Arduino UNO ESP8266-12E Wifi Module

[imranahmed]

Please let me know I want to send data to my database, data is sending but when I initializes ESP in setup() but when I initialize in loop() or other function it is not working why?
Working code is attached. I want to initial ESP reset,cwmode and cwjap in other method not in setup() because if I want to change SSID and PASSWORD so I would easily change it without doing reset Arduino.

#include <SoftwareSerial.h>
#define RX A2
#define TX A3
#define DEBUG true
String AP = "********************";
String PASS = "***************";
String sendData;
int sendVal;
String ROW1 = "", ROW2 = "";
String fuelDispenserId = "123" , vehicleId = "567";
SoftwareSerial espSerial(RX, TX);

int buttonState = 0;

void setup() {

  Serial.begin(115200);
  espSerial.begin(115200);
  pinMode(8, INPUT_PULLUP);
  espData("AT+RST", 1000, DEBUG);                      //Reset the ESP8266 module
  espData("AT+CWMODE=1", 1000, DEBUG);                 //Set the ESP mode as station mode
  espData("AT+CWJAP=\"" + AP + "\",\"" + PASS + "\"", 1000, DEBUG); //Connect to WiFi network
  delay(2000);
}


void loop() {

  sendData = "GET http://192.168.3.109/fuelapi.php?ROW1=786&ROW2=786";
  "&ROW1=" + ROW1 +
  "&ROW2=" + ROW2;

  espData("AT+CIPMUX=1", 1000, DEBUG);       //Allow multiple connections
  ////// espData("AT+CIPSTART=0,\"TCP\",\""+ myHOST +"\","+ myPORT, 1000, DEBUG);/////
  espData("AT+CIPSTART=0,\"TCP\",\"192.168.3.109\",80", 1000, DEBUG);
  espData("AT+CIPSEND=0," + String(sendData.length() + 4), 1000, DEBUG);
  espSerial.find(">");
  espSerial.println(sendData);
  Serial.print("Value to be sent: ");
  Serial.println(sendData);
  espData("AT+CIPCLOSE=0", 1000, DEBUG);
  delay(2000);
}

String espData(String command, const int timeout, boolean debug)
{
  Serial.print("AT Command ==> ");
  Serial.print(command);
  Serial.println("     ");

  String response = "";
  espSerial.println(command);
  long int time = millis();
  while ( (time + timeout) > millis())
  {
    while (espSerial.available())
    {
      char c = espSerial.read();
      response += c;
    }
  }
  if (debug)
  {
    Serial.print(response);
  }
  return response;
}