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List: uclinux-dev
Subject: RE: [uClinux-dev] Connecting GPRS using PPP
From: "Steven Veigas" <sveigas () velankani ! com>
Date: 2007-04-27 6:28:31
Message-ID: 009901c78893$99815af0$362e000a () blr ! velankani ! com
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I have not worked on GPRS modem, but as per basic modem knowledge,
first u need to confirm that connection is established or not,
and than script, its better once run commands manually
and OK, CONNECT all those are not AT commands for the modem, those are the
responses from the modem,
so ur script should not contain OK, CONNECT etc,
try commands by sending to the modem
-------------------------
AT command
Command : AT [CR]
Response : OK
-------------------------
Reset command
Command : ATZ[CR]
Response : OK
-------------------------
Setting parameters
AT+CGDCONT=1,"IP","claro.com.br" [CR]
Response : OK
-------------------------
Dial command
ATDT*99***1#
Response : CONNECT
-------------------------
After all these successfull commands, run pppd applications, And check
whether ttyS1 is connected to modem,
pppd ttyS1 115200 noauth defaultroute noipdefault local connect "/bin/chat
-f /var/tmp/chat_script"
-Steven
-----Original Message-----
From: Roger Feltrin Escanhola [mailto:rescanhola@v2telecom.com.br]
Sent: Thursday, April 26, 2007 2:30 AM
To: uclinux-dev@uclinux.org
Subject: [uClinux-dev] Connecting GPRS using PPP
Hi,
I am trying to establish a GPRS connection using PPP in uClinux. I'm using a
Freescale M5208EVB (Coldfire) and my modem is a Siemens TC65 terminal. I
searched in internet and I found a good document teaching how to do this
(this is the link to the document
http://mailman.uclinux.org/pipermail/uclinux-dev/2004-August/027637.html) it
helped me to take the first steps but I am having problems to connect GPRS.
I used the com1 of my evaluation board connected to my desktop and the com2
connected to the modem. So I made a new kernel image with 'tip' to use in
uClinux as a terminal to send commands to the modem and it worked fine (I
could send AT commands to the modem and I received the answers). My problem
appears when I try the following command:
pppd ttyS1 115200 noauth defaultroute noipdefault local connect "/bin/chat
-f /var/tmp/chat_script"
the chat_script file has the following commands
"" ATZ OK AT+CGDCONT=1,"IP","claro.com.br" OK ATD*99***1# CONNECT
This command seems has no effect on modem. So I tried to test the 'chat' to
see if it was working properly. I tried to commands:
/>exec /bin/chat -v '' AT OK ATDT*99***1# CONNECT ''
AT
This first command just writes AT on screen and after timeout (about 30
sec.) the shell prompt returns and it has no affect on modem. So I tried:
/> exec /bin/chat -v '' AT^SMSO ''
ATMSO
Sash command shell (version 1.1.1)
The answer to this command is the second and the third line. This command
should turn the modem off, but it doesn't happen (AT^SMSO works if I send
the command from 'tip'), so I believe the problem is the chat program.
Does anybody has any suggestion? Am I using wrong command? Is there another
way to connect ppp without using chat?
