off-topic? AT-commands - Forums

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does someone know how to read out the COM-Port, or more detailed, an attached modem and the AT-commands?:confused:

don't get it wrong, i'm not asking for code...but since i know that many people here have truly great knowledge, i decided to ask here.

maybe a simple overview of how to approach this problem?
i don't even know whats coming from the modem (ASCII?)
a hyperlink would be great, too.

thanks in advance

Posted on 2001-12-31 09:58:57 by sys64738

off-topic? AT-commands

Open the com port for R/W.

Hayes Compatible modem commands:



Dialing:

ATDT9W555-1212    Tone dial 9, wait, 5551212

ATDP              Pulse dial

ATH0              Hang up

ATA               Answer

ATO               Resume communication -- Use after sending +++ to drop into command mode

ATS0=1            Answer when ring occurs



Config:

AT&F              Reset to factory settings

AT&W              Store (FLASH) current config

ATZ               Restore FLASHED config (as done on modem power up)

ATB0              V.22 1200 baud

ATB1              Bell 212A 1200 baud

ATE0              No command echo

ATE1              Echo commands

ATL1              Low speaker volume

ATL2              Med

ATL3              High

ATM0              Speaker always off

ATM1              On during dialing

ATM2              Always on

AT&CO             Carrier Detect (CD) always on

AT&C1             CD when connection present

AT&D1             Modem ignore DTR

AT&D2             Hangup when DTR goes off

AT&D3             Hangup and reset when DTR goes off

The modem should transmit at the rate you send data to it. Once connect to a remote machine, pause for 1 sec, send +++, pause 1 sec, and the modem will switch into command mode (it will send you OK). Use ATO to switch out.

Posted on 2001-12-31 16:08:03 by eet_1024

off-topic? AT-commands

happy new year

Open the com port for R/W.

:o that's my problem. i did it once under pascal, but i don't know how to accomplish this with API under windows.
how would you start opening the COM-port?
thank you anyway

Posted on 2002-01-01 07:39:09 by sys64738

off-topic? AT-commands

You can open the file "COM1" with CreateFile to get access to the COM port, and then use Read/WriteFile to communicate.
Look in the index of win32.hlp for 'communications' (overview), you will find most of the info there.

Thomas

Posted on 2002-01-01 14:06:21 by Thomas

hey

thank you, now i know in which direction to go

Posted on 2002-01-03 12:36:21 by sys64738

ever tried to send a wav over the modem?

any suggestions on sending a wave over the modem ?

Posted on 2003-01-16 03:00:26 by Azrim

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