Expt 1 IoT LAB

What does the digitalWrite function do in Arduino programming?

• Reads the state of a digital pin

• Sets the pin mode as an output

• Writes a HIGH voltage to a digital pin

• Writes a LOW voltage to a digital pin

What is the purpose of the delay function in Arduino programming?

• Pauses the serial communication

• Delays the input from a sensor

• Stops the program execution for a specified time

• Generates a random delay

What is the role of the buttonState variable in the given code?

• It determines the IR sensor value

• It controls the delay time

• It holds the state of the pushbutton

• It stores the LED pin number

What does the digitalRead function do in the given code?

• Sets the pin mode as an input

• Writes a LOW voltage to a digital pin

• Writes a HIGH voltage to a digital pin

• Reads the state of a digital pin

What is the purpose of the Serial.begin function in the given code?

• Starts the serial communication

• Turns on the LED

• Initializes the IR sensor pin

• Begins the loop function

What is the purpose of the tone function in the provided code?

• Produces a random tone

• Plays a tone on the buzzer

• Sets the pin mode as an output

• Controls the LED brightness

What is the role of the buzzerPin variable in the given code?

• It defines the pin to which the buzzer is connected

• It determines the IR sensor value

• It holds the state of the pushbutton

• It stores the LED pin number

What does the noTone function do in the given code?

• Stops the serial communication

• Turns off the LED

• Pauses the program execution

• Turns off the buzzer

What is the purpose of the analogRead function in Arduino programming?

• Reads the state of a digital pin

• Reads the state of an analog pin

• Writes a HIGH voltage to an analog pin

• Writes a LOW voltage to an analog pin

What does the analogWrite function do in the given code?

• Writes a HIGH voltage to an analog pin

• Writes a LOW voltage to an analog pin

• Generates a random tone

• Plays a tone on the buzzer