// rf95_server.pde
// -*- mode: C++ -*-
// Example sketch showing how to create a simple messageing server
// with the RH_RF95 class. RH_RF95 class does not provide for addressing or
// reliability, so you should only use RH_RF95  if you do not need the higher
// level messaging abilities.
// It is designed to work with the other example rf95_client
// Tested with Anarduino MiniWirelessLoRa, Rocket Scream Mini Ultra Pro with
// the RFM95W, Adafruit Feather M0 with RFM95

#include <SPI.h>
#include <RH_RF95.h>

// Singleton instance of the radio driver
RH_RF95 rf95(10,2);

int led = 13; // do not use SPI pins

void setup() 
{
  // Rocket Scream Mini Ultra Pro with the RFM95W only:
  // Ensure serial flash is not interfering with radio communication on SPI bus
//  pinMode(4, OUTPUT);
//  digitalWrite(4, HIGH);

  pinMode(led, OUTPUT);     
  Serial.begin(9600);
  while (!Serial) ; // Wait for serial port to be available
  Serial.println("Server starting");
  
  if (!rf95.init())
    {
    Serial.println("init failed");  
    while(true) ;
    }
    
  Serial.println("rf95.init() ok");

  // Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on

 
  rf95.setFrequency(868.0);
  //rf95.setTxPower(10, true);
   
}

void loop()
{
  
  if (rf95.available())
    {
      Serial.print("rf95.available() ok ");
      
    // 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))
      {

      //RH_RF95::printBuffer("request: ", buf, len);
      
      Serial.print("got request: ");
      Serial.println((char*)buf);
      
      //Serial.print("RSSI: ");
      //Serial.println(rf95.lastRssi(), DEC);
      
      // Send a reply
      digitalWrite(led, HIGH);
      Serial.println("Sending a reply");
      
      uint8_t data[] = "And hello back to you";
      rf95.send(data, sizeof(data));
      rf95.waitPacketSent();
      
      Serial.println("Reply sent");
      digitalWrite(led, LOW);
      }
    else
      {
      Serial.println("recv failed - empty buffer");
      }
    }
}