Wireless Remote Using 2.4 Ghz NRF24L01 : Simple Tutorial Using of NRF24L01 & Arduino

Hello Everyone this is my second instructable . After lots of surfing on GOOGLE when I wont able to find a easy and a simple tutorial for NRF24L01 transceiver then I decided to publish an instructable on this. This is a simple short and easy tutorial for NRF24L01 Radio 2.4GHz Transmitter Receiver. In this tutorial I am going to control led using a pair of NRF24L01 transceiver.

The nRF24L01 is a highly integrated, ultra low power (ULP) 2Mbps RF transceiver IC for the 2.4GHz ISM (Industrial, Scientific and Medical) band. With peak RX/TX currents lower than 14mA, a sub μA power down mode, advanced power management, and a 1.9 to 3.6V supply range, the nRF24L01 provides a true ULP solution enabling months to years of battery lifetime when running on coin cells or AA/AAA batteries .

1. 2 PCS NRF24L01+2.4 GHz Wireless Transceiver module
2. 2 Arduino any (I have used one arduino R3 & nano)
3. Male to. femal jumpers
4. LED
5. Any Switch
6. 10K resistor

• Connect the following pins to your Arduino:as shown in figure
• Pin 9 - CE
• Pin 10 - CS(N)
• Pin 11 - MOSI
• Pin 12 - MISO
• Pin 13 - SCK
• 3.3v - VCC
• GND - GND
• On the Receiver Pin 3 - LED
• On the Transmitter Pin 7 - Button
• same connection for receiver and transmitter and you can use any arduino board

For coding arduino first we need some library files so follow the steps given below :

1. Download the ZIP file (library file zip folder from attachments ).

3. Unpack the ZIP file.

4. Go to arduino library folder

5. And paste both the folders named " nFR24L01" and "RF24" into it.

Now, program the Arduino receiver and transmitter

Code for Receiver

<p>#include <SPI.h><br>#include "nRF24L01.h"
#include "RF24.h"
int msg[1];
RF24 radio(9,10);
const uint64_t pipe = 0xE8E8F0F0E1LL;
int LED1 = 3;</p><p>void setup(void){
 Serial.begin(9600);
 radio.begin();
 radio.openReadingPipe(1,pipe);
 radio.startListening();
 pinMode(LED1, OUTPUT);}</p><p>void loop(void){
 if (radio.available()){
   bool done = false;    
   while (!done){
     done = radio.read(msg, 1);      
     Serial.println(msg[0]);
     if (msg[0] == 111){delay(10);digitalWrite(LED1, HIGH);}
     else {digitalWrite(LED1, LOW);}
     delay(10);}}
 else{Serial.println("No radio available");}}</p>

Code for Transmitter

<p>#include  <SPI.h><br>#include "nRF24L01.h"
#include "RF24.h"
int msg[1];
RF24 radio(9,10);
const uint64_t pipe = 0xE8E8F0F0E1LL;
int SW1 = 7;</p><p>void setup(void){
 Serial.begin(9600);
 radio.begin();
 radio.openWritingPipe(pipe);}</p><p>void loop(void){
 if (digitalRead(SW1) == HIGH){
 msg[0] = 111;
 radio.write(msg, 1);}}</p>

This is a last step after completing the circuit and coding part we can easily test it by switching "ON" and "OFF". .

When switch is "ON" on transmitter side connected to pin 7 of arduino then led glows on receivers side connected to pin 3 of arduino .Video Shows the output of this project.

THANKS HOPE THIS WILL HELP YOU