Arduino code (17.2.2018)

#include <DHT_U.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
#include <SPI.h>
#include "Timer.h"
#include <Servo.h>

byte MAC[] = { 0xDE, 0x12, 0x44, 0xAF, 0xBE, 0x56 };
IPAddress IP(192, 168, 2, 100);
unsigned int localPort = 5000;

char packetBuffer[UDP_TX_PACKET_MAX_SIZE];
String dataReq;
int packetSize;

EthernetUDP UDP;
Timer t;
Timer t1;

#define DHTPIN 10
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

Servo myservo;

int i = 10;

void setup() {
  Serial.begin(9600);
  Ethernet.begin(MAC, IP);

  delay(1500);
  UDP.begin(localPort);

  for (int i = 2; i < 14; ++i) {
    pinMode(i, OUTPUT);
  }

  Serial.println(Ethernet.localIP());
  t.every(5000, takeTemperatureReading);

  myservo.attach(9);
}

void loop() {

  packetSize = UDP.parsePacket();

  t.update();

  // float temp = dht.readTemperature();
  // Serial.println(temp);
  // delay(1000);
  // Serial.println("GOOD");

  // UDP.beginPacket(UDP.remoteIP(), UDP.remotePort());
  // UDP.print(temp);
  // UDP.endPacket(); //Packet has been sent

  if (packetSize > 0) {

    // Some stuff for recieving data
    UDP.read(packetBuffer, UDP_TX_PACKET_MAX_SIZE); // Reading the data request, saving it in packetBuffer of UDP max size
    String dataReq(packetBuffer); // converting char array to string
    Serial.println(dataReq);
    String type = dataReq.substring(0, 3);
    int pin = dataReq.substring(3, 5).toInt();
    int state = dataReq.substring(5, 6).toInt();
    if (type == "RLY") {
      digitalWrite(pin, state);
    }
    else if (type == "LCK") {
      if (state == 1) {
        Serial.println("LOCKED");
        myservo.write(0);
      }
      else if (state == 0) {
        Serial.println("UNLOCKED");
        myservo.write(150);
      }
    }


  }


  memset(packetBuffer, 0, UDP_TX_PACKET_MAX_SIZE);
}

void takeTemperatureReading() {

  // float temp = dht.readTemperature();

  // String sendData = "TMP=" + String(temp);
  String sendData = "TMP=" + String(i) + ".00";

  Serial.println("Good");
  Serial.println(sendData);

  UDP.beginPacket(UDP.remoteIP(), UDP.remotePort());
  UDP.print(sendData);
  UDP.endPacket(); //Packet has been sent

  i++;
  if(i == 98) i = 10;


}