updated wifi esp32 code

#include <OneWire.h>
#include <DallasTemperature.h>
#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include "DHT.h"
const char* ssid = "Shoaib";
const char* password = "A01234567890";
#define DHTPIN 32
#define oneWireBus  33
#define DHTTYPE DHT22
#define moistPin  35
#define LDRPin  34
int LDRValue = 0;
int light;
String values;
unsigned long currentMillis;
unsigned long previousMillis;
const int interval = 2500;
DHT dht(DHTPIN, DHTTYPE);
OneWire oneWire(oneWireBus);
DallasTemperature sensors(&oneWire);

void setup() {
  // Start the Serial Monitor
  Serial.begin(115200);
  sensors.begin();  //starts ds18b20
  dht.begin();   //give 2 second delay to all sensors
}


void loop() {
  //get values and send to website only once and then go deep sleep
  currentMillis = millis();
  if (currentMillis - previousMillis > interval) {
    getSensorValues();
    //readBattery();   not configured yet
    delay(1);
    connectWifi();
    delay(100);
    postValues();
    delay(100);
    disconnectWifi();
    delay(100);
    previousMillis = currentMillis;
  }
}

String readBattery() {
  uint8_t percentage = 100;
  float voltage = analogRead(35) / 4096.0 * 7.23;      // LOLIN D32 (no voltage divider need already fitted to board.or NODEMCU ESP32 with 100K+100K voltage divider
  //float voltage = analogRead(39) / 4096.0 * 7.23;    // NODEMCU ESP32 with 100K+100K voltage divider added
  //float voltage = analogRead(A0) / 4096.0 * 4.24;    // Wemos / Lolin D1 Mini 100K series resistor added
  //float voltage = analogRead(A0) / 4096.0 * 5.00;    // Ardunio UNO, no voltage divider required
  Serial.println("Voltage = " + String(voltage));
  percentage = 2808.3808 * pow(voltage, 4) - 43560.9157 * pow(voltage, 3) + 252848.5888 * pow(voltage, 2) - 650767.4615 * voltage + 626532.5703;
  if (voltage > 4.19) percentage = 100;
  else if (voltage <= 3.50) percentage = 0;
  return String(percentage) + "%";
}

void getSensorValues() {
  sensors.requestTemperatures();
  float soilTemp = sensors.getTempCByIndex(0);
  float h = dht.readHumidity();
  values += "soilTemp=" + String(h);
  float t = dht.readTemperature();
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!")); //print to server
    return;
  }
  LDRValue = analogRead(LDRPin); // read the value from the LDR
  light = map(ldrValue, 0, 4095, 0, 100); //map light value as percentage
  moistVal = analogRead(moistPin);
  moisture = map(moistVal, 0, 4095, 100, 0);
}


void postValues() {
  HTTPClient http;
  http.begin("https://finalyearprojectnuml.000webhostapp.com/fyp.php");
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  int httpResponseCode = http.POST(String(values));
  if (httpResponseCode > 0) {
    String response = http.getString();
    Serial.println(httpResponseCode);
    Serial.println(response);
  }
  else {
    Serial.print("Error on sending post");
    Serial.println(httpResponseCode);
  }
  http.end();
}


void connectWifi() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP Address");
  Serial.println(WiFi.localIP());
}


void disconnectWifi(){
  WiFi.disconnect();
  while(WiFi.status() == WL_CONNECTED){
    delay(500);
    Serial.println("Wifi failed to disconnect");
  }
  else
  Serial.println("Wifi disconnected succesfully");
}