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Use picocom – sending request

I’m sorry, but I don’t understand how use picocom to send a request/command to the device. Official doc: http://linux.die.net/man/8/picocom

I want to be IN the OS I reach, I connect to an Arduino YUN using linux OS inside and I want to be root on it, it’s probably easy, I’m already connected but I don’t understand what I have to do!

vado@ubuntu:~$ picocom -b 115200 /dev/ttyACM0
picocom v1.4

port is        : /dev/ttyACM0
flowcontrol    : none
baudrate is    : 115200
parity is      : none
databits are   : 8
escape is      : C-a
noinit is      : no
noreset is     : no
nolock is      : no
send_cmd is    : ascii_xfr -s -v -l10
receive_cmd is : rz -vv

Terminal ready

Terminal ready and I can do nothing, I can’t entering command line or whatever. I tried to do ce escape think with C-a but I don’t understand at all how enter C-a…

Need help, please. Thank you.

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Answer

With picocom you can communicate to a serial device. Once you open it, you have something similar to the arduino serial monitor but every character you type is directly sent to the arduino.
You can use putty if you don’t like picocom commands.

The escape commands C-a means: CRTL+A

To quit picocom, first press CRTL+A followed by a regular x.

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