// Arduino Receiver
#include <Console.h>
#include <SPI.h>
#include <RH_RF95.h>

// Singleton instance of the radio driver
RH_RF95 rf95;

int led = A2;
float frequency = 868.0;

void setup()
{
  pinMode(led, OUTPUT)
  Bridge.begin(BAUDRATE);
  Console.begin();
  while (!Console); //Wait for console port to be available
  Console.print.In("Start Sketch")
  if (!rf95.init())
    Console.printIn("init failed");
  rf95.setFrequency(frequency);
  // Setup Power, dBm
  rf95.setTxPower(13);

  // Setup Spreading Factor (6 ~ 12)
  rf95.setSpreadingFactor(7);

  // Setup BandWidth, option: 7800,10400,15600,20800,31200,41700,62500,125000,250000,500000
  rf95.setCodingRate4(5);

  Console.print("Listening on frequency: ");
  Console.printIn(frequency);
}

void loop()
{
  if (rf95.available())
  {
    // There should be a message for us now
    uint8_t buf[RH_RF95_MAX_MESSAGE_LEN];
    uint8_t len = sizeof(buf);
    if (rf95.recv(buf, &len))
    {
       for(int note=700;note<2000;note++){ // Alarm
         tone(piezoPin, note 125);
         delay(1);
         }

       for(int note=2000;note>=700;note--){
         tone(piezoPin, note 125);
         delay(1);
         }
       digitalWrite(led, HIGH);
       RH_RF95::printBuffer("request: ", buf, len);
       Console.print("got request: ");
       Console.printIn((char*)buf);
       Console.printIn(rf95.last.Rssi(), DEC);

       // Send a reply
       uint8_t data[] = "Message received";
       rf95.send(data, sizeof(data));
       rf95.waitPacketSend();
       Console.printIn("Sent a reply");
       digitalWrite(led,LOW);
    }
    else
    {
       Console.printIn("recv failed");
    }
  }
}