* [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
@ 2014-10-12 12:08 meino.cramer
2014-10-12 15:42 ` Kerin Millar
0 siblings, 1 reply; 7+ messages in thread
From: meino.cramer @ 2014-10-12 12:08 UTC (permalink / raw
To: Gentoo
Hi,
I want to send commands to ttyO1 (serial port on an embedded system).
The commands are one line each and terminated with CRL/LF (aka "DOS").
Since this will be done from a batch script, it should be possible
via commandline tools and non-interactively. The serial port is
already setup up the right way.
I tried
echo -n"blablabal\x0a\x0d"
, which was accepted (no error) but does not acchieve anything.
The command was cat'n'paste from the documentation of the manufacturer
of the chip (a GPS receiver module).
I tried different commands. All were directly send to /dev/null inside
the chip it seems...
Is there any other simple straight forward method of writing
successfully to a serial port (only RX/TX are connected) without
dealing with minicom or advanced serial port programming in C?
Thank you very much in advance for any help!
Best regards,
mcc
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
2014-10-12 12:08 [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!? meino.cramer
@ 2014-10-12 15:42 ` Kerin Millar
2014-10-12 22:22 ` Paul Colquhoun
0 siblings, 1 reply; 7+ messages in thread
From: Kerin Millar @ 2014-10-12 15:42 UTC (permalink / raw
To: gentoo-user
On 12/10/2014 13:08, meino.cramer@gmx.de wrote:
> Hi,
>
> I want to send commands to ttyO1 (serial port on an embedded system).
> The commands are one line each and terminated with CRL/LF (aka "DOS").
>
> Since this will be done from a batch script, it should be possible
> via commandline tools and non-interactively. The serial port is
> already setup up the right way.
>
> I tried
>
> echo -n"blablabal\x0a\x0d"
Firstly, this command is missing the -e switch. Secondly, the order of
the control characters is wrong. I would suggest the use of printf as it
has fewer pitfalls.
# printf '%s\r\n' "command"
--Kerin
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
2014-10-12 15:42 ` Kerin Millar
@ 2014-10-12 22:22 ` Paul Colquhoun
2014-10-13 1:36 ` Francisco Ares
0 siblings, 1 reply; 7+ messages in thread
From: Paul Colquhoun @ 2014-10-12 22:22 UTC (permalink / raw
To: gentoo-user
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On Sun, 12 Oct 2014 16:42:22 Kerin Millar wrote:
> On 12/10/2014 13:08, meino.cramer@gmx.de wrote:
> > Hi,
> >
> > I want to send commands to ttyO1 (serial port on an embedded
system).
> > The commands are one line each and terminated with CRL/LF (aka
"DOS").
> >
> > Since this will be done from a batch script, it should be possible
> > via commandline tools and non-interactively. The serial port is
> > already setup up the right way.
> >
> > I tried
> >
> > echo -n"blablabal\x0a\x0d"
>
> Firstly, this command is missing the -e switch. Secondly, the order of
> the control characters is wrong. I would suggest the use of printf as it
> has fewer pitfalls.
>
> # printf '%s\r\n' "command"
>
> --Kerin
Also, are you sure that the standard output of the script is connected to
the serial port? Try adding "> /dev/tty01" to the end of the echo/printf
command lines and see if that helps.
--
Reverend Paul Colquhoun, ULC. http://andor.dropbear.id.au/
Asking for technical help in newsgroups? Read this first:
http://catb.org/~esr/faqs/smart-questions.html#intro
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
2014-10-12 22:22 ` Paul Colquhoun
@ 2014-10-13 1:36 ` Francisco Ares
2014-10-13 9:06 ` Neil Bothwick
0 siblings, 1 reply; 7+ messages in thread
From: Francisco Ares @ 2014-10-13 1:36 UTC (permalink / raw
To: gentoo-user
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2014-10-12 19:22 GMT-03:00 Paul Colquhoun <paulcol@andor.dropbear.id.au>:
> On Sun, 12 Oct 2014 16:42:22 Kerin Millar wrote:
>
> > On 12/10/2014 13:08, meino.cramer@gmx.de wrote:
>
> > > Hi,
>
> > >
>
> > > I want to send commands to ttyO1 (serial port on an embedded system).
