#include <LoRa.h> 
//int pot = A0;
const int SW1 = 3;
const int SW2 = 4;


int SyncWord = 0x22;
 
void setup() {
  Serial.begin(9600);
  pinMode(SW1,INPUT_PULLUP);
  pinMode(SW2,INPUT_PULLUP);

  cli();                                    //stop interrupts
                                            //set timer1 interrupt at 1Hz = 1sec
  TCCR1A = 0;                               // set entire TCCR1A register to 0
  TCCR1B = 0;                               // same for TCCR1B
  TCNT1  = 0;                               // initialize counter value to 0
                                            // set compare match register for 1hz increments
  OCR1A = 15624;                            // = (16*10^6) / (1*1024) - 1 (must be <65536)
                                            
  TCCR1B |= (1 << WGM12);                   // turn on CTC mode                                      
  TCCR1B |= (1 << CS12) | (1 << CS10);      // Set CS10 and CS12 bits for 1024 prescaler                                          
  TIMSK1 |= (1 << OCIE1A);                  // enable timer compare interrupt

  sei();                                    //allow interrupts
  
  while (!Serial);  
  Serial.println("LoRa Sender");
  if (!LoRa.begin(433E6)) { // or 915E6, the MHz speed of yout module
    Serial.println("Starting LoRa failed!");
    while (1);
  }
  
  LoRa.setSpreadingFactor(12);           // ranges from 6-12,default 7 see API docs
  LoRa.setSignalBandwidth(62.5E3 );           // for -139dB (page - 112)
  LoRa.setCodingRate4(8);                   // for -139dB (page - 112)
  LoRa.setSyncWord(SyncWord);
/*
  Serial.print("current spreading factor : ");
  Serial.println(LoRa.getSpreadingFactor());
  Serial.print("current bandwidth : ");
  Serial.println(LoRa.getSignalBandwidth());
  Serial.println("LoRa init succeeded.");
  */
}

int priviousSwitchValue1 = 1;
int priviousSwitchValue2 = 1;
int liveSwitchValue1 = 0;
int liveSwitchValue2 = 0;
bool switchPressFlag1 = false;
bool switchPressFlag2 = false;
bool gLedPin = 0;

int data = 1;

void loop() {
  //static int data = 1;
  
  liveSwitchValue1 = digitalRead(SW1);
  if( (liveSwitchValue1 == 0) and (switchPressFlag1 == false) )
  {
    delay(50);
    data = 11;
    Serial.println("11");
    switchPressFlag1 = true;
    priviousSwitchValue1 = !priviousSwitchValue1;

    LoRa.beginPacket();  
    LoRa.print(data);
    LoRa.endPacket();
  }
  if( (liveSwitchValue1 == 1) and (switchPressFlag1 == true) )
  {
    delay(50);
    data = 22;
    Serial.println("22");
    switchPressFlag1 = false;
    LoRa.beginPacket();  
    LoRa.print(data);
    LoRa.endPacket();
  }
  
  liveSwitchValue2 = digitalRead(SW2);
  if( (liveSwitchValue2 == 0) and (switchPressFlag2 == false))
  {
    delay(50);
    data = 33;
    Serial.println("33");
    switchPressFlag2 = true;
    priviousSwitchValue2 = !priviousSwitchValue2;
    LoRa.beginPacket();  
    LoRa.print(data);
    LoRa.endPacket();
  }
  if( (liveSwitchValue2 == 1) and (switchPressFlag2 == true) )
  {
    delay(50);
    data = 44;
    Serial.println("44");
    switchPressFlag2 = false;
    LoRa.beginPacket();  
    LoRa.print(data);
    LoRa.endPacket();
  }

  
  if(gLedPin == 1)
  {
    data = 55;
    Serial.println("55");
    gLedPin = 0;
    LoRa.beginPacket();  
    LoRa.print(data);
    LoRa.endPacket();
  }
  
  // LoRa.beginPacket();  
  // LoRa.print(data);
  // LoRa.endPacket();
}

ISR(TIMER1_COMPA_vect){//timer1 interrupt 1Hz toggles pin 13 (LED)
//generates pulse wave of frequency 1Hz/2 = 0.5kHz (takes two cycles for full wave- toggle high then toggle low)
  static volatile int ledFlag = 0;
  if(++ledFlag >= 5)
  {
    gLedPin = 1;
    ledFlag = 0;
  }
}