data post on server using sim868 with at commands

I am using sim868 module interface with msp432p401r controller through serial communication. I want to post the data on server.But code is not posting the data.When i send"AT+HTTPREAD"command to sim868 from msp432 i got response{}( blank bracket). I am sending " AT+HTTPDATA=192, 10000" command to sim868 i got response " DOWNLOAD" and after 10000 ms i got ok response also.the data will post within 10000 ms.

Below is my code:-

       UART initialize();

      uart_puts((char *)"AT"); // COMMAND FOR INITIALIZING GSM

       uart_putc(0x0D);//CARRIAGE RETURN

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

      uart_puts((char *)"AT+SAPBR=3,1,\"Contype\",\"GPRS\""); // COMMAND FOR INITIALIZING GSM

       uart_putc(0x0D);//CARRIAGE RETURN

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+SAPBR=3,1,\"APN\",\"internet\"");//SEND A MESSAGE TO PARTICULAR NUMBER

       uart_putc(0x0D);

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+CGATT=1"); // AT commands to initialize gsm modem

       uart_putc(0x0D);

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+SAPBR=1,1"); // AT commands to initialize gsm modem

       uart_putc(0x0D);

       __delay_cycles(100000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+SAPBR=2,1"); // AT commands to initialize gsm modem

       uart_putc(0x0D);

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+HTTPINIT"); // AT commands to initialize gsm modem

       uart_putc(0x0D);

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+HTTPPARA=\"CID\",1"); // AT commands to initialize gsm modem

       uart_putc(0x0D);

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+HTTPPARA=\"URL\",http://resonics.xyz:8995/submit/data"); // AT commands to initialize gsm modem

       uart_putc(0x0D);

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

       uart_puts((char *)"AT+HTTPPARA=\"CONTENT\",\"application/x-www-form-urlencoded\""); // AT commands to initialize gsm modem

       uart_putc(0x0D);

       __delay_cycles(1000000);//DELAY...WAIT FOR OK FROM GSM

       ok_response();

      ((char *)"AT+HTTPDATA=99,100000"); // AT commands to initialize gsm modem

      uart_putc(0x0D);

      __delay_cycles(5000000);

      b=a;

      if( buff[b-3]=='D')

      {

            count=count+1;

            __delay_cycles(5000000);

            uart_puts((char *)"{  \"testID\" : 1,  \"testLevel\" : 1, }"); // AT commands to initialize gsm modem

            uart_putc(0x0D);

            __delay_cycles(5000000);   //DELAY...WAIT FOR OK FROM GSM

      }

     else

        {

            variable=variable+1;

        }

      uart_puts((char *)"AT+HTTPACTION=1");

      uart_putc(0x0D);

      __delay_cycles(5000000);//DELAY...WAIT FOR OK FROM GSM

      ok_response();

     uart_puts((char *)"AT+HTTPREAD");

     uart_putc(0x0D);

     __delay_cycles(5000000);//DELAY...WAIT FOR OK FROM GSM

// UART interrupt service routine

void EUSCIA0_IRQHandler(void)

   {

      if (EUSCI_A0->IFG & EUSCI_A_IFG_RXIFG)

       {

          EUSCI_A0->IFG &=~ EUSCI_A_IFG_RXIFG;// Clear interrupt

          // Echo the received character back

          buff[a]= EUSCI_A0->RXBUF;

          a++;

         }

   }

Please help me ??