Newly Optimized RF24Network Layer  v1.0.7
2014-2015 - Optimized RF24 Network Layer for NRF24L01 radios

Simplest possible example of using RF24Network. Put this sketch on one node, and helloworld_rx.pde on the other. Tx will send Rx a nice message every 2 seconds which rx will print out for us.

Copyright (C) 2012 James Coliz, Jr. <>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
Update 2014 - TMRh20
* Simplest possible example of using RF24Network
* Every 2 seconds, send a payload to the receiver node.
#include <RF24Network.h>
#include <RF24.h>
#include <SPI.h>
RF24 radio(7,8); // nRF24L01(+) radio attached using Getting Started board
RF24Network network(radio); // Network uses that radio
const uint16_t this_node = 01; // Address of our node in Octal format
const uint16_t other_node = 00; // Address of the other node in Octal format
const unsigned long interval = 2000; //ms // How often to send 'hello world to the other unit
unsigned long last_sent; // When did we last send?
unsigned long packets_sent; // How many have we sent already
struct payload_t { // Structure of our payload
unsigned long ms;
unsigned long counter;
void setup(void)
network.begin(/*channel*/ 90, /*node address*/ this_node);
void loop() {
network.update(); // Check the network regularly
unsigned long now = millis(); // If it's time to send a message, send it!
if ( now - last_sent >= interval )
last_sent = now;
payload_t payload = { millis(), packets_sent++ };
RF24NetworkHeader header(/*to node*/ other_node);
bool ok = network.write(header,&payload,sizeof(payload));
if (ok)