/* 
 *  ------ P2P Code Example --------
 * 
 *  Explanation: This example shows how to configure the module
 *  for P2P mode and the corresponding parameters. After this,
 *  the example shows how to receive packets from other radio modules
 *  which must be set with the same radio settings
 * 
 *  Copyright (C) 2015 Libelium Comunicaciones Distribuidas S.L.
 *  http://www.libelium.com
 * 
 *  This program is free software: you can redistribute it and/or modify 
 *  it under the terms of the GNU General Public License as published by 
 *  the Free Software Foundation, either version 3 of the License, or 
 *  (at your option) any later version. 
 *   
 *  This program is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *  GNU General Public License for more details. 
 *   
 *  You should have received a copy of the GNU General Public License 
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 *  Version:           1.3
 *  Design:            David Gascon
 *  Implementation:    Luismi Marti
 *  Ported to Arduino: Ruben Martin
 */

#include <Wire.h>

// Cooking API libraries
#include <arduinoUART.h>
#include <arduinoUtils.h>

// LoRaWAN library
#include <arduinoLoRaWAN.h>

// Pin definition for LoRaWAN module error LED:
const int error_led =  13;

//////////////////////////////////////////////
uint8_t socket = SOCKET1;
//////////////////////////////////////////////

// define radio settings
//////////////////////////////////////////////
uint8_t power = 15;
uint32_t frequency = 868100000;
char spreading_factor[] = "sf12";
char coding_rate[] = "4/5";
uint16_t bandwidth = 125;
char crc_mode[] = "on";
//////////////////////////////////////////////


// variable
uint8_t error;


void setup()
{
  //Radio P2P example - Receiving packets
  pinMode(error_led, OUTPUT);
  digitalWrite(error_led, LOW);

  // module setup
  error = radioModuleSetup();
 
  // Check status
  if (error == 0)
  {
    //Module configured OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //Module configured ERROR
    digitalWrite(error_led, HIGH);
  } 
}


void loop()
{
 
  //Listening to packets...
 
  // rx
  error = LoRaWAN.receiveRadio(10000);
 
  // Check status
  if (error == 0)
  {
    //--> Packet received
    //packet in LoRaWAN._buffer
    //length in LoRaWAN._length
    digitalWrite(error_led, LOW);
    // get SNR
    LoRaWAN.getRadioSNR();
    Serial.print("Packet length  = ");
    Serial.println(LoRaWAN._length);
    Serial.println("Packet content: ");
    for (int i = 0; i < LoRaWAN._length; i++)
      Serial.println(LoRaWAN._buffer[i]);
    Serial.print("Signal to Noise Ratio = ");
    Serial.println(LoRaWAN._radioSNR);
    //SNR in LoRaWAN._radioSNR
  }
  else
  {
    //Error waiting for packets. error
    // error code
    //  1: error
    //  2: no incoming packet
    digitalWrite(error_led, HIGH);
  } 
}


/***********************************************************************************
*
* radioModuleSetup()
*
*   This function includes all functions related to the module setup and configuration
*   The user must keep in mind that each time the module powers on, all settings are set
*   to default values. So it is better to develop a specific function including all steps
*   for setup and call it everytime the module powers on.
*
*
***********************************************************************************/
uint8_t radioModuleSetup()
{

  uint8_t status = 0;
  uint8_t e = 0;
 
  //////////////////////////////////////////////
  // 1. switch on
  //////////////////////////////////////////////
  e = LoRaWAN.ON(socket);

  // Check status
  if (e == 0)
  {
    //1. Switch ON OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //1. Switch ON error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  //////////////////////////////////////////////
  // 2. Enable P2P mode
  //////////////////////////////////////////////
  e = LoRaWAN.macPause();

  // Check status
  if (e == 0)
  {
    //2. P2P mode enabled OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //2. Enable P2P mode error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  //////////////////////////////////////////////
  // 3. Set/Get Radio Power
  //////////////////////////////////////////////

  // Set power
  e = LoRaWAN.setRadioPower(power);

  // Check status
  if (e == 0)
  {
    //3.1. Set Radio Power OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //3.1. Set Radio Power error
    digitalWrite(error_led, HIGH);
    status = 1;
  }

