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Problem in sending Data over a TCp Server using SIM300 and Micro-Controller???

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Hello!!! i am trying to send data over a TCP Server using SIM300 Module

I had successfully established connection with my TCP Server, but the problem is that, the connection closes after sometime.
I am getting PDP DEACT after some time.

AT+CIPSTART="TCP","IP ADDDRESS","5000"

OK

CONNECT OK


while(1)
{

AT+CIPSEND
>Hello!! (CTRL+Z)

SEND OK

Delay_of_5_Seconds

}


I had to implement this, but after some time my modem gets disconnected.

And what is the proper procedure to restart the connection again.

I do like this

AT+CIPSHUT
SHUT OK

Then execute the command again
 

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