Thanks
Roger
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<DIV><FONT face=Tahoma><FONT size=2><SPAN class=720282805-27042007><FONT
face=Arial color=#800080>I have not worked on GPRS modem, but as per basic modem
knowledge, </FONT></SPAN></FONT></FONT></DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN class=720282805-27042007><FONT
face=Arial color=#800080></FONT></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN class=720282805-27042007><FONT
face=Arial color=#800080>first u need to confirm that connection is established
or not,</FONT></SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>and than script, its better once run commands
manually</SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>and OK, CONNECT all those are not AT commands for the
modem, those are the responses from the modem,</SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>so ur script should not contain OK, CONNECT
etc,</SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT> </DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>try commands by sending to the
modem</SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>-------------------------</SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>AT command</SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>Command : AT [CR]
</SPAN></FONT></FONT></DIV>
<DIV><FONT><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT><FONT><FONT face=Arial
color=#800080 size=2><SPAN class=720282805-27042007>Response :
OK</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Tahoma><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>
<DIV><FONT size=+0><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>-------------------------</SPAN></FONT></FONT></DIV>Reset
command</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Tahoma><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>
<DIV><FONT size=+0><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>Command : ATZ[CR]
</SPAN></FONT></FONT></DIV>
<DIV><FONT size=+0><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT><FONT size=+0><FONT face=Arial
color=#800080 size=2><SPAN class=720282805-27042007>Response :
OK</SPAN></FONT></FONT></DIV></SPAN></FONT></FONT></DIV>
<DIV><FONT face=Tahoma><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>
<DIV><FONT face=Tahoma><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>
<DIV></SPAN></FONT></FONT><FONT face=Tahoma><FONT face=Arial color=#800080
size=2><SPAN class=720282805-27042007><FONT size=+0><FONT face=Arial
color=#800080 size=2><SPAN class=720282805-27042007><FONT size=+0><FONT
face=Arial color=#800080 size=2><SPAN
class=720282805-27042007>-------------------------</SPAN></FONT></FONT></DIV></DIV></SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></FONT></FONT></DIV>
<DIV><FONT><SPAN class=720282805-27042007>Setting parameters</SPAN></FONT></DIV>
<DIV><FONT><SPAN class=720282805-27042007>AT+CGDCONT=1,"IP","claro.com.br"
[CR] </SPAN></FONT></DIV>
<DIV><FONT><SPAN class=720282805-27042007>
<DIV><FONT size=+0><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT><FONT size=+0><FONT face=Arial
color=#800080 size=2><SPAN class=720282805-27042007>Response :
OK</SPAN></FONT></FONT></DIV>
<DIV><FONT size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial size=2><SPAN
class=720282805-27042007>-------------------------</SPAN></FONT></FONT>
<DIV><FONT face=Arial>Dial <SPAN
class=720282805-27042007> command</SPAN></FONT></DIV>
<DIV><FONT face=Arial><SPAN
class=720282805-27042007></SPAN></FONT></SPAN></FONT></FONT><FONT
face=Tahoma><FONT face=Arial size=2><SPAN class=720282805-27042007><FONT
size=+0><FONT face=Arial size=2><SPAN
class=720282805-27042007>ATDT*99***1#</SPAN></FONT></FONT></SPAN></FONT></FONT></DIV>
<DIV><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT><FONT size=+0><FONT face=Arial
size=2><SPAN class=720282805-27042007></SPAN></FONT></FONT><FONT size=+0><FONT
face=Arial color=#800080 size=2><SPAN class=720282805-27042007>Response :
CONNECT</SPAN></FONT></FONT></DIV>
<DIV>
<DIV><FONT size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial color=#800080
size=2><SPAN
class=720282805-27042007>-------------------------</SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT></DIV>
<DIV><FONT size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial color=#800080
size=2><SPAN class=720282805-27042007>After all these successfull commands, run
pppd applications, And check whether ttyS1 is connected to modem,
</SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT></DIV>
<DIV><FONT size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial color=#800080
size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT><FONT \
size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial size=2><SPAN
class=720282805-27042007><SPAN class=SpellE><SPAN class=GramE>pppd</SPAN></SPAN>
ttyS1 115200 <SPAN class=SpellE>noauth</SPAN> <SPAN
class=SpellE>defaultroute</SPAN> <SPAN class=SpellE>noipdefault</SPAN> local
connect "/bin/chat -f /<SPAN
class=SpellE>var/tmp/chat_script</SPAN>"</SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT></DIV>
<DIV><FONT size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial color=#800080
