Interfacing TC35i GSM problem

Discussion in 'General Electronics Chat' started by Sharagim, Feb 10, 2011.

  1. Sharagim

    Thread Starter New Member

    Feb 10, 2011
    I am interfacing a TC35i GSM module.
    I have a problem which is :
    When there isn't SIM I can connect to serial port and send and receive AT command.
    But when I insert SIM card it is going off after a few seconds. during that shot period of time I can send AT command and it show SIM ID too, There isn't any output to serial on shutdown.
    I would appreciate if you can help me.