// rf22_router_server2.pde
// -*- mode: C++ -*-
// Example sketch showing how to create a simple addressed, routed reliable messaging server
// with the RHRouter class.
// It is designed to work with the other example rf22_router_client

#include <RHRouter.h>
#include <RH_RF22.h>
#include <SPI.h>

// In this small artifical network of 4 nodes,
// messages are routed via intermediate nodes to their destination
// node. All nodes can act as routers
// CLIENT_ADDRESS <-> SERVER1_ADDRESS <-> SERVER2_ADDRESS<->SERVER3_ADDRESS
#define CLIENT_ADDRESS 1
#define SERVER1_ADDRESS 2
#define SERVER2_ADDRESS 3
#define SERVER3_ADDRESS 4

// Singleton instance of the radio
RH_RF22 driver;

// Class to manage message delivery and receipt, using the driver declared above
RHRouter manager(driver, SERVER2_ADDRESS);

void setup() 
{
  Serial.begin(9600);
  if (!manager.init())
    Serial.println("init failed");
  // Defaults after init are 434.0MHz, 0.05MHz AFC pull-in, modulation FSK_Rb2_4Fd36
  
  // Manually define the routes for this network
  manager.addRouteTo(CLIENT_ADDRESS, CLIENT_ADDRESS);  
  manager.addRouteTo(SERVER2_ADDRESS, SERVER2_ADDRESS);
  manager.addRouteTo(SERVER3_ADDRESS, SERVER2_ADDRESS);
}

uint8_t data[] = "And hello back to you from server2";
// Dont put this on the stack:
uint8_t buf[RH_ROUTER_MAX_MESSAGE_LEN];

void loop()
{
  uint8_t len = sizeof(buf);
  uint8_t from;
  if (manager.recvfromAck(buf, &len, &from))
  {
    Serial.print("got request from : 0x");
    Serial.print(from, HEX);
    Serial.print(": ");
     Serial.println((char*)buf);

    // Send a reply back to the originator client
    if (manager.sendtoWait(data, sizeof(data), from) != RH_ROUTER_ERROR_NONE)
      Serial.println("sendtoWait failed");
  }
}