NRF24L01

// http://www.bajdi.com
// Sending a struct with the nRF24L01 module
// Data to be sent is the reading of 2 analog pins
// Data received is the analog reading of 2 pins on the other Arduino 

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

RF24 radio(1,2);  // make sure this corresponds to the pins you are using
const uint64_t pipes[2] = { 
  0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };

const int led = 0;

typedef struct{
  int A;
  int B;
  float C;
  float D;
}
A_t;

typedef struct{
  int W;
  int X;
  float Y;
  float Z;
}
B_t;

A_t duino1;  
B_t duino2; 

void setup()
{
  Serial.begin(57600);
  pinMode(led, OUTPUT);
  radio.begin();
  radio.openWritingPipe(pipes[0]);
  radio.openReadingPipe(1,pipes[1]);
}

void loop(void)
{
  // we need data to sent...
  duino2.W = analogRead(A0);
  duino2.X = analogRead(A1);
  duino2.Y = analogRead(A0)/102.3;
  duino2.Z = analogRead(A1)/102.3;
  // end of analog reading

  // radio stuff
  radio.stopListening();
  bool ok = radio.write( &duino2, sizeof(duino2) );
  radio.startListening();

  unsigned long started_waiting_at = millis();
  bool timeout = false;
  while ( ! radio.available() && ! timeout )
    if (millis() - started_waiting_at > 250 )
      timeout = true;

  if ( timeout )
  {
    Serial.println("Failed, response timed out.");
    digitalWrite(led, HIGH);
  }
  else
  {
    radio.read( &duino1, sizeof(duino1) );
    digitalWrite(led, LOW);
  }
  // end of radio stuff

  // serial print received data
  Serial.print("duino1.A = ");
  Serial.println(duino1.A);
  Serial.print("duino1.B = ");
  Serial.println(duino1.B);
  Serial.print("duino1.C = ");
  Serial.println(duino1.C);
  Serial.print("duino1.D = ");
  Serial.println(duino1.D);
  // end of serial printing
}

============================================================

// http://www.bajdi.com
// Sending a struct with the nRF24L01 module
// Data to be sent is the reading of 2 analog pins
// Data received is the analog reading of 2 pins on the other Arduino 

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

typedef struct{
  int A;
  int B;
  float C;
  float D;
}
A_t;

typedef struct{
  int W;
  int X;
  float Y;
  float Z;
}
B_t;

A_t duino1;  
B_t duino2;

RF24 radio(8,9);   // make sure this corresponds to the pins you are using
const uint64_t pipes[2] = { 
  0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };

void setup()
{
  Serial.begin(57600);
  radio.begin();
  radio.openWritingPipe(pipes[1]);
  radio.openReadingPipe(1,pipes[0]);
  radio.startListening();
}

void loop(void)
{ 
  // we need data to sent...
  duino1.A = analogRead(A0);
  duino1.B = analogRead(A1);
  duino1.C = analogRead(A0)/102.3;
  duino1.D = analogRead(A1)/102.3;
  // end of analog reading

  // radio stuff
  if ( radio.available() )
  {
    bool done = false;
    while (!done)
    {
      done = radio.read( &duino2, sizeof(duino2) );
    }
    radio.stopListening();
    radio.write( &duino1, sizeof(duino1) );
    radio.startListening();
  }
  // end of radio stuff

  // serial print received data 
  Serial.print("duino2.W = ");
  Serial.println(duino2.W);
  Serial.print("duino2.X = ");
  Serial.println(duino2.X);
  Serial.print("duino2.Y = ");
  Serial.println(duino2.Y);
  Serial.print("duino2.Z = ");
  Serial.println(duino2.Z);
  // end of serial printing
}