Basically, from macOS Terminal, I can connect via the serial port like this:

ls -l /dev/tty.*

get the name of the device and then:

screen /dev/tty.usbmodem11104 115200

and I need to enter username/password, and once I am connected and can type commands like ls, ps, etc

to quit: Ctrl+A + Ctrl+\

I want to achieve this from Mathematica, so I have tried:

Wolfram Language 13.0.1 Engine for Mac OS X ARM (64-bit)
Copyright 1988-2022 Wolfram Research, Inc.

In[1]:= port = "/dev/tty.usbmodem11104"                                         

Out[1]= /dev/tty.usbmodem11104

In[2]:= dev = DeviceOpen["Serial", {port, "BaudRate" -> 256000}]                                                                                                                  

Out[2]= DeviceObject[{Serial, 1}]

In[3]:= DeviceWrite[dev, "ps"]                                                                                                                                                    

Out[3]= ps

In[4]:= DeviceReadBuffer[dev]                                                                                                                                                     

Out[4]= {112, 115}

In[5]:= DeviceClose[dev]

But it doesn't work, also I am a newbie, so I must have written the above wrong. Also, I need to somehow enter username/password.