Why sensor interfacing is essential in Arduino - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read an analog value from a sensor connected to pin A0.

Arduino

int sensorValue = analogRead([1]);

Drag options to blanks, or click blank then click option'

AA0

B13

C5

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using a digital pin number instead of an analog pin like A0.

The sensor is connected to analog pin A0, so we use analogRead(A0) to read its value.

2fill in blank

medium

Complete the code to initialize serial communication at 9600 baud rate.

Arduino

Serial.[1](9600);

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Ainit

Bstart

Copen

Dbegin

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect function names like start or init instead of begin.

To start serial communication, we use Serial.begin(9600);.

3fill in blank

hard

Fix the error in the code to print the sensor value to the serial monitor.

Arduino

Serial.print([1]);

Drag options to blanks, or click blank then click option'

Asensor_value

BsensorValue

CSensorValue

Dsensorvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong capitalization for variable names.

The variable name is case sensitive and defined as sensorValue.

4fill in blank

hard

Fill both blanks to read a sensor value and print it with a label.

Arduino

int value = analogRead([1]);
Serial.print("Value: ");
Serial.[2](value);

Drag options to blanks, or click blank then click option'

AA1

Bprintln

CA0

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong pin names or using print instead of println.

The sensor is connected to analog pin A0, and Serial.println(value); prints the value with a new line.

5fill in blank

hard

Fill all three blanks to read a sensor, check if value is above 500, and print a message.

Arduino

int sensorVal = analogRead([1]);
if (sensorVal [2] 500) {
  Serial.[3]("High value detected");
}

Drag options to blanks, or click blank then click option'

AA2

B>

Cprintln

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong pin, wrong comparison operator, or print instead of println.

Read from analog pin A2, check if value is greater than 500, and print the message with println.