Robin Kanattu Thomas
Published © GPL3+

Wireless Connection Between Micro Controllers Using nRF24L01

nRF24L01 radio transceiver provides very efficient and inexpensive way to establish communication between microcontrollers.

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Wireless Connection Between Micro Controllers Using nRF24L01

Things used in this project

Hardware components

nRF24L01
×2
Jumper wires (generic)
Jumper wires (generic)
×1
Breadboard (generic)
Breadboard (generic)
×1
Arduino UNO
Arduino UNO
×2
Pushbutton switch 12mm
SparkFun Pushbutton switch 12mm
×1
Servos (Tower Pro MG996R)
×1
Resistor 475 ohm
Resistor 475 ohm
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

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Schematics

nRF24L01 Receiver

nRf24l01 Transmitter

Code

nRF240L1 Transmitter

C/C++
#include <SPI.h>
#include <RF24.h>
#include <nRF24L01.h>

int msg[1];
RF24 radio(9,10);//check your pin number on RF24 github check you have the right
//pin for the arduino you're using. this pin number is diffrent for diffrent arduino models.

const uint64_t pipe = 0xF0F0F0F0D2L;

int buttonPin1 = 5;
int buttonState1 = 0;

void setup(void)
{
  Serial.begin(9600);
  radio.begin();
  radio.openWritingPipe(pipe);
  pinMode(buttonPin1, INPUT);
  
}

void loop(void)
{
  buttonState1 = digitalRead(buttonPin1);
 
  
  if (buttonState1 == HIGH)
  {
    msg[0] = 212;
    radio.write(msg, 1);
  }
 
}

nRF24L01 receiver

C/C++
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include <Servo.h>      // include the Servo library 
Servo myServo;   

int msg[1];
RF24 radio(9,10);//check your pin number on RF24 github check you have the right
//pin number for the arduino you're using. this pin is diffrent for diffrent arduino models.

const uint64_t pipe = 0xF0F0F0F0D2L;


void setup(void)
{
 myServo.attach(3);
  Serial.begin(9600);
  radio.begin();
  radio.openReadingPipe(1, pipe);
  radio.startListening();
  myServo.write(0);      // initial position of servo at angle 0
 
}

void loop(void)
{
  if(radio.available()){
    bool done = false;
    while (!done) {
      done = radio.read(msg, 1);
      Serial.println(msg[0]);
      if (msg[0] == 212) {
       myServo.write(180); 
      }
      else {   
            myServo.write(0); 
      }
    }
  }
}

Credits

Robin Kanattu Thomas

Robin Kanattu Thomas

13 projects • 179 followers
Electronics Enthusiast, Micro controller fan and love Open Source.

Comments

Related channels and tags
  • Arduino
  • Communication
  • Internet of Things
  • SparkFun