  // Get power
  e = LoRaWAN.getRadioPower();

  // Check status
  if (e == 0)
  {
    //3.2. Get Radio Power OK.
    //"Power in LoRaWAN._radioPower
    digitalWrite(error_led, LOW);
  }
  else
  {
    //3.2. Get Radio Power error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  //////////////////////////////////////////////
  // 4. Set/Get Radio Frequency
  //////////////////////////////////////////////

  // Set frequency
  e = LoRaWAN.setRadioFreq(frequency);

  // Check status
  if (e == 0)
  {
    //4.1. Set Radio Frequency OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //4.1. Set Radio Frequency error
    digitalWrite(error_led, LOW);
    status = 1;
  }

  // Get frequency
  e = LoRaWAN.getRadioFreq();

  // Check status
  if (e == 0)
  {
    //4.2. Get Radio Frequency OK
    //Frequency in LoRaWAN._radioFreq
    digitalWrite(error_led, LOW);
  }
  else
  {
    //4.2. Get Radio Frequency error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  //////////////////////////////////////////////
  // 5. Set/Get Radio Spreading Factor (SF)
  //////////////////////////////////////////////

  // Set SF
  e = LoRaWAN.setRadioSF(spreading_factor);

  // Check status
  if (e == 0)
  {
    //5.1. Set Radio SF OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //5.1. Set Radio SF error
    digitalWrite(error_led, HIGH);
    status = 1;
  }

  // Get SF
  e = LoRaWAN.getRadioSF();

  // Check status
  if (e == 0)
  {
    //5.2. Get Radio SF OK
    //Spreading Factor in LoRaWAN._radioSF
    digitalWrite(error_led, LOW);
  }
  else
  {
    //5.2. Get Radio SF error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  //////////////////////////////////////////////
  // 6. Set/Get Radio Coding Rate (CR)
  //////////////////////////////////////////////

  // Set CR
  e = LoRaWAN.setRadioCR(coding_rate);

  // Check status
  if (e == 0)
  {
    //6.1. Set Radio CR OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //6.1. Set Radio CR error
    digitalWrite(error_led, HIGH);
    status = 1;
  }

  // Get CR
  e = LoRaWAN.getRadioCR();

  // Check status
  if (e == 0)
  {
    //6.2. Get Radio CR OK.
    //Coding Rate in LoRaWAN._radioCR
    digitalWrite(error_led, LOW);
  }
  else
  {
    //6.2. Get Radio CR error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  //////////////////////////////////////////////
  // 7. Set/Get Radio Bandwidth (BW)
  //////////////////////////////////////////////

  // Set BW
  e = LoRaWAN.setRadioBW(bandwidth);

  // Check status
  if (e == 0)
  {
    //7.1. Set Radio BW OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //7.1. Set Radio BW error
    digitalWrite(error_led, HIGH);
  }

  // Get BW
  e = LoRaWAN.getRadioBW();

  // Check status
  if (e == 0)
  {
    //7.2. Get Radio BW OK.
    //Bandwidth in LoRaWAN._radioBW
    digitalWrite(error_led, LOW);
  }
  else
  {
    //7.2. Get Radio BW error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  //////////////////////////////////////////////
  // 8. Set/Get Radio CRC mode
  //////////////////////////////////////////////

  // Set CRC
  e = LoRaWAN.setRadioCRC(crc_mode);

  // Check status
  if (e == 0)
  {
    //8.1. Set Radio CRC mode OK
    digitalWrite(error_led, LOW);
  }
  else
  {
    //8.1. Set Radio CRC mode error
    digitalWrite(error_led, HIGH);
    status = 1;
  }

  // Get CRC
  e = LoRaWAN.getRadioCRC();

  // Check status
  if (e == 0)
  {
    //8.2. Get Radio CRC mode OK.
    //CRC status in LoRaWAN._crcStatus
    digitalWrite(error_led, LOW);
  }
  else
  {
    //8.2. Get Radio CRC mode error
    digitalWrite(error_led, HIGH);
    status = 1;
  }
  //-------------------------------------------------------

  return status;
}