Need help to send Meter & sensor data to server by HTTP GET Method

Hi, i am trying to send Meter_data and sensor data to Server at HTTP Level through GET Method, how we send dynamic data continuously ? every time voltage will be change here i am storing data in the buffer but how i need to send server please suggest me .my server understand only GET Method.

        char Command_ATE0[]       =  "ATE0\r\n";
        char Command_AT[]         =  "AT\r\n";
        char Command_SAPBR[]      =  "AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"\r\n";                        
      	char Command2_SAPBR[]     =  "AT+SAPBR=3,1,\"APN\",\"airtelgprs.com\"\r\n";
        char Command3_SAPBR[]     =  "AT+SAPBR=1,1\r\n";
        char Command4_SAPBR[]     =  "AT+SAPBR=2,1\r\n";
        char Command_HTTPINIT[]   =  "AT+HTTPINIT\r\n";
        char Command_HTTPPARA[]   =  "AT+HTTPPARA=\"CID\",1\r\n";
       
 //	char Command1_HTTPPARA[]  =  "AT+HTTPPARA=\"URL\",\"amr.sysamigo.com/base/amr/?device_string=Device_ID=865067026174667,Lat=0.000000,Long=0.000000,AMR_S.No=17081343,VOL=232,Power=0002.5\"\r\n";


 //	char Command1_HTTPPARA[]  =  "AT+HTTPPARA=\"URL\",\"server_buf\"\r\n";


	char Command1_HTTPPARA[]  = "AT+HTTPPARA=\"str1\"\r\n";
        char Command_HTTPACTION[] = "AT+HTTPACTION=0\r\n";
        char AMR_SNo[50];
        char VOL[40];
        
        char Response_ATE0[]   		 =   "OK";
        char Response_AT[]      	 =   "OK";
	char Response_SAPBR[]   	 =   "OK";
        char Response_SAPBR2[]           =   "OK";
	char Response_SAPBR3[]   	 =   "OK";
        char Response_SAPBR4[]   	 =   "";
	char Response_HTTPINIT[] 	 =   "OK";
        char Response_HTTPPARA[] 	 =   "OK";        //     "STATE: IP INITIAL";
        char AT_Error[5]                 =   "ERROR";
        char Response1_HTTPPARA[]        =   "OK";
        char Response_HTTPACTION[]       =   "OK";
        char Response_HTTPACTION1[]      =   "+HTTPACTION:0,200,0";

	int fd;
        

      //   char server_buf[512];

         char DEVICE_ID[]= "865067026174667";
      // char Header[]   = "GET /base/amr/?device_string=";
         char Header[]   = "amr.sysamigo.com/base/amr/?device_string=";
         char Lat[]      = "0.000000";    
         char Long[]     = "1.000000";
      // char Data_buf[] = "17081343,VOL=230";
//         char AMR_S.No[];
//         char VOL[];
         char Power[]   = "0012.5";
         unsigned int buf_len[32];
         unsigned int len;
        sprintf(&server_buf[0],"%sDevice_ID=%s,Lat=%s,Long=%s,AMR_S.No=%s,VOL=%s,Power=%s",Header,DEVICE_ID,Lat,Long,AMR_SNo,VOL,Power);

/*==========================================================================================*/
/* main function                                                                            */
/*==========================================================================================*/
char str1[145]= "\"URL\",";
int main(void)
{

                 gpio_export();
                 gpio_dir_in();
		 openPort(); 

	         int gpio =129;
                 char buf[40]; 
		 int fd1;
        
                /* exporting the gpio pin for METER */  
                fd1 = open("/sys/class/gpio/export", O_WRONLY);
                if(fd1 == -1) {
                printf("can't open gpio129\n"); 
                              }
                sprintf(buf,"%d",gpio);
                write(fd1, buf, strlen(buf));
                close(fd1);
       
		//Set the direction in the GPIO folder 
                sprintf(buf,"/sys/class/gpio/gpio%d/direction", gpio);
                fd1 = open(buf, O_RDWR);
                write(fd1, "out", 3);      // Set out direction
    


      


 send_flag=1;

 while(1)
        { 

        gpio_read();
        }

 return 0;

}


/*================================================================================================*/
/*  open the serial port,  sending data to the gprs                                               */
/*================================================================================================*/

void uart_gprs()

    	{
        		int k,i;   /*File Descriptor*/
		        char read_buffer[40];
			int  bytes_written  = 0;  	
			int  nread=0;
			char read_buff[10];
		
		printf("\n +----------------------------------+");
		printf("\n |        Serial Port Write         |");
		printf("\n +----------------------------------+");

        	fd = open("/dev/ttySAC1",O_RDWR | O_NOCTTY | O_NDELAY);	                   
									
        	if(fd == -1)						/* Error Checking */
            	   printf("\n  Error! in Opening /dev/ttySAC1  ");
        	else
            	   printf("\n  /dev/ttySAC1 Opened Successfully ");

	
		/*---------- Setting the Attributes of the serial port using termios structure --------- */
		
		struct termios SerialPortSettings;	/* Create the structure                          */

		tcgetattr(fd, &SerialPortSettings);	/* Get the current attributes of the Serial port */

		cfsetispeed(&SerialPortSettings,B9600); /* Set Read  Speed as 9600                       */
		cfsetospeed(&SerialPortSettings,B9600); /* Set Write Speed as 9600                       */

