possible reasons of cryptic characters in Minicom output

Martin T m4rtntns at gmail.com
Mon Sep 19 07:02:01 UTC 2011


I tried with "19200 8N1"(no "Hardware Flow Control" and no "Software
Flow Control") settings and using the empty modem "init string", but
still nothing:

<<<<<
Welcome to minicom 2.3

OPTIONS: I18n
Compiled on Oct 22 2009, 15:57:59.
Port /dev/cuaU0

               Press CTRL-A Z for help on special keys



>>>>>

If I press any key on my keyboard, I see both Rx and Tx led blink on
my DE9<->USB RS232 adapter. Any ideas, what might be the problem?


regards,
martin


2011/9/19 Martin T <m4rtntns at gmail.com>:
> Adam,
> I should see a command prompt of this radio device which I can use for
> configuration(similar for example to Cisco equipment). At the moment I
> get those Hayes modem initialization commands echoed back, but for
> some reason I still can't see the CLI even if I press enter multiple
> times- just nothing happens. If I type random keys, I can see
> following characters appearing to the screen:
>
>  <<<<<
> Welcome to minicom 2.3
>
> OPTIONS: I18n
> Compiled on Oct 22 2009, 15:57:59.
> Port /dev/cuaU0
>
>              Press CTRL-A Z for help on special keys
>
> ������������������������������������������������AT S7=45 S0=0 L3 V1 X4
> &c1 E1 Q0
>
>>>>>>
>
>
> Any suggestions, what might be wrong?
>
>
> regards,
> martin
>
>
> 2011/9/18 Adam Lackorzynski <adam at os.inf.tu-dresden.de>:
>>
>> On Sun Sep 18, 2011 at 19:22:39 +0300, Martin T wrote:
>>> Adam,
>>> indeed. Under "Modem and dialing" configuration I have a following
>>> "Init string":
>>>
>>> ~^M~AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0^M
>>>
>>> ..which is exactly the one printed by Minicom. Thanks for pointing
>>> this out! However, how could this modem init string sent by Minicom
>>> interfere the serial communication? I mean even if I empty the "Init
>>> string", how could this help to establish serial communication with
>>> this radio device I mentioned? Because I don't mind the modem init
>>> sequence printed- the main goal is to establish a communication with
>>> the radio device but I'm out of ideas because the speed and other
>>> parameters seem to be correct, and two-way communication works..
>>
>> What are you expecting to happen given that the communication should be
>> working?
>>
>>
>>
>> Adam
>> --
>> Adam                 adam at os.inf.tu-dresden.de
>>  Lackorzynski         http://os.inf.tu-dresden.de/~adam/
>>
>



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