The complete circuit diagram that shows how to interface and control a solenoid lock with an Arduino through a MOSFET is shown below. As shown in the circuit diagram, the connections are rather, ...

Connect the HC-05 ultrasonic sensor to the ESP32 microcontroller according to the wiring diagram. Ensure the ESP32 is connected to a Wi-Fi network. Running the Code: Upload the Arduino code to the ...

Compact version - A very low component count version that uses only two resistors and two diodes with the Arduino Nano and a HC-05 bluetooth module. A buzzer is optional. ... Kerpz's wiring diagram ...