Tutorial: Bluetooth 240V/9W Light Bulb System w/ESP32, 5V Relay Modules, Arduino IDE & Android Smartphone

This video tutorial guides viewers through creating a Bluetooth-controlled light bulb system using an Android phone and an ESP32 microcontroller. It covers the necessary components, wiring setup, safety precautions, and programming the ESP32 to control the light bulb via a smartphone app. The tutorial emphasizes the importance of safety when dealing with high voltage and provides step-by-step instructions for assembling and testing the system.

What is the primary function of the Arduino Bluetooth controller app in this project?

• To connect the light bulb to the internet

• To provide power to the light bulb

• To measure the brightness of the light bulb

• To control the light bulb using Bluetooth commands

Which component is used to adjust the voltage on the breadboard?

• Arduino Bluetooth controller app

• ESP 32 microcontroller

• LED light bulb

• Breadboard power supply module

What is the recommended voltage setting for the breadboard power supply module?

• 9 Volts

• 1.5 Volts

• 3.3 Volts

• 5 Volts

What color wire is used for the live connection in the light bulb system?

• Green

• Blue

• Red

• Black

What safety precaution is emphasized when working with the light bulb system?

• Using a surge protector

• Using a multimeter

• Wearing gloves

• Disconnecting power before wiring

What is the purpose of the relay module in the light bulb system?

• To charge the battery

• To act as a switch for the light bulb

• To measure the voltage

• To provide Wi-Fi connectivity

Which pin is used for the relay in the ESP 32 code?

• Pin 13

• Pin 12

• Pin 11

• Pin 10

What should you do if the code is not uploading to the ESP 32?

• Change the USB cable

• Hold the reset button on the ESP 32

• Restart the computer

• Reinstall the Arduino IDE

How can the light bulb be controlled using the smartphone app?

• By using GPS location

• By sending voice commands

• By using the terminal to send 0 and 1

• By shaking the phone

What is the advantage of using a battery or adapter for the system?

• It increases the brightness of the light bulb

• It allows the system to operate without a computer

• It enables internet connectivity

• It reduces the power consumption