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???
03/27/10 20:20
Read: 2533 times


 
#174561 - GSM Module Testing
Dear Seniors,

I am trying to use my GSM module that is on a evaluation board to communicate with AT89C52. I have used the board with HyperTerminal and they are working fine with AT commands. I Have configured the HyperTerminal in Hardware, Software and none Handshaking and it is working in all of them, so i guess the module dose not need handshaking. Now when i checked the continuity of the cable that i am using, i found that pins on one end are connected to the same pin number to the other end, i.e 1 to 1 , 2 to 2 , 3 to 3 and so on till 9 to 9.

Now i tried to use my own cable in which i had 3 wires i.e. 2 to 2 , 3 to 3 and 5 to 5. But when i started hyperterminal, i was no longer able to send AT commands. I addition HyperTerminal stopped responding after a few seconds.

I am i a fix here. If there is no handshaking then how come the 3 wire concept is not working. Do you think that i need to connect the other wires as well ??

List of 33 messages in thread
TopicAuthorDate
GSM Module Testing      Akhil Bose      03/27/10 20:20      
   9-wire VS 3-wire        Michael Karas      03/27/10 22:18      
   Don't guess!      Andy Neil      03/28/10 00:11      
   I will      Akhil Bose      03/28/10 00:59      
      missed the point      Andy Neil      03/28/10 01:57      
      probably the commonest beginner's mistake with AT commands      Andy Neil      03/28/10 02:02      
         ohhhkie      Akhil Bose      03/28/10 02:33      
   it is working, BUT !      Akhil Bose      03/29/10 08:23      
      Look at string manipulation on other targets - almost same      Per Westermark      03/29/10 08:31      
         which other targets,      Akhil Bose      03/29/10 08:54      
            RE: printf      Andy Neil      03/29/10 09:00      
               sorry      Akhil Bose      03/29/10 09:12      
                  Do you need generic formatting?      Per Westermark      03/29/10 09:19      
                     HANG      Akhil Bose      03/29/10 09:22      
                        RTFM      Andy Neil      04/09/10 02:55      
                     puts, itoa        Maarten Brock      04/08/10 05:53      
                        itoa() isn't generally available      Per Westermark      04/08/10 06:32      
                           None of which      Andy Neil      04/09/10 03:03      
                     If you do need generic formatting...      Andy Neil      04/08/10 07:02      
                  Any 'C' textbook...      Andy Neil      03/29/10 09:22      
   how to read a reply ??      Akhil Bose      03/30/10 04:02      
      CRLF - and V.250      Andy Neil      03/30/10 05:36      
      carriage return and line feed      Per Westermark      03/30/10 05:39      
      CR n LF      Akhil Bose      03/30/10 08:17      
         A State Machine...      Andy Neil      03/30/10 09:09      
            Dear Andy      Akhil Bose      03/31/10 06:52      
               google academy      Per Westermark      03/31/10 07:03      
               Oh, come on!      Andy Neil      03/31/10 07:06      
                  State Machines are easy...      Andy Neil      04/01/10 00:29      
                     IAR Article on State MachineDesign      Andy Neil      04/09/10 03:17      
               Thanks      Akhil Bose      03/31/10 07:12      
                  Another keyword you might try...      Andy Neil      03/31/10 07:43      
   It is working !!      Akhil Bose      04/11/10 08:39      

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