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How to interface GSM module with 89s52

mayank kaushik

I am able to connect my sim900 gsm module with hyper terminal but I am not able to connect it with 89s52. Please help me to connect it.

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    Besides missing lot of hardware information already mentioned - like clock frequencies (to verify if you really got 9600 baud) or electrical levels used by that GSM modem - you do other interesting stuff.

    You think it is a good idea to send multiple commands to the modem at maximum transfer speed?

    Did you test the same with the hyperterminal, i.e. never waiting for any response before starting with the following command? You have seen in a datasheet somewhere that the modem do support this? Really?

    Don't you believe there was a reason why the AT commands do generate responses?

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  • 0

    Besides missing lot of hardware information already mentioned - like clock frequencies (to verify if you really got 9600 baud) or electrical levels used by that GSM modem - you do other interesting stuff.

    You think it is a good idea to send multiple commands to the modem at maximum transfer speed?

    Did you test the same with the hyperterminal, i.e. never waiting for any response before starting with the following command? You have seen in a datasheet somewhere that the modem do support this? Really?

    Don't you believe there was a reason why the AT commands do generate responses?

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