Arduino Wireless Remote With 2.5ghz Nrf24l01

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Made by anas / Communication / Home Automation / Lights / Security

About the project

a simple NRF24L01 based transmitter and receiver. Transmitter is act as remote control and receiver will ON/OFF a LED according to data

Project info

Difficulty: Easy

Platforms: Arduino

Estimated time: 2 hours

Items used in this project

Hardware components

	ARD-PRO-MINI-5 AVR PRO MINI (ARDUINO) 5V/16MHZ	x 2
	TRNSCVRnRF24L01P-R CHP ULTR-LW POW 2.4GHz	x 2
	Ladyada's Electronics Toolkit	x 1

Software apps and online services

Arduino IDE

Story

In many projects we may need wireless communication between different microcontrollers. For that we are using different modules like XBee/Zigbee, simple RF, Bluetooth/BLE etc. Now on this blog I am going to explain a different wireless transceiver module NRF24L01 which is working on 2.5GHz ISM band frequency.

I was so lazy to work on this module since this is not a breadboard friendly module and I was not having female to male headers. And I was too lazy to make a connection circuit to this module to breadboard. Meanwhile I got an invitation from Collaborizm, a platform for entrepreneurs/engineers/creatives. I was about to have a look on a project on NRF24L01. So I tested my module for the first time.

NRF24L01 is designed for ultra low power wireless applications. It is a transceiver with an embedded base band protocol engine named Enhanced ShockBurst™. The module can be interfaced with Arduino or any other microcontrollers via SPI bus.

Applications

In wireless PC peripherals like keyboard, Mouse etc.

Remotes

Toys

Home automation

Asset tracking systems

Active RFID systems

Ultra low power sensor networks

Demo project

Here I am going to showcase a simple NRF24L01 based transmitter and receiver. Transmitter is act as remote control and receiver will ON/OFF a LED in accordance with the data received. I am using Arduino pro minis as my microcontrollers you can use your own Arduinos. You can find the Arduino library for NRF24l01 here.

Connection

nrf24L01------Arduino

vcc-----3.3V

GND----GND

MISO---pin12

MOSI---pin11

SCN---pin10

SCK---PIN13

CE----pin9

The connection is same for both transmitter and receiver you can find the Fritzing project files here

Transmitter

Receiver

You can find more info from my blog wiring it my way.

Schematics, diagrams and documents

Arduino Wireless Remote with 2.5GHz NRF24L01

Arduino Wireless Remote with 2.5GHz NRF24L01

transmitter

Arduino Wireless Remote with 2.5GHz NRF24L01

receiver

Code

Arduino Wireless Remote with 2.5GHz NRF24L01

transmitter code

    #include <SPI.h>
    #include "nRF24L01.h"
    #include "RF24.h"
 
    RF24 radio(9,10);
 
    const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
 
    typedef enum { role_ping_out = 1, role_pong_back } role_e;
 
    const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
 
    role_e role = role_pong_back;
 
    void setup(void)
    {
    Serial.begin(57600);
    pinMode(4,OUTPUT);
    radio.begin();
    radio.setRetries(15,15);
    radio.openReadingPipe(1,pipes[1]);
    radio.startListening();
    radio.printDetails();
    radio.openWritingPipe(pipes[1]);
    radio.openReadingPipe(1,pipes[0]);
    radio.startListening();
    }
 
    void loop(void)
    {
 
    if ( radio.available() )
    {
    unsigned long data = 0;
    radio.read( &data, sizeof(unsigned long) );
    Serial.println(data);
    if (data==1){digitalWrite(4,HIGH);}
    else{digitalWrite(4,LOW);}
 
    delay(20);
    }
    }

Arduino Wireless Remote with 2.5GHz NRF24L01

receiver code

    #include <SPI.h>
    #include "nRF24L01.h"
    #include "RF24.h"
 
    RF24 radio(9,10);
 
    const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
 
    typedef enum { role_ping_out = 1, role_pong_back } role_e;
 
    const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
 
    role_e role = role_pong_back;
 
    void setup(void)
    {
    Serial.begin(57600);
    pinMode(4,OUTPUT);
    radio.begin();
    radio.setRetries(15,15);
    radio.openReadingPipe(1,pipes[1]);
    radio.startListening();
    radio.printDetails();
    radio.openWritingPipe(pipes[1]);
    radio.openReadingPipe(1,pipes[0]);
    radio.startListening();
    }
 
    void loop(void)
    {
 
    if ( radio.available() )
    {
    unsigned long data = 0;
    radio.read( &data, sizeof(unsigned long) );
    Serial.println(data);
    if (data==1){digitalWrite(4,HIGH);}
    else{digitalWrite(4,LOW);}
 
    delay(20);
    }
    }

Arduino Wireless Remote with 2.5GHz NRF24L01

arduino library

Credits

anas

Electronics and communication engineer || DIY hobbyist || IoT enthusiast || Blogger||Startup||Medtech

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