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Full Discussion: How do I capture responses from the chat command?
Operating Systems Linux How do I capture responses from the chat command? Post 302494568 by Corona688 on Monday 7th of February 2011 04:36:41 PM
Old 02-07-2011
Quote:
Originally Posted by Bashingaway
I want to query the modem for it's manufacturer, product id and firmware version using AT commands.
What function does 'chat' serve in this? You should just be able to talk to the modem.

Code:
#!/bin/sh
# set up modem device to translate outgoing \n into \r\n
stty -F /dev/ttyS0 9600 -echo igncr icanon onlcr
# Open modem for reading and writing
exec 5</dev/ttyS0
exec 6>/dev/ttyS0

echo "AT+CGMI" >&6

# Eat the echo, then eat the blank line
read <&5 ; read <&5
# Read the actual response
read RESPONSE <&5

echo "Response was $RESPONSE"

# close the files
exec 5<&-
exec 6>&-

Code:
$ ./modem.sh
Response was ERROR
$

...mine returns 'ERROR' because it's not a cellphone so AT+CGMI means nothing to it. It responds 'OK' to plain 'AT'. Works in BASH, KSH, and ASH. If you have trouble, try 'cat <&5' to see what it's printing.
Last edited by Corona688; 02-07-2011 at 05:42 PM..
 

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LEARN ABOUT DEBIAN

sendpage::modem

Sendpage::Modem(3pm)					User Contributed Perl Documentation				      Sendpage::Modem(3pm)

NAME

       Sendpage::Modem.pm - extends the Device::SerialPort package

SYNOPSIS

	   $modem=Sendpage::Modem->new($params);
	   $modem->init($baud,$parity,$data,$stop,$flow,$str);
	   $modem->ready($functionname);
	   $modem->dial($areacode,$phonenumber,$timeout);
	   $modem->chat($send,$resend,$expect,$timeout,$retries,$dealbreaker,
	       $carrier);
	   $modem->hangup();

	   $str=Sendpage::Modem->HexStr("tab:	 cr:
");

DESCRIPTION

       This is a module for use in sendpage(1).

BUGS

       This needs more docs.

AUTHOR

       Kees Cook <kees@outflux.net>

SEE ALSO

       perl(1), sendpage(1), Sendpage::KeesConf(3), Sendpage::KeesLog(3), Sendpage::PagingCentral(3), Sendpage::PageQueue(3), Sendpage::Page(3),
       Sendpage::Recipient(3), Sendpage::Queue(3)

COPYRIGHT

       Copyright 2000-2003 Kees Cook.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.10.0							    2008-01-03						      Sendpage::Modem(3pm)
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