possible reasons of cryptic characters in Minicom output

Martin T m4rtntns at gmail.com
Mon Sep 19 22:26:07 UTC 2011


No, this radio device is not accessible from other computer as well. I
tried with Minicom under OpenSUSE and the very same issue appeared. I
have tried with spare radio device(identical model), but still no
connection over RS232. On the other hand I can connect to Cisco
equipment over console port without problems.
Are there methods/techniques to pinpoint the problem? I mean once I
see the Rx led of the DE9<->USB adapter blink when I hit a key on my
keyboard, I can probably assume, that physical connectivity is correct
because the device responds something? Now is it somehow possible to
make sure, that bit rate is correct? Or is it possible to find out the
correct parity? Or is this just reading the documentation +
trial-and-error? :)


regards,
martin

2011/9/19 Adam Lackorzynski <adam at os.inf.tu-dresden.de>:
>
> On Mon Sep 19, 2011 at 02:42:37 +0300, Martin T wrote:
>> 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?
>
> On Mon Sep 19, 2011 at 10:02:01 +0300, Martin T wrote:
>> 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?
>
> Not really as you tried any communication config variant. Is it working
> with another system?
>
>
>
> Adam
> --
> Adam                 adam at os.inf.tu-dresden.de
>  Lackorzynski         http://os.inf.tu-dresden.de/~adam/
>



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