WiFi Smart Door Lock esp8266/Nodemcu

WiFi Smart Door Lock 🔐

Description: Uses a servo motor as a lock, controlled via a web page.
Components:

• NodeMCU (ESP8266) or ESP32

• Servo Motor (SG90)

Circuit Diagram

• Servo Signal → D3

• Servo VCC → 5V

• Servo GND → GND

Code

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <Servo.h>

ESP8266WebServer server(80);
Servo myServo;

const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

void handleLock() {
  myServo.write(0);  // Lock position
  server.send(200, "text/html", "<h1>Door Locked</h1>");
}

void handleUnlock() {
  myServo.write(90);  // Unlock position
  server.send(200, "text/html", "<h1>Door Unlocked</h1>");
}

void setup() {
  myServo.attach(D3);
  myServo.write(0);  // Start locked
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
  }
  server.on("/lock", handleLock);
  server.on("/unlock", handleUnlock);
  server.begin();
}

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

✅ Lock & unlock the door via:

• http://your_esp_ip/lock (Locks)

• http://your_esp_ip/unlock (Unlocks)