// EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3

#include "EmonLib.h"                   // Include Emon Library
EnergyMonitor emon_conso;                   // Create an instance
EnergyMonitor emon_solar; 

#define NB_MESURES  50 

int lectures            = -10;
double sum_conso        = 0;
double sum_solar        = 0;
double last_conso_value = 0;
double last_solar_value = 0;
const int buttonPin = 2;     // the number of the pushbutton pin
boolean isDark = false;
  
#include <Wire.h> 
//#include <LiquidCrystal_I2C.h>
#include "LowPower.h"

#define I2C_SLAVE_ADDRESS 0x0B // 12 pour l'esclave 2 et ainsi de suite
#define PAYLOAD_SIZE 2

//LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

#include <ezButton.h>
ezButton button(7);  // create ezButton object that attach to pin 7;


void setup()
{  
  Serial.begin(9600);
  
  emon_conso.current(0, 60);             // Current: input pin, calibration.
  emon_solar.current(1, 60);

  Wire.begin(I2C_SLAVE_ADDRESS);
  Serial.begin(9600); 
  Serial.println("Slave -------------------------------------I am Slave1");
  delay(1000);               
  Wire.onRequest(requestEvents);
  Wire.onReceive(receiveEvents);

  pinMode(buttonPin, INPUT);
  pinMode(6, OUTPUT);

//  lcd.init();                      // initialize the lcd 


  delay(500);

}
int bcl = 0;
void loop()
{
  if (isDark) {
    Serial.println("Slave Dark, go to sleep");
    delay(100);
    LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
    //LowPower.idle(SLEEP_8S, ADC_OFF, TIMER2_OFF, TIMER1_OFF, TIMER0_OFF, SPI_OFF, USART0_OFF, TWI_OFF);
        
  }
    button.loop(); // MUST call the loop() function first

  int btnState = button.getState();
  //Serial.println(btnState);
  
  double Irms_conso = emon_conso.calcIrms(1480);  // Calculate Irms_conso only
  double Irms_solar = emon_solar.calcIrms(1480);  // Calculate Irms_conso only

  lectures ++;
  
  delay(10);
  if (lectures > 0) {
    sum_conso += Irms_conso;
    sum_solar += Irms_solar;

    if (lectures == NB_MESURES) { 
      last_conso_value = sum_conso / lectures;
      last_solar_value = sum_solar / lectures;
      lectures = -10;
      sum_conso = 0;
      sum_solar = 0;

      //delay(2000);
    }
  }

//  Serial.println("Slave Conso  :" + String(bcl) + " " + String(sum_conso / lectures));
//  Serial.println("Slave Solaire:" + String(sum_solar / lectures)); 
  
  bcl ++;   
//    // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
//    if (btnState == 0) {
//      // digitalWrite(6, HIGH);
//
//      lcd.backlight();
////      for(int i=1024; i>0; i-=25){
////         analogWrite(6, i);
////         delay(500);
////         lcd.clear();
////         lcd.setCursor(0,0);
////         lcd.print("i " + String(i));
////      }
//    }
//    else {
//      lcd.noBacklight();
//      // digitalWrite(6, LOW);
//    }
//    //lcd.backlight();
//    if (lectures > 0) {
//    lcd.clear();
//    lcd.setCursor(0,0);
//    lcd.print("Conso  :" + String(bcl) + " " + String(sum_conso / lectures));
//    lcd.setCursor(0,1);
//    lcd.print("Solaire:" + String(sum_solar / lectures)); 
//    }
  
}


void requestEvents()
{
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);                       // wait for a second
   
  
  Serial.println(F("---> received request"));
  Serial.print(F("sending value : "));
  char TempString[10];  //  Hold The Convert Data
  dtostrf(last_conso_value,2,2,TempString);
  Serial.println(TempString);

  Wire.write(TempString);
  Wire.write(";");

  dtostrf(last_solar_value,2,2,TempString);
  Serial.println(TempString);

  Wire.write(TempString);
  Wire.write("\n");

  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);
}

void receiveEvents(int numBytes)
{  
  Serial.println(F("---> received events"));
//  int n = Wire.read();
//  Serial.print(numBytes);
//  Serial.println(F("bytes received"));
//  Serial.print(F("received value : "));
//  Serial.println(n);
  String data = "";
  while(Wire.available()) // loop through all but the last
  {
    char c = Wire.read(); // receive byte as a character
    Serial.print(c);         // print the character
    data = data + c;
  }
  if (data == "jour") {
    isDark = false;
  }
  if (data == "nuit") {
    isDark = true;
  }
}