RF communication with nRF24L01 in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include the library needed for nRF24L01 communication.

Arduino

#include <[1]>

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

ARF24.h

BSPI.h

CnRF24L01.h

DWire.h

Attempts:

3 left

💡 Hint

Common Mistakes

Including SPI.h only does not provide nRF24L01 functions.

Using nRF24L01.h is not the correct library name.

Wire.h is for I2C communication, not RF.

The RF24.h library is required to use the nRF24L01 module in Arduino.

2fill in blank

medium

Complete the code to create an RF24 object with CE pin 9 and CSN pin 10.

Arduino

RF24 radio([1], [2]);

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

A9

B10

C7

D8

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping CE and CSN pins.

Using pins not connected to the module.

The CE pin is 9 and the CSN pin is 10 for this setup.

3fill in blank

hard

Fix the error in the code to start the radio and check if it is available.

Arduino

void setup() {
  Serial.begin(9600);
  if (!radio.[1]()) {
    Serial.println("Radio hardware not responding!");
  }
}

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

Astart

Bbegin

CbeginTransmission

Dinit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'init' which are not valid RF24 methods.

Using 'beginTransmission' which is for I2C or SPI devices.

The correct method to initialize the radio is begin().

4fill in blank

hard

Fill both blanks to set the radio to writing mode and open a writing pipe with address '0xF0F0F0F0E1'.

Arduino

radio.[1]();
radio.[2](0xF0F0F0F0E1ULL);

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AstopListening

BstartListening

CopenWritingPipe

DopenReadingPipe

Attempts:

3 left

💡 Hint

Common Mistakes

Using startListening before sending data.

Opening a reading pipe instead of writing pipe for sending.

To send data, the radio must stop listening and open a writing pipe.

5fill in blank

hard

Fill all three blanks to send the string 'Hello' and check if the transmission was successful.

Arduino

const char text[] = "Hello";
bool [1] = radio.[2](text, sizeof(text));
if ([3]) {
  Serial.println("Sent successfully");
} else {
  Serial.println("Send failed");
}

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

Asuccess

Bwrite

Dsend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'send' which is not a method of RF24.

Not checking the return value of write.

The write method sends data and returns true if successful. The result is stored in success.