>
> > > The commands are one line each and terminated with CRL/LF (aka "DOS").
>
> > >
>
> > > Since this will be done from a batch script, it should be possible
>
> > > via commandline tools and non-interactively. The serial port is
>
> > > already setup up the right way.
>
> > >
>
> > > I tried
>
> > >
>
> > > echo -n"blablabal\x0a\x0d"
>
> >
>
> > Firstly, this command is missing the -e switch. Secondly, the order of
>
> > the control characters is wrong. I would suggest the use of printf as it
>
> > has fewer pitfalls.
>
> >
>
> > # printf '%s\r\n' "command"
>
> >
>
> > --Kerin
>
>
>
>
>
> Also, are you sure that the standard output of the script is connected to
> the serial port? Try adding "> /dev/tty01" to the end of the echo/printf
> command lines and see if that helps.
>
>
>
>
>
> --
>
> Reverend Paul Colquhoun, ULC. http://andor.dropbear.id.au/
>
> Asking for technical help in newsgroups? Read this first:
>
> http://catb.org/~esr/faqs/smart-questions.html#intro
>
>
>
Or, perhaps, /dev/ttyS0 , or even /dev/ttyUSB0, if it is connected through
a USB to serial adapter.
By using this approach, you might be able to send a command, but most
probably (never tried) will not be able to receive the device's reply.
Try minicom, a simple text serial console.
Good luck
Francisco
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
2014-10-13 1:36 ` Francisco Ares
@ 2014-10-13 9:06 ` Neil Bothwick
2014-10-13 9:08 ` Christian Groessler
0 siblings, 1 reply; 7+ messages in thread
From: Neil Bothwick @ 2014-10-13 9:06 UTC (permalink / raw
To: gentoo-user
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On Sun, 12 Oct 2014 22:36:55 -0300, Francisco Ares wrote:
> By using this approach, you might be able to send a command, but most
> probably (never tried) will not be able to receive the device's reply.
>
> Try minicom, a simple text serial console.
Or write the script in Python and use pyserial.
--
Neil Bothwick
Macro: (n.) a series of keystrokes used to simulate a missing but
essential command.
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
2014-10-13 9:06 ` Neil Bothwick
@ 2014-10-13 9:08 ` Christian Groessler
2014-10-13 13:32 ` thegeezer
0 siblings, 1 reply; 7+ messages in thread
From: Christian Groessler @ 2014-10-13 9:08 UTC (permalink / raw
To: gentoo-user
On 10/13/14 11:06, Neil Bothwick wrote:
> On Sun, 12 Oct 2014 22:36:55 -0300, Francisco Ares wrote:
>
>> By using this approach, you might be able to send a command, but most
>> probably (never tried) will not be able to receive the device's reply.
>>
>> Try minicom, a simple text serial console.
> Or write the script in Python and use pyserial.
Or use kermit.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!?
2014-10-13 9:08 ` Christian Groessler
@ 2014-10-13 13:32 ` thegeezer
0 siblings, 0 replies; 7+ messages in thread
From: thegeezer @ 2014-10-13 13:32 UTC (permalink / raw
To: gentoo-user
On 13/10/14 10:08, Christian Groessler wrote:
> On 10/13/14 11:06, Neil Bothwick wrote:
>> On Sun, 12 Oct 2014 22:36:55 -0300, Francisco Ares wrote:
>>
>>> By using this approach, you might be able to send a command, but most
>>> probably (never tried) will not be able to receive the device's reply.
>>>
>>> Try minicom, a simple text serial console.
>> Or write the script in Python and use pyserial.
>
> Or use kermit.
>
>
if you need interactivity you could also try dev-tcltk/expect
^ permalink raw reply [flat|nested] 7+ messages in thread
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2014-10-12 12:08 [gentoo-user] Writing to tty01 (serial port) in simple straight forward way...?!? meino.cramer
2014-10-12 15:42 ` Kerin Millar
2014-10-12 22:22 ` Paul Colquhoun
2014-10-13 1:36 ` Francisco Ares
2014-10-13 9:06 ` Neil Bothwick
2014-10-13 9:08 ` Christian Groessler
2014-10-13 13:32 ` thegeezer
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