#include <WiFi.h>
#include <WiFiUdp.h>
#include "DHT.h"
DHT dht(16,DHT22);   // 16 GPIO numbering system



const int udpPort = 5219;  // UDP port to listen on 5219
WiFiUDP udp;

void setup() {
  Serial1.begin(115200);
  Serial1.println("Connecting to WiFi...");
  WiFi.begin("Wokwi-GUEST", "");

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial1.println("Connecting to WiFi...");
  }

  Serial1.println("WiFi connected.");
  Serial1.print("IP Address:");
  Serial1.println(WiFi.localIP());
  Serial1.println("UDP server started");
  udp.begin(udpPort);
}

void loop() {
  char packetBuffer[255];  // Buffer to hold icoming packet

  int packetSize = udp.parsePacket();
  if (packetSize) {
    // receiving incoming UDP packet
    int len = udp.read(packetBuffer, 255);
    if (len > 0) {
      packetBuffer[len] = 0;
    }

    // check if the received packet is a request for humidity data
    if (strcmp(packetBuffer, "GET_H") == 0) {
      // replace the following line with your humidity sesor reading logic
      float humidity = readHumidity();  // function to read humidity data

      //  send humidity data back to the client
      udp.beginPacket(udp.remoteIP(), udp.remotePort());
      udp.printf("Humidity: %.2f%%", humidity);
      udp.endPacket();
    }
      }
      delay(1000);  // add a small delay to avoid excessive response
}

float readHumidity()
{
  // Read data from a DHT sensor
  float humidity = dht.readHumidity();
  return humidity;
}