#include <WiFi.h>
#include <WiFiUdp.h>

const char* ssid = "Khu Noi Tru 2.4Ghz";
const char* password = "";
const IPAddress receiverIP(10, 0, 41, 130); 

const int BUTTON_PIN = 2; 
const int LED_PIN = 4;   

WiFiUDP udp;

void setup() {
  Serial.begin(115200);
  pinMode(BUTTON_PIN, INPUT_PULLUP); 
  pinMode(LED_PIN, OUTPUT);          
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  
  Serial.println("Connected to WiFi");
}

void loop() {
  if (digitalRead(BUTTON_PIN) == HIGH) {
    sendData("Button pressed from ESP32-1");
    digitalWrite(LED_PIN, HIGH);
    delay(1000);
    digitalWrite(LED_PIN, LOW);
    delay(1000);
  }
}

void sendData(const char* data) {
  udp.beginPacket(receiverIP, 8888);
  udp.write(reinterpret_cast<const byte*>(data), strlen(data));
  udp.endPacket();
}