Re: Samsung A900 AT codes

I wrote a similar thing for testing all the AT commands for my Samsung
m520.  It also hangs after a few minutes.  Is this something that
affects all Sammys?

I couldn't find anything short of turning off/on the m520.  My code
would track progress in a file and always start at the point of the hang
from the previous run.  I'll dig it up and post the relevant code.

 

I've basically given up on the m520.  I can get it to respond to a small
set of AT commands, but nothing useful.

 

Regards. 
Mark K Vallevand

We old folks have to find our cushions and pillows in our tankards.
Strong beer is the milk of the old.
- Martin Luther


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From: [email protected]
[mailto:[email protected]] On Behalf Of David
Lonie
Sent: Sunday, July 13, 2008 11:54 AM
To: [email protected]
Subject: [BitPim-devel] Samsung A900 AT codes

 

I'm using the python script below (much of it adapted from WebSVN -
kryogenix.org - Rev 8 - /gnome-bluetooth-phones/trunk/backend.py
<http://svn.kryogenix.org/filedetails.php?repname=kryogenix.org&path=%2F
gnome-bluetooth-phones%2Ftrunk%2Fbackend.py&sc=1>  ) to try to discover
the AT+ codes for my samsung a900 in the eventual goal of being able to
access the calendar. The script works beautifully, generating AT+XXXX
codes and displaying the phone's response, but after a couple hundred
queries the phone stops responding and has to be restarted to continue.
Is there a linux command or a know AT+ code that will reset the
connection without restarting the phone? Having to restart the phone
every couple of minutes is really slowing this down. I'm new to working
with serial tty communications, so even if something should seem
obvious, I probably didn't try it :)

Also, I noticed that Stephen Wood wrote the existing framework for the
A900 in trunk. Do you (or anyone else) have any suggestions for getting
into the guts of the phone?


Here's the hacky little python script. It's not well commented, but it's
not that complex either :) Feel free to modify or use it as you see fit:

#  samsungATProbe.py
#  
#

import serial


start = 'GMM'           # Set the string to start at. 'GMM' is the first
code in the for loops below, since it is known to get a response from
the phone.
active = False                              

#initialize phone
def talk(send):  
        ph = serial.Serial('/dev/ttyUSB2', 115200, timeout=0.03)

        ph.flushOutput()
        ph.flushInput() 

#       send = 'at+gmm\r'
        ph.write(send)   
#       print "s = " + send
        eol, receive_data,blank_line = False, [], 0
        while eol != True:                         
                receive=ph.readline().strip()      
#               print "r = " + receive             
                if len(receive) > 0:               
                        if receive == send.strip() or receive =='OK' or
receive == 'ERROR':
                                print receive
                                continue
                        else:
                                print
"!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! " +
send
                                print receive
                else:
                        blank_line=blank_line+1
                if blank_line > 2: # Some output has a single blank line
within it, so we wait until we get two blank lines before assuming the
end of the output
                        eol = True
        ph.close()


if 1:
        for a in ['G', 'P', 'A', 'B', 'C', 'D', 'E', 'F', 'H', 'I', 'J',
'K', 'L', 'M', 'N', 'O', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',
'Z']: 
                for b in ['M', 'C', 'A', 'B', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
'W','X', 'Y', 'Z']:
                        for c in ['M',  'A', 'B', 'C', 'D', 'E', 'F',
'G', 'H', 'I', 'J', 'K', 'L', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U',
'V', 'W', 'X', 'Y', 'Z']:
                               for d in ['', 'A', 'B', 'C', 'D', 'E',
'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'S', 'T',
'U', 'V', 'W', 'X', 'Y', 'Z']:# No 'R'!!!
                                        if a+b+c+d == start:
                                                active = True
                                        if active:
                                                talk("AT+"+a+b+c+d+'\r')

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