OTP Based Password Door Lock using Arduino UNO, Keypad, GSM SIM900A & Servo Motor

📌 Description:
In this project, we demonstrate a secure OTP-based password door lock system using Arduino UNO, 4x4 keypad matrix, GSM SIM900A module, and a servo motor.

When a user enters their number via the keypad, an OTP is sent to their mobile using the GSM module.

The OTP must be entered on the keypad to unlock the door with the servo motor.

This enhances home security, office access, and smart lock systems with real-time authentication.

This tutorial covers:
✅ Circuit design & connections#iot
✅ Arduino UNO coding
✅ GSM SIM900A integration for OTP
✅ Servo motor door lock mechanism
✅ Step-by-step explanation for beginners

Perfect for IoT, security systems, and Arduino projects. 🚀

#smartphone #iot #arduino #esp32 #arduinoarduinopro ject #support #viral #coding #diyproject #Arduino #ArduinoUNO #IOT #GSMModule #SIM900A #KeypadMatrix #ServoMotor #OTP #PasswordLock #DoorLockSystem #HomeAutomation #ArduinoProject #Electronics #EmbeddedSystems #TechProjects #arduinoprojectSecuritySystem #engineering

Видео OTP Based Password Door Lock using Arduino UNO, Keypad, GSM SIM900A & Servo Motor канала brightvision tech