Displaying sensor data on screen in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read the sensor value.

Arduino

int sensorValue = analogRead([1]);

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AA0

B5

C13

DLED_BUILTIN

Attempts:

3 left

💡 Hint

Common Mistakes

Using a digital pin number instead of an analog pin.

Using LED_BUILTIN instead of the sensor pin.

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 the serial communication.

Arduino

Serial.begin([1]);

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A19200

B4800

C115200

D9600

Attempts:

3 left

💡 Hint

Common Mistakes

Using a baud rate that does not match the serial monitor setting.

Choosing a very low or very high baud rate without reason.

9600 baud rate is the standard speed for serial communication in many Arduino examples.

3fill in blank

hard

Fix the error in printing the sensor value to the serial monitor.

Arduino

Serial.println([1]);

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AanalogRead

BsensorValue

Cvalue

Dsensor

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name that was never declared.

Trying to print the function name instead of the variable.

The variable holding the sensor reading is sensorValue, so we print that.

4fill in blank

hard

Fill both blanks to create a dictionary-like structure to store sensor names and values.

Arduino

String sensorData = "[1]: " + String([2]);

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ATemperature

BsensorValue

CHumidity

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name instead of a string for the sensor name.

Not converting the sensor value to a string before concatenation.

We label the data as "Temperature" and convert the sensor value to a string to combine them.

5fill in blank

hard

Fill all three blanks to read sensor data, convert it, and print with a label.

Arduino

int [1] = analogRead(A0);
float [2] = [3] * (5.0 / 1023.0);
Serial.println("Voltage: " + String([2]));

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AsensorRaw

BsensorVoltage

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same variable name for both raw and converted values.

Not converting the raw value correctly to voltage.

We read raw sensor data into sensorRaw, convert it to voltage in sensorVoltage, and print the voltage.