Tony,
I looked a little bit deeper into your issue with Multi-Tech MTCBA-G-
EN-F4 modem.
I actually have such a device now on my desk as I found it rather neat
to have it on ethernet. Saves a computer and USB to serial for my test
modem banks.
There are two things to be changed for it to work with Kannel:
a) after connecting a tcp session, a telnet handshake has to be done
(that part i find rather strange). So some exchange of escape
sequences has to be done.
b) after that exchange, the user is prompted with Login: and Password:
before he gets access to the AT commands.
tcp connections are supported in kannel (device=rawtcp, host=...
port=...) but above stops your device from working.
I'll see that I can make a patch for this device by extending kannel
to support smsc-username/smsc-password on at-commands to log in as
well as to add the telnet handshake.
On 19.06.2008, at 00:08, Tony Kirkham wrote:
I have not been able to make any headway on this. If anyone has any
ideas, that would help, I would greatly appreciate it.
Thanks,
-Tony
On Sat, Jun 7, 2008 at 1:27 PM, Tony Kirkham
<[EMAIL PROTECTED]> wrote:
Hi, guys,
I'm back with more questions. I am still trying to get kannel to
talk to a Multi-Tech MTCBA-G-EN-F4 modem that connects via an
ethernet port.
If you have good knowledge of the smsc_at driver code I could really
use your help.
I have been hacking away at the smsc_at.c code and have wrapped the
code to detect the modem speed in an
if ( privdata->is_serial ) { ... }
statement so that this won't be attempted because, apparently, you
cannot detect this modems speed.
I thought this would solve my problem but, alas, it did not. I have
now worked my way down into the at2_read_buffer() call and I think
that this is where the problem is occurring. I have placed a few
DEBUG log file writes in locations to show what is happening. I am
completely new to communicating to modems and via raw tcp so I do
not know what should be expected. However, I don't think the
at2_read_buffer() call is getting anything. Below, is a reduced log
file for the at device containing what is written from a startup -
shutdown cycle of bearerbox.
The biggest indicators that I see are that privdata->lib = strange
characters and at2_read_line() never finds an end-of-line
character. The at2_read_buffer() call only executes a read the
first time for the first AT command. After that it seems like the
state of something is stuck because the select() call only returns 0
causing the at2_read_buffer() call to return NULL before the read()
is attempted.
If anyone has some insight into this I would greatly appreciate it.
I am using the code in the source download. I have not pulled
anything from the cvs repository.
Thank you very much,
-Tony
log file
1 2008-06-07 12:51:06 [15527] [6] INFO: AT2[vzn00]: opening
device
2 2008-06-07 12:51:06 [15527] [6] DEBUG: AT2[vzn00]: device
opened
3 2008-06-07 12:51:06 [15527] [6] INFO: AT2[vzn00]: init device
4 2008-06-07 12:51:06 [15527] [6] DEBUG: AT2[vzn00]: --> ATZ^M
5 2008-06-07 12:51:06 [15527] [6] DEBUG: AT2[vzn00]: --> ATZ^M
-response: 4
6 2008-06-07 12:51:06 [15527] [6] DEBUG: in
at2_wait_modem_command: before while cur_time <= end_time
7 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer:
after select, ret: 1
8 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer:
before read, ret: 1
9 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer:
after read, s: 12
10 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
11 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_line if
eol == -1 will return NULL eol: -1
12 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer:
after select, ret: 0
13 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
14 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line if
eol == -1 will return NULL eol: -1
... 1000's of repetitions of the above 3 lines ...
15 2008-06-07 12:51:10 [15527] [6] DEBUG: in
at2_wait_modem_command: Out of loop: cur_time: 1212864670, end_time:
1212864669
16 2008-06-07 12:51:10 [15527] [6] ERROR: AT2[vzn00]: Wrong or
no answer to ATZ, ignoring
17 2008-06-07 12:51:10 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M
18 2008-06-07 12:51:10 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M -
response: 3
19 2008-06-07 12:51:10 [15527] [6] DEBUG: in
at2_wait_modem_command: before while cur_time <= end_time
20 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_buffer:
after select, ret: 0
21 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
22 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line if
eol == -1 will return NULL eol: -1
... 1000's of repetitions ...
23 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_buffer:
after select, ret: 0
24 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
25 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line if
eol == -1 will return NULL eol: -1
26 2008-06-07 12:51:14 [15527] [6] DEBUG: in
at2_wait_modem_command: Out of loop: cur_time: 1212864674, end_time:
1212864673
27 2008-06-07 12:51:14 [15527] [6] ERROR: AT2[vzn00]: Wrong or
no answer to AT. Trying again
28 2008-06-07 12:51:14 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M
29 2008-06-07 12:51:14 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M -
response: 3
30 2008-06-07 12:51:14 [15527] [6] DEBUG: in
at2_wait_modem_command: before while cur_time <= end_time
31 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_buffer:
after select, ret: 0
32 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
33 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line if
eol == -1 will return NULL eol: -1
... 1000's of repetitions ...
34 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_buffer:
after select, ret: 0
35 2008-06-07 12:51:18 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
36 2008-06-07 12:51:18 [15527] [6] DEBUG: in at2_read_line if
eol == -1 will return NULL eol: -1
37 2008-06-07 12:51:18 [15527] [6] DEBUG: in
at2_wait_modem_command: Out of loop: cur_time: 1212864678, end_time:
1212864677
38 2008-06-07 12:51:18 [15527] [6] ERROR: AT2[vzn00]: Second
attempt to send AT failed
39 2008-06-07 12:51:18 [15527] [6] ERROR: AT2[vzn00]: Opening
failed. Terminating
40 2008-06-07 12:51:18 [15527] [6] INFO: AT2[vzn00]: closing
device
41 2008-06-07 12:51:18 [15527] [6] INFO: AT2[vzn00]: closing
device
42 2008-06-07 12:51:18 [15527] [6] DEBUG: Thread 6 (gw/smsc/
smsc_at.c:at2_device_thread) terminates.
