Chat with modem during ppp connection

Question

I have a GPRS modem that I use with a PPP connection in an embedded Linux ; I need to get the modem hour while the connection is active, and for that I would like to use AT commands. But I have no idea how to send these commands to the modem...

I tryed with chat but it doesn't work the way I want, do you know how we can do this ? Send commands and get the return

Thanks !

What specific brand and model of modem? How is the modem connected to your embedded system (i.e. USB, serial hardware, etc..)? — Mike Pennington, Dec 28 '11 at 10:37
Don't known the specific brand/model sadly, but it's connected by serial ;) — Jérémy Dutheil, Dec 28 '11 at 10:38

score 2 · Answer 1 · answered Dec 28 '11 at 09:09

2

If your modem supports GSM07.11 multiplexer, then you may use it. One channel for pppd (or other ppp daemon) and other channel for AT commands.

answered Dec 28 '11 at 09:09

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I don't think it supports, sadly ; anyway, we can shut down the connexion but how can I do that by using chat ? Nothing seems to work for now :/ – Jérémy Dutheil Dec 28 '11 at 09:28

score 1 · Accepted Answer · answered Dec 28 '11 at 10:41

I make serial connections all day long from linux with PuTTY. After you find which device the serial line is (as well as the baud rate/stop-bits/pairty/flow-control), then use the terminal and send your ascii AT commands.

Your terminal could be minicom, picocom, putty or the like.

If you like python, pyserial is another option

Chat with modem during ppp connection

2 Answers2