Hi, Read the following three

[nikhiljain]

Hi,

 

Read the following three article in order:

 

http://www.engineersgarage.com/microcontroller/8051projects/gsm-interface-8051-microcontroller-circuit-code

http://www.engineersgarage.com/microcontroller/8051projects/interface-gsm-module-8051-microcontroller-circuit-code

http://www.engineersgarage.com/microcontroller/8051projects/interfacing-gsm-8051-microcontroller-circuit-code.

 

To me it appears that all you are doing is a logical error in understanding the working of GSM modem.