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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

faxstate

FAXSTATE(8)						      System Manager's Manual						       FAXSTATE(8)

NAME

       faxstate - control ``modem state'' of a device used by HylaFAX

SYNOPSIS

       /usr/sbin/faxstate [ -q queue-dir ] [ -s state ] [ -n ] modem

DESCRIPTION

       faxstate  sends	a  message  to	the  HylaFAX  faxgetty(8) process servicing modem telling it to use the specified state when notifying the
       HylaFAX scheduler that a modem is ready and available for use.  This is useful for controlling outbound	use  of  a  modem;  by	marking  a
       modem's state as busy or down the HylaFAX scheduler will not assign any outbound jobs to the modem.

       The  specified  modem can either be the name (typically the last component of the terminal port the modem is attached to), or the full name
       of the associated FIFO named pipe file, e.g. ``FIFO.ttym2''.

       If the -n option, faxstate emulates what faxgetty would do; sending a message directly to the faxq  process  marking  the  specified  modem
       down,  busy,  or  ready.   This	interface is useful for send-only environments in which faxgetty processes are not used.  Note that modems
       manipulated in this way must previously have been configured with the faxmodem(8) program.

OPTIONS

       The following options are supported:

       -n	 Contact faxq directly instead of faxgetty.

       -q dir	 Use a spooling area other than /var/spool/hylafax.

       -s	 Specify the state to send the faxq process each time the modem becomes ready for use; one of ``busy'', ``down'',  and	``ready''.
		 The default state to use is ready.

FILES

       Consult hylafax-server(5) for a complete discussion of the structure and content of the spooling area.

SEE ALSO

       hylafax-server(5), faxgetty(8)

								   July 17, 1995						       FAXSTATE(8)
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