screenshots of the app:

I've already tried on a M1 as well as on a Windows 11 machine with no luck whatsoever.
Thanks

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This issue has been cloned from: pyserial#762