Problem with Updating field in Thingspeak using AT command

Mbed OS
1

I’m try to connect to Thingspeak using Atcommand
I connected successfully to the site but "GET /update?api_key=&field1=143"
not write any thing on the field .I used _parser->write (GET /update?api_key=&field1=143);
to send the data is it write or need to used another command

include "mbed.h"
#include "platform\ATCmdParser.h"
#include "drivers\UARTSerial.h"
#include <string>

#define   ESP8266_DEFAULT_BAUD_RATE   115200

#define ESP32_AT_ECHO_OFF                   "ATE0"
#define ESP32_AT                            "AT"
#define ESP32_AT_VERSION                     "AT+GMR"
#define ESP32_AT_RST                        "AT+RST"
#define ESP32_AT_MODE_STATION               "AT+CWMODE_CUR=1"
#define ESP32_AT_MODE_AP                    "AT+CWMODE_CUR=2"
#define ESP32_AT_MODE_AP_STATION            "AT+CWMODE_CUR=3"
#define ESP32_AT_CPONECT_AP                 "AT+CWJAP=\"WLAN-8RM8KE\",\"75759746464185958228\""
#define ESP32_AT_CREATE_AP                  "AT+CWSAP_CUR=\"21FAPCTDV01\",\"123456789\",1,2"
#define ESP32_AT_LIST_AP                    "AT+CWLAP"
#define ESP32_AT_GET_IP											" AT+CIFSR"
#define ESP32_AT_CONN_MODE_SINGLE           "AT+CIPMUX=0"
#define ESP32_AT_TCP_CONN										"AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",80"
#define ESP32_AT_DATA_LENGTH  							"AT+CIPSEND=51"
#define ESP32_DATA													"GET /update?api_key=681VDNKCSXQDA4M2&field2=143 "
#define ESP32_AT_TCP_CONN_CLOSE             "AT+CIPCLOSE"
#define ESP32_AT_OK_STATUS                  "OK"

UARTSerial *_serial;
ATCmdParser *_parser;
const char *at_cmd[] = {ESP32_AT,
                     ESP32_AT_VERSION, 
											ESP32_AT_MODE_AP_STATION, 
											ESP32_AT_CPONECT_AP,
											ESP32_AT_GET_IP, 
											ESP32_AT_CONN_MODE_SINGLE, 
											ESP32_AT_TCP_CONN,
											ESP32_AT_DATA_LENGTH} ; 

int main()
{
	int command_index = 0;
   // printf("\nATCmdParser with ESP8266 example");
    
    _serial = new UARTSerial( PB_1, PB_0, ESP8266_DEFAULT_BAUD_RATE);
    _parser = new ATCmdParser(_serial);
    _parser->debug_on( 1 );
    _parser->set_delimiter( "\r\n" );
    
   
	  while(command_index < sizeof(at_cmd) / sizeof(at_cmd[0]))
    {
		 if (	(_parser->send(at_cmd[command_index])== TRUE ) && _parser->recv("OK")== TRUE )
			 {
				 printf("AT command send Successfully\n" );
				 command_index++;
		   }
			 else 
			 { 
				 printf("send AT command failed\n" );
				 command_index =0;
				 return -1;
			 }
		}
		_parser->write("GET /update?api_key=********************&field1=143");
		
   _parser->send (ESP32_AT_TCP_CONN_CLOSE);
  //  printf("\nDone\n");
}