size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT> </DIV>
<DIV><FONT size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial color=#800080
size=2><SPAN
class=720282805-27042007><o:p>-Steven</o:p></SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT></DIV>
<DIV><FONT size=+0><FONT face=Arial size=2><SPAN class=720282805-27042007><SPAN
class=720282805-27042007><FONT face=Tahoma><FONT face=Arial size=2><SPAN
class=720282805-27042007><FONT size=+0><FONT face=Arial color=#800080
size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></FONT><FONT \
size=+0><FONT face=Arial color=#800080 size=2><SPAN
class=720282805-27042007></SPAN></FONT></FONT></SPAN></FONT><FONT face=Arial
color=#800080 size=2><SPAN
class=720282805-27042007></SPAN></FONT> </DIV></DIV></DIV></DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN
class=720282805-27042007> </SPAN>-----Original Message-----<BR><B>From:</B>
Roger Feltrin Escanhola [mailto:rescanhola@v2telecom.com.br] <BR><B>Sent:</B>
Thursday, April 26, 2007 2:30 AM<BR><B>To:</B>
uclinux-dev@uclinux.org<BR><B>Subject:</B> [uClinux-dev] Connecting GPRS using
PPP<BR><BR></DIV></FONT></FONT>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #800080 2px solid; \
MARGIN-RIGHT: 0px"> <DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: EN-US">Hi,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: EN-US">I \
am trying to establish a GPRS connection using PPP in <SPAN \
class=SpellE>uClinux</SPAN>. I’m using a <SPAN class=SpellE>Freescale</SPAN> \
M5208EVB (<SPAN class=SpellE>Coldfire</SPAN>) and my modem is a Siemens TC65 \
terminal. I searched in internet and I found a good document teaching how to do \
this (this is the link to the document <A
href="http://mailman.uclinux.org/pipermail/uclinux-dev/2004-August/027637.html">http://mailman.uclinux.org/pipermail/uclinux-dev/2004-August/027637.html</A>) \
it helped me to take the first steps but I am having problems to connect
GPRS.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: EN-US">I used the com1 of my
evaluation board connected to my desktop and the com2 connected to the modem.
So I made a new kernel image with ‘tip’ to use in <SPAN
class=SpellE>uClinux</SPAN> as a terminal to send commands to the modem and it
worked fine (I could send AT commands to the modem and I received the
answers). My problem appears when I try the following
command:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><SPAN style="mso-spacerun: yes"> </SPAN><SPAN class=SpellE><SPAN
class=GramE>pppd</SPAN></SPAN> ttyS1 115200 <SPAN class=SpellE>noauth</SPAN>
<SPAN class=SpellE>defaultroute</SPAN> <SPAN class=SpellE>noipdefault</SPAN>
local connect "/bin/chat -f /<SPAN
class=SpellE>var/tmp/chat_script</SPAN>"<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=GramE><FONT face="Times New Roman" size=3><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: EN-US">the</SPAN></FONT></SPAN><SPAN
lang=EN-US style="mso-ansi-language: EN-US"> <SPAN
class=SpellE>chat_script</SPAN> file has the following
commands<o:p></o:p></SPAN></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: EN-US">"" ATZ OK
AT+CGDCONT=1,"IP","claro.com.br" OK ATD*99***1#
CONNECT<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: EN-US">This command seems has no
effect on modem. So I tried to test the ‘chat’ to see if it was working \
properly. I tried to commands:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">/>exec /bin/chat -v '' AT OK ATDT*99***1# CONNECT \
''<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New Roman" \
size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">AT<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">This first command just writes AT on screen and after timeout (about 30 \
sec.) the shell prompt returns and it has no affect on modem. So I \
tried:<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New Roman" \
size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">/> exec /bin/chat -v '' AT^SMSO ''<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">ATMSO<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">Sash command shell (version 1.1.1)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">The answer to this command is the second and the third line. This command \
should turn the modem off, but it doesn’t happen (AT^SMSO works if I send the \
command from ‘tip’), so I believe the problem is the chat \
program.<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">Does anybody <SPAN class=GramE>has</SPAN> any suggestion? Am I using wrong \
command? Is there another way to connect <SPAN class=SpellE>ppp</SPAN> without \
using chat?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN lang=EN-US
style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">Thanks<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US">Roger<o:p></o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P> <P class=MsoNormal><FONT face="Times New \
Roman" size=3><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-ansi-language: \
EN-US"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>
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