I am trying to automate my test process where I send some commands to Linux core on my TI board via putty terminal and as response, I see console print on putty from the core. I am automating this using python and pyserial. I have a problem where some of the output prints are very large and sometimes will not stop until control+c is pressed. I am currently doing it manually but How can I automate it?

I have tried :

serial.write(r'\x03' + '\n')
serial.write(b'\x03')