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03/28/10 02:20
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 		 #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            01/01/70 00:00      
   9-wire VS 3-wire            01/01/70 00:00      
   Don't guess!            01/01/70 00:00      
   I will            01/01/70 00:00      
      missed the point            01/01/70 00:00      
      probably the commonest beginner's mistake with AT commands            01/01/70 00:00      
         ohhhkie            01/01/70 00:00      
   it is working, BUT !            01/01/70 00:00      
      Look at string manipulation on other targets - almost same            01/01/70 00:00      
         which other targets,            01/01/70 00:00      
            RE: printf            01/01/70 00:00      
               sorry            01/01/70 00:00      
                  Do you need generic formatting?            01/01/70 00:00      
                     HANG            01/01/70 00:00      
                        RTFM            01/01/70 00:00      
                     puts, itoa            01/01/70 00:00      
                        itoa() isn't generally available            01/01/70 00:00      
                           None of which            01/01/70 00:00      
                     If you do need generic formatting...            01/01/70 00:00      
                  Any 'C' textbook...            01/01/70 00:00      
   how to read a reply ??            01/01/70 00:00      
      CRLF - and V.250            01/01/70 00:00      
      carriage return and line feed            01/01/70 00:00      
      CR n LF            01/01/70 00:00      
         A State Machine...            01/01/70 00:00      
            Dear Andy            01/01/70 00:00      
               google academy            01/01/70 00:00      
               Oh, come on!            01/01/70 00:00      
                  State Machines are easy...            01/01/70 00:00      
                     IAR Article on State MachineDesign            01/01/70 00:00      
               Thanks            01/01/70 00:00      
                  Another keyword you might try...            01/01/70 00:00      
   It is working !!            01/01/70 00:00      

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