Bluetooth with HC-05/HC-06 module in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize the serial communication with the HC-05 module at 9600 baud rate.

Arduino

Serial[1](9600);

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

Aprint

Bbegin

Cread

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Using print instead of begin to start communication.

Trying to read or write before starting communication.

The begin function starts serial communication at the specified baud rate.

2fill in blank

medium

Complete the code to read data from the Bluetooth module when available.

Arduino

if (Serial.available() [1] 0) {
  char data = Serial.read();
}

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

A<=

B<

C>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using == 0 which means no data available.

Using less than operators which are incorrect here.

The Serial.available() function returns the number of bytes available to read. We check if it is greater than 0 to read data.

3fill in blank

hard

Fix the error in the code to send a string "Hello" over Bluetooth.

Arduino

Serial.[1]("Hello");

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

Aread

Bavailable

Cbegin

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using read which reads data instead of sending.

Using begin which initializes communication.

To send data over serial, use print or println. Here, print sends the string.

4fill in blank

hard

Fill both blanks to create a Bluetooth serial object on pins 10 (RX) and 11 (TX).

Arduino

SoftwareSerial bluetooth([1], [2]);

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

A10

B9

C11

D12

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping RX and TX pins.

Using pins not connected to the module.

The HC-05 module connects to Arduino pins 10 (RX) and 11 (TX) using SoftwareSerial.

5fill in blank

hard

Fill all three blanks to send the character 'A' only if data is available from Bluetooth.

Arduino

if (bluetooth.[1]() [2] 0) {
  bluetooth.[3]('A');
}

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

Aavailable

B>

Cprint

Dread

Attempts:

3 left

💡 Hint

Common Mistakes

Using read() instead of available() to check data.

Using < or == instead of > for comparison.

Using read() to send data.

Check if data is available with available(), compare with > 0, then send 'A' using print.