Controller not able to collect response from GSM Modem

Hello all, I am trying to send Command from 89S52 Controller to SIM900 GSM Modem when i am sending command as "AT" in response my Receive buffer is able to receive all bytes and code is working...
Controller not able to collect response from GSM Modem

Hello all, I am trying to send Command from 89S52 Controller to SIM900 GSM Modem when i am sending command as "AT" in response my Receive buffer is able to receive all bytes and code is working...
aprogram to read an SMS from phone modem/GSM modem

hello friends i am working on my final year project which is controlling stepper motor using SMS,8051 is interfaced to motor using ULN 2003 and to the modem using MAX232,how can i make the micro controller...
aprogram to read an SMS from phone modem/GSM modem

hello friends i am working on my final year project which is controlling stepper motor using SMS,8051 is interfaced to motor using ULN 2003 and to the modem using MAX232,how can i make the micro controller...
89S52 not able to receive complete AT Response from SIM900 GSM MOdem

Hello I have connected SIM 900 (GSM Modem) with 89S52 Controller, via RS232 Communication. If I send AT from controller to Modem , it is replying with AT OK but my controller is just able to receive...