Two RF-Nanos communicating with a Push-Button and an LED

Description: Two RF-Nanos are connected via radio frequency. When a push-button is pressed the data is sent with radio waves to the other which turns an LED either On or Off.

Two RF-Nanos Communicating

Supplies:

1 – Breadboard 830 Points
2 – RF-Nanos   >> Link <<
1 – Push-Button
1 – LED
1 – 10k Ohm Resistor
1 – 220 Ohm Resistor

Arduino Code:

//  Transmitter(TX) Code:

#include “nRF24L01.h” //NRF24L01 library created by TMRh20 https://github.com/TMRh20/RF24
#include “RF24.h”
#include “SPI.h”

int button = 2;
int status = false;

int SentMessage[1] = {000};
RF24 radio(9,10);

const uint64_t pipe = 0xE6E6E6E6E6E6; // Needs to be the same for communicating between the two RF-Nanos

void setup() {

  pinMode(button, INPUT);
  radio.begin();
  radio.openWritingPipe(pipe); // ready to transmit

}

void loop() {

  if (digitalRead(button) == true) {
  status = !status;

  if (status == HIGH) {

  SentMessage[0] = 111;
  radio.write(SentMessage, 1); // Send pressed data to RF-Nano
}

  if (status == LOW) {

  SentMessage[0] = 000;
  radio.write(SentMessage, 1); // Send pressed data to RF-Nano
}

  while(digitalRead(button) == true);
  delay(10);

}
}

———————————————

//  Receiver Code:

#include “nRF24L01.h” // NRF24L01 library created by TMRh20 https://github.com/TMRh20/RF24
#include “RF24.h”
#include “SPI.h”

#define LED_PIN 4

int ReceivedMessage[1] = {000}; // Used to store value received by the RF-Nano
RF24 radio(9,10);

const uint64_t pipe = 0xE6E6E6E6E6E6; // Needs to be the same for communicating between the two RF-Nanos

void setup() {
  
  radio.begin();

  radio.openReadingPipe(1,pipe); // Get the RF-Nano ready to receive

  radio.startListening(); // Listen to see if information received

  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  
  while (radio.available())
{
  radio.read(ReceivedMessage, 1); // Read information from the RF-Nano

  if (ReceivedMessage[0] == 111) // Indicates button is pressed
{
  digitalWrite(LED_PIN, HIGH);
}
else
{
  digitalWrite(LED_PIN, LOW);
}
  delay(2);
}
}

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