NRF24L01 Transmitting and Receiving in the same device

Using Arduino Networking, Protocols, and Devices
#1

Hello all,

I’m doing an Arduino project with 3 devices( Arduino Esplora + 2 Uno). Basically, when I press the Joystick Button in the Esplora, I’m sending a message to turn on one LED that is attached in one of the Arduinos Uno and also make this Arduino send a message to the other Arduino Uno, asking to print something on the screen.

Can someone help me?

Here is the code of all my 3 devices:

Arduino Esplora:

#include <nRF24L01.h>
#include <RF24.h>
#include <RF24_config.h>
#include <SPI.h>
#include <Esplora.h>
#include <TFT.h>

RF24 radio(11,3);
int buttonState = 0;

int msgW[1]; // Message that I am going to write

const uint64_t pipeW = 0xE8E8F0F0E1LL; // Channel I am going to use to send the message


void setup() 
{
  Serial.begin(57600);
  EsploraTFT.begin();
  radio.begin();
  radio.stopListening(); // Stop receiving information
  radio.openWritingPipe(pipeW);

}

void loop() 
{
  
 int buttonState; //The state of the pin where the toggle switch is
  buttonState = Esplora.readJoystickButton(); 

  if(buttonState == HIGH) //Not pressed
  {
    msgW[0] = 1;
    radio.write(msgW, 1);
  }
  
  else if(buttonState == LOW) // Pressed
  {
    msgW[0] = 0;
    radio.write(msgW, 1);

   }
}

Arduino Uno with the LED:

#include <nRF24L01.h>
#include <RF24.h>
#include <RF24_config.h>
#include <SPI.h>

const int buttonPin = 7;
RF24 radio(9,10);
int TC;

int msgR[1]; // Vector to save the message received
int msgW[1]; // Vector to save the message I'm going to send
const uint64_t pipeW= 0xE8E8F0F0E2LL; // Pipe I'm going to write to the other UNO
const uint64_t pipeR = 0xE8E8F0F0E1LL; // Pipe I'm going to read from Esplora

void setup() 
{
  Serial.begin(57600);
  pinMode(7,OUTPUT); // LED
  radio.begin();
  radio.openReadingPipe(1,pipeR);
  radio.startListening();
  
}
void loop() 
{
 
  radio.stopListening();
  radio.openWritingPipe(pipeW);
  TC = 4;
  msgW[0] = TC;
  radio.write(msgW,1);
  //radio.startListening();
  

  if(radio.available())
  {
    bool done = false;
    done = radio.read(msgR,1);
    
    if(msgR[0] == 1) // button not pressed
    {
      digitalWrite(buttonPin, LOW);
      Serial.println(msgR[0]); 
    }
    
    else if (msgR[0] == 0)
    {
      digitalWrite(buttonPin,HIGH);
      Serial.println(msgR[0]);
    }
  }  
}

Arduino Uno with the LCD:

#include <nRF24L01.h>
#include <RF24.h>
#include <RF24_config.h>
#include <SPI.h>

const int buttonPin = 7;
RF24 radio(9,10);

int msg[1];
const uint64_t pipeR = 0xE8E8F0F0E2LL; // Pipe I'm going to read to the other UNO

void setup() 
{
  Serial.begin(9600);
  radio.begin();
  radio.openReadingPipe(1,pipeR);
  radio.startListening();

}

void loop() 
{
  if (radio.available())
  {
    Serial.println("Signal Available");
    bool done = false;
    done = radio.read(msg,1);
    Serial.println(msg[0]);
    delay(1000);
  }
  Serial.println("No Signal!");
  delay(1000);
}

Thanks!

#2