Sending data over Bluetooth in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

Arduino

void setup() {
  Serial.begin([1]);
}

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A4800

B115200

C9600

D19200

Attempts:

3 left

💡 Hint

Common Mistakes

Using a baud rate that does not match the Bluetooth module's setting.

Forgetting to initialize Serial communication.

The standard baud rate for Bluetooth serial communication is 9600.

2fill in blank

medium

Complete the code to send the string "Hello" over Bluetooth.

Arduino

void loop() {
  Serial.[1]("Hello");
  delay(1000);
}

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Aprint

Bavailable

Cwrite

Dread

Attempts:

3 left

💡 Hint

Common Mistakes

Using read which is for receiving data.

Using available which checks incoming data.

The print function sends data as readable text over serial.

3fill in blank

hard

Fix the error in the code to read a character from Bluetooth and store it in variable 'c'.

Arduino

char c;
void loop() {
  if (Serial.[1]() > 0) {
    c = Serial.read();
  }
}

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Awrite

Bbegin

Cprint

Davailable

Attempts:

3 left

💡 Hint

Common Mistakes

Using write() which sends data, not checks availability.

Using print() which sends data.

available() checks if data is ready to read from serial.

4fill in blank

hard

Fill both blanks to send the integer variable 'value' as a string over Bluetooth.

Arduino

int value = 123;
void loop() {
  Serial.[1](String([2]));
  delay(1000);
}

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Aprint

Bvalue

Cwrite

DSerial

Attempts:

3 left

💡 Hint

Common Mistakes

Using write which sends raw bytes, not readable text.

Passing a wrong variable or object.

Use print to send text, and convert the integer value to a string.

5fill in blank

hard

Fill all three blanks to read a line from Bluetooth and store it in 'inputString'.

Arduino

String inputString = "";
void loop() {
  if (Serial.[1]() > 0) {
    char c = Serial.[2]();
    if (c == [3]) {
      // end of line
    } else {
      inputString += c;
    }
  }
}

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

Aavailable

Bread

C'\n'

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Using write() instead of read().

Checking for wrong end-of-line character.

Check if data is available, read one character, and detect newline '\n' as line end.