Arduino AI-Powered Mystery Lock (Arduino Nano ESP32 + OpenAI + Arduino IoT Cloud)
Overview AI and Arduino are combined to create a quiz-to-unlock smart lock. OpenAI generates a short question and validates the reply; the Arduino Nano ESP32 controls a 12 V solenoid via MOSFET/relay and updates an Arduino IoT Cloud dashboard. Correct answer → brief unlock. Wrong answer → buzzer pattern and reset. Hardware remains minimal; intelligence…