picocom to see /dev/ttyATH0 message is ??? and Console telnet problem

Hello: I have two problem about to output sketch message
First:
I got a problem about serial output.
I use serial.print(“message”); in sketch,and I hope to see the message in ssh terminal.
I find http://forum.arduino.cc/index.php?topic=219602.0
and try ’ picocom -b 115200 /dev/ttyACM0 ’ command
the picocom from opkg version is 1.7
but my terminal output is ? ? ? ? ? ? ? ? ?.
If I set baudrate to 9600 , there were nothing show on terminal (only the Terminal ready on Screen).

Second :
When I use "telnet localhost 6571 to see Console output ,it is ok at first time but fail when I try to next time .

Does anyone have the same problem or method ?

Thank you .

Why are you doing this?

Did you recently buy a Yun? Do you know the company has split into two (2)?

Jesse

jessemonroy650: Why are you doing this?

Did you recently buy a Yun? Do you know the company has split into two (2)?

Jesse

Yes, I buy it . I don't very clear understand this message,does it have any problem?

seanwang720130: Yes, I buy it . I don't very clear understand this message,does it have any problem?

There are three (3) questions. Please answer all three question - completely.

Jesse