#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>

bool buttonProcess = true;
String temp;

// Your WiFi credentials.
// Set password to "" for open networks.

const char* ssid = "Wokwi-GUEST";
const char* password = "";

ESP8266WebServer server(80);

void handleRoot() {
  server.send(200, "text/plain", "hello from esp8266!");
}


void handleNotFound() {
  String message = "File Not Found\n\n";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += (server.method() == HTTP_GET) ? "GET" : "POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";

  for (uint8_t i = 0; i < server.args(); i++) {
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  }

  server.send(404, "text/plain", message);
}


void setup()
{

  // Debug console
  Serial.begin(9600);
  WiFi.begin(ssid, password);
  Serial.println("");


  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  server.on("/", handleRoot); // http://localIPAddress/

  server.on("/esp-notify", []() // http://localIPAddress/esp-notify
  {
    //tượng trưng tình trạng dây kéo
    if (buttonProcess == true)
      temp = "true";            //thu vào
    else temp = "false";        //kéo ra
    server.send(200, "text/plain", temp);
  });

   server.onNotFound(handleNotFound);

  server.begin();

  Serial.println("HTTP server started");
}

void loop()
{
  server.handleClient();
}