Untitled

#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <NTPClient.h>
#include <ESP8266WebServer.h>

#define RELAY_PIN D1
#define LDR_PIN   A0

// ===== Wi-Fi Credentials =====
const char* ssid = "TestESP";
const char* password = "12345678";

// ===== Settings =====
int threshold = 600;      // Default LDR threshold
int startHour = 18, startMinute = 0, startSecond = 0;
int endHour   = 6,  endMinute = 0, endSecond = 0;

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", 19800, 60000); // +5:30 offset (India)
ESP8266WebServer server(80);

bool manualOverride = false;
bool manualState = false;

void handleRoot() {
  int ldrValue = analogRead(LDR_PIN);
  timeClient.update();
  int hourNow = timeClient.getHours();

  bool dark = (ldrValue < threshold);
  bool night = (hourNow >= startHour || hourNow < endHour);
  bool autoState = (dark || night);
  bool lightOn = manualOverride ? manualState : autoState;

  String html = R"rawliteral(
  <!DOCTYPE html><html><head>
  <meta name='viewport' content='width=device-width, initial-scale=1'>
  <title>Smart Auto Light</title>
  <style>
  body{margin:0;font-family:Poppins,Arial;background:#111;color:#fff;text-align:center;}
  .container{max-width:400px;margin:auto;padding:20px;}
  input,button{width:90%;padding:10px;margin:8px 0;border:none;border-radius:10px;font-size:16px;}
  button{cursor:pointer;}
  .on{background:#4caf50;color:white;}
  .off{background:#f44336;color:white;}
  .switch{background:#2196f3;color:white;}
  .card{background:#222;border-radius:15px;padding:15px;margin:10px 0;}
  </style></head><body>
  <div class='container'>
  <h2>🌙 Smart Auto Light</h2>
  <div class='card'>
    <b>LDR Value:</b> <span id='ldr'>)rawliteral" + String(ldrValue) + R"rawliteral(</span><br>
    <b>Time:</b> <span id='time'>)rawliteral" + String(hourNow) + R"rawliteral(:00</span><br>
    <b>Mode:</b> <span id='mode'>)rawliteral" + String(manualOverride ? "Manual" : "Auto") + R"rawliteral(</span><br>
    <b>Light:</b> <span id='light'>)rawliteral" + String(lightOn ? "ON" : "OFF") + R"rawliteral(</span>
  </div>

  <div class='card'>
    <h3>Manual Control</h3>
    <button class='on' onclick="send('on')">ON</button>
    <button class='off' onclick="send('off')">OFF</button>
    <button class='switch' onclick="send('mode')">Switch to )rawliteral" + String(manualOverride ? "Auto" : "Manual") + R"rawliteral(</button>
  </div>

  <div class='card'>
    <h3>Settings</h3>
    <form onsubmit="updateSettings(event)">
      Threshold: <input type='number' id='th' value=')rawliteral" + String(threshold) + R"rawliteral('><br>
      Start Time (HH:MM:SS): <input type='text' id='st' value=')rawliteral" + String(startHour) + ":" + String(startMinute) + ":" + String(startSecond) + R"rawliteral('><br>
      End Time (HH:MM:SS): <input type='text' id='et' value=')rawliteral" + String(endHour) + ":" + String(endMinute) + ":" + String(endSecond) + R"rawliteral('><br>
      <button class='switch' type='submit'>Update</button>
    </form>
  </div>

  </div>
  <script>
  function send(cmd){
    fetch('/'+cmd).then(()=>location.reload());
  }
  function updateSettings(e){
    e.preventDefault();
    const th = document.getElementById('th').value;
    const st = document.getElementById('st').value;
    const et = document.getElementById('et').value;
    fetch(`/set?th=${th}&st=${st}&et=${et}`).then(()=>location.reload());
  }
  </script>
  </body></html>
  )rawliteral";

  server.send(200, "text/html", html);
}

void handleCommand() {
  String cmd = server.uri();
  if (cmd == "/on") { manualOverride = true; manualState = true; }
  else if (cmd == "/off") { manualOverride = true; manualState = false; }
  else if (cmd == "/mode") { manualOverride = !manualOverride; }
  server.sendHeader("Location", "/");
  server.send(303);
}

void handleSet() {
  if (server.hasArg("th")) threshold = server.arg("th").toInt();
  if (server.hasArg("st")) {
    sscanf(server.arg("st").c_str(), "%d:%d:%d", &startHour, &startMinute, &startSecond);
  }
  if (server.hasArg("et")) {
    sscanf(server.arg("et").c_str(), "%d:%d:%d", &endHour, &endMinute, &endSecond);
  }
  server.sendHeader("Location", "/");
  server.send(303);
}

void setup() {
  Serial.begin(115200);
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);

  Serial.println("\nConnecting to Wi-Fi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWi-Fi connected: " + WiFi.localIP().toString());

  timeClient.begin();
  timeClient.update();

  server.on("/", handleRoot);
  server.on("/on", handleCommand);
  server.on("/off", handleCommand);
  server.on("/mode", handleCommand);
  server.on("/set", handleSet);
  server.begin();
  Serial.println("Web server started!");
}

void loop() {
  server.handleClient();
  timeClient.update();

  int ldrValue = analogRead(LDR_PIN);
  int hourNow = timeClient.getHours();
  bool dark = (ldrValue < threshold);
  bool night = (hourNow >= startHour || hourNow < endHour);
  bool autoState = (dark || night);
  bool lightOn = manualOverride ? manualState : autoState;

  digitalWrite(RELAY_PIN, lightOn ? LOW : HIGH);
  delay(1000);
}

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