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  1. K

    SIM900 : problem with some AT commands

    Hello !! My problem was solved : I have changed the USART terminal and it worked !!!! Try with "putty" try other commands...and see what happens try to change the SIM card... use another operator !! Best Regards from TUNISIA
  2. K

    specific call with SIM900 !!

    Hi !! yes i did and yes it works..thank you !!
  3. K

    specific call with SIM900 !!

    hi everyone !! i work on my project with SIM900 to give a specific call : so i want to make a call, wait until i get a couple ring tones (or couple seconds) and then hang up the call (before the GSM receiver picks up the call) the problem is that i don't know when the GSM receiver start ringing...
  4. K

    SIM900 : problem with some AT commands

    PS : i also don't get "RDY" on the Hyper Terminal at the start but still can fix the baudrate or get the "OK" response when i send "AT" to the SIM900 !!!! anyone who knows what does it mean ??
  5. K

    SIM900 : problem with some AT commands

    Hello every one !! I use the GSM module SIM900 for the first time. for more than a week i'm trying to send some AT Commands through the Hyper Terminal : Some works and some others just don't !!! i have the SimCard and the antenna for the SIM900 : the NETLIGHT led is blinking as to show that the...

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