// Arduino DS3232RTC Library
// https://github.com/JChristensen/DS3232RTC
// Copyright (C) 2018 by Jack Christensen and licensed under
// GNU GPL v3.0, https://www.gnu.org/licenses/gpl.html
//
// Example sketch to display the date and time from a DS3231
// or DS3232 RTC every second. Display the temperature once per
// minute. (The DS3231 does a temperature conversion once every
// 64 seconds. This is also the default for the DS3232.)
//
// Set the date and time by entering the following on the Arduino
// serial monitor:
//  year,month,day,hour,minute,second,
//
// Where
//  year can be two or four digits,
//  month is 1-12,
//  day is 1-31,
//  hour is 0-23, and
//  minute and second are 0-59.
//
// Entering the final comma delimiter (after "second") will avoid a
// one-second timeout and will allow the RTC to be set more accurately.
//
// No validity checking is done, invalid values or incomplete syntax
// in the input will result in an incorrect RTC setting.
//
// Jack Christensen 08Aug2013

#include <DS3232RTC.h>      // https://github.com/JChristensen/DS3232RTC
#include <Streaming.h>      // https://github.com/janelia-arduino/Streaming
#include <Servo.h>
#include <HX711_ADC.h>
#include <EEPROM.h>


//pins:
const int HX711_dout = 4; //mcu > HX711 dout pin
const int HX711_sck = 5; //mcu > HX711 sck pin

//HX711 constructor:
HX711_ADC LoadCell(HX711_dout, HX711_sck);

const int calVal_eepromAdress = 0;
unsigned long t = 0;
int  bfd1;
int lfd1;
int dfd1;
int stablecount = 0;
unsigned long preMillis = 0;
const int shold = 10;
const long checkint = 50;
unsigned long previousMillis = 0;
float lastweight = 0;
DS3232RTC myRTC;
Servo s1;
void setup()
{
    Serial.begin(115200);
     Serial.println();
     Serial.println("Starting...");
    s1.attach(9);
    LoadCell.begin();
      //LoadCell.setReverseOutput(); //uncomment to turn a negative output value to positive
  unsigned long stabilizingtime = 2000; // preciscion right after power-up can be improved by adding a few seconds of stabilizing time
  boolean _tare = true; //set this to false if you don't want tare to be performed in the next step
  LoadCell.start(stabilizingtime, _tare);
  if (LoadCell.getTareTimeoutFlag() || LoadCell.getSignalTimeoutFlag()) {
    Serial.println("Timeout, check MCU>HX711 wiring and pin designations");
    while (1);
  }
  else {
    LoadCell.setCalFactor(1.0); // user set calibration value (float), initial value 1.0 may be used for this sketch
    Serial.println("Startup is complete");
  }
  while (!LoadCell.update());
  calibrate(); //start calibration procedure
    Serial << F( "\n" __FILE__ "\n" __DATE__ " " __TIME__ "\n" );
    myRTC.begin();

    // setSyncProvider() causes the Time library to synchronize with the
    // external RTC by calling RTC.get() every five minutes by default.
    setSyncProvider(myRTC.get);
    Serial << F("RTC Sync");
    if (timeStatus() != timeSet) Serial << F(" FAIL!");
    Serial << endl;
}

void loop()
{
    static time_t tLast;
    time_t t;
    tmElements_t tm;
     static boolean newDataReady = 0;
  const int serialPrintInterval = 0; //increase value to slow down serial print activity

  // check for new data/start next conversion:
  if (LoadCell.update()) newDataReady = true;

  // get smoothed value from the dataset:
  if (newDataReady) {
    if (millis() > t + serialPrintInterval) {
      float i = LoadCell.getData();
      Serial.print("Load_cell output val: ");
      Serial.println(i);
      
      newDataReady = 0;
      t = millis();
      unsigned long currentmillis = millis();
     if(abs(i-lastweight) <0.1){
      stablecount++;
     } else{
      stablecount = 0;
     
     }
     lastweight = i;
      Serial.println(stablecount);
      Serial.println(checkint);
     if(stablecount >= checkint){
        
     if((i >= 11)&&(i <= 15)){
        if((hour(t) >= 5)&& (hour(t)<=11)){
          if( bfd1 == 0){
            for (int food = 0; food < 8; food++){

              s1.write(0);
              delay(1000);
              s1.write(60);
              delay(1000);
              s1.write(0);
            }
        }
        bfd1++;
        dfd1=0;
      }
     }
       if((i >= 11)&&(i <= 15)){
        if((hour(t) >= 12)&& (hour(t)<=15)){
          if( lfd1 == 0){
            for (int food = 0; food < 8; food++){

              s1.write(0);
              delay(1000);
              s1.write(60);
              delay(1000);
              s1.write(0);
            }
        }
        lfd1++;
        bfd1=0;
      }
     }

       if((i >= 11)&&(i <= 15)){
        if((hour(t) >= 17)&& (hour(t)<=22)){
          if( dfd1 == 0){
            for (int food = 0; food < 8; food++){

              s1.write(0);
              delay(1000);
              s1.write(60);
              delay(1000);
              s1.write(0);
            }
        }
        dfd1++;
        lfd1=0;
      }
     }







     }

    }
     
    
    
  }

  // receive command from serial terminal
  if (Serial.available() > 0) {
    char inByte = Serial.read();
    if (inByte == 't') LoadCell.tareNoDelay(); //tare
    else if (inByte == 'r') calibrate(); //calibrate
    else if (inByte == 'c') changeSavedCalFactor(); //edit calibration value manually
  }

  // check if last tare operation is complete
  if (LoadCell.getTareStatus() == true) {
    Serial.println("