Temperature to website using the Arduino Mega

#include <Wire.h>
#include <ESP8266_Lib.h>
#include "WiFiEsp.h"
#include "SHTSensor.h"
SHTSensor sht;
WiFiEspClient client;


char ssid[] = "WiFi";               // SSID
char pass[] = "Pass";               // wifipassord


// your network password
int status = WL_IDLE_STATUS;
char server[] = "website";
#define EspSerial Serial1
#define ESP8266_BAUD 9600

ESP8266 wifi(&EspSerial);
long sendetid;
long rssi;
double rssidouble;
double temp;
double fuktighet;

void setup()
{

  Wire.begin();
  Serial.begin(9600);
  // initialize serial for ESP module
  Serial1.begin(9600);
  // initialize ESP module
  WiFi.init(&Serial1);
  delay(1600);

  // check for the presence of the shield
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue
    while (true);
  }

  // attempt to connect to WiFi network

  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to WPA SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network
    status = WiFi.begin(ssid, pass);
  }

  Serial.println("You're connected to the network");



  if (sht.init()) {
    Serial.print("init(): success\n");
  } else {
    Serial.print("init(): failed\n");
  }



  sht.setAccuracy(SHTSensor::SHT_ACCURACY_MEDIUM);
  printWifiStatus();
  sendetid = millis();
  sjekker();
  sender();
}

void loop()
{



  if ((millis() - sendetid) > 10350L) {
    sjekker();
    sender();
    rssi = WiFi.RSSI();
    rssidouble = (0 - rssi) / 10.0;
  }

}

// this method makes a HTTP connection to the server
void sender()
{
  sendetid = millis();
  Serial.println("Skal sende..");

  client.stop();
  delay(400);


  if (client.connect(server, 80)) {





    // if there's a successful connection
    Serial.println("Connecting...");

    // send the HTTP PUT request
    client.print(F("GET /Sensors/write_data.php"));
    client.print("?temperatur=");
    client.print(temp);
    client.print("&fuktighet=");
    client.print(fuktighet);
    client.print("&rssi=");
    client.print(rssi);
    client.println(F(" HTTP/1.0"));
    client.println(F("Host: website"));
    client.println("Connection: close");
    client.println();
    client.stop();
    // note the time that the connection was made

  }
  else {
    // if you couldn't make a connection
    Serial.println("Connection failed");
  }
  Serial.println("Har sendt!");
}






void printWifiStatus()
{
  // print the SSID of the network you're attached to
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  // print the received signal strength
  rssi = WiFi.RSSI();
  rssidouble = (0 - rssi) / 10.0;
  Serial.print("Signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}


void sjekker()
{

  if (sht.readSample()) {

    temp = sht.getTemperature();  // get temp from SHT
    fuktighet = sht.getHumidity(); // get fukt from SHT

  } else {
    Serial.print("Error in readSample()\n");
  }
  delay(500);


  Serial.print("Temperatur = ");
  Serial.print(temp);
  Serial.print(", Fuktighet = ");
  Serial.print(fuktighet);
  Serial.print(", RSSI = ");
  Serial.println(rssi);
}