		SerialPortSettings.c_cflag &= ~PARENB;   /* Disables the Parity Enable bit(PARENB),So No Parity   */
		SerialPortSettings.c_cflag &= ~CSTOPB;   /* CSTOPB = 2 Stop bits,here it is cleared so 1 Stop bit */
		SerialPortSettings.c_cflag &= ~CSIZE;	 /* Clears the mask for setting the data size             */
		SerialPortSettings.c_cflag |=  CS8;      /* Set the data bits = 8                                 */
	
		SerialPortSettings.c_cflag &= ~CRTSCTS;       /* No Hardware flow Control                         */
		SerialPortSettings.c_cflag |=  CREAD | CLOCAL; /* Enable receiver,Ignore Modem Control lines       */ 
		
		
		SerialPortSettings.c_iflag &= ~(IXON | IXOFF | IXANY);          /* Disable XON/XOFF flow control both i/p and o/p */
		SerialPortSettings.c_iflag &= ~(ICANON | ECHO | ECHOE | ISIG);  /* Non Cannonical mode  */                          	
		SerialPortSettings.c_oflag &= ~OPOST;                           /*No Output Processing*/
                                                      
		SerialPortSettings.c_cc[VMIN]  = 0;
		SerialPortSettings.c_cc[VTIME] = 10;


		if((tcsetattr(fd,TCSANOW,&SerialPortSettings)) != 0) /* Set the attributes to the termios structure*/
		    printf("\n  ERROR ! REG?\r\n",10);
		else
                    printf("\n  BaudRate = 9600 \n  StopBits = 1 \n  Parity   = none\n");
			                                                                       
	        /*------------------------------- Write data to serial port -----------------------------*/
   		 
 
       while(1)
          {
        	     sleep(5);
 	             printf("continue scheduler.....!!\n");                         
             
            	if(gprs_send_flag)
            	  {
                    gprs_send_flag=0;

            	switch(http_cmd)
                  {

                case 1:   
	                printf("\n ATE0 status :\n");    
 			tcflush(fd, TCIFLUSH);               //Discards old data in the rx buffer
			write(fd,Command_ATE0,strlen(Command_ATE0));          
			status= Get_responce(fd,Response_ATE0,strlen(Response_ATE0));
              		sleep(2);
               		break;

                case 2:
                        printf("\n AT init status:\n");    
        	        tcflush(fd, TCIFLUSH);   
			write(fd,Command_AT,strlen(Command_AT));                
	   		status=Get_responce(fd,Response_AT,strlen(Response_AT));
              		sleep(2);         
               	        break;

                case 3:                                 
                        printf("\n Command_SAPBR Connetion type staus:\n");    
 			tcflush(fd, TCIFLUSH);
			write(fd,Command_SAPBR,strlen(Command_SAPBR));                                 
			status= Get_responce(fd,Response_SAPBR,strlen(Response_SAPBR));
              		sleep(2);
               		break;

                case 4:
	                printf("\n Command2_AT+SAPBR APN :\n");    
        	        tcflush(fd, TCIFLUSH);
                	write(fd, Command2_SAPBR,strlen(Command2_SAPBR));     
			status= Get_responce(fd,Response_SAPBR2,strlen(Response_SAPBR2));
              		sleep(2);
               		break;
                 
                case 5:             
	                printf("\n Command3_AT+SAPBR Enable the Gprs :\n");    
        	        tcflush(fd, TCIFLUSH);
			write(fd,Command3_SAPBR,strlen(Command3_SAPBR));
                        sleep(2);         
			status= Get_responce(fd,Response_SAPBR3,strlen(Response_SAPBR3));
        	      	sleep(2);
               		break;
                
                case 6:
	                printf("\n Command4_AT+SAPBR check for connection :\n");    
        	        tcflush(fd, TCIFLUSH);
			write(fd,Command4_SAPBR,strlen(Command4_SAPBR));    
			status= Get_responce(fd,Response_SAPBR4,strlen(Response_SAPBR4));
              		sleep(2);
                	break;
                
                case 7:
	                printf("\n Command_AT+HTTPINIT: \n");    
    			tcflush(fd, TCIFLUSH);  
			write(fd,Command_HTTPINIT,strlen(Command_HTTPINIT));      
			status= Get_responce(fd,Response_HTTPINIT,strlen(Response_HTTPINIT));
              		sleep(2);
                 	break;

		case 8:
	                printf("\n Command_AT+HTTPPARA  setting up the HTTP bearer profile identifier:\n");    
       		        tcflush(fd, TCIFLUSH);  
			write(fd,Command_HTTPPARA,strlen(Command_HTTPPARA));
			status= Get_responce(fd,Response_HTTPPARA,strlen(Response_HTTPPARA));
              		sleep(2);
                        break;

                case 9:

		        printf("\n Command1_AT+HTTPPARA:\n"); // Set the url to the address of the webpage you want to access
                        tcflush(fd, TCIFLUSH);
                        write(fd,Command1_HTTPPARA,strlen(Command1_HTTPPARA));
                        sleep(1);
                        status= Get_responce(fd, Response1_HTTPPARA,strlen(Response1_HTTPPARA));
                        sleep(2);
                        break;

                 case 10:
                        printf("\n Command_AT+HTTPACTION start HTTP Get Session:\n");  // Start the HTTP GET session, by giving this command
                        tcflush(fd, TCIFLUSH);
                        write(fd,Command_HTTPACTION,strlen(Command_HTTPACTION));
                  
                        sleep(2);
            

                        printf("waiting for response\n");
                        sleep(20);
                        status=Get_responce(fd,Response_HTTPACTION1,strlen(Response_HTTPACTION1));
                        sleep(2);                       
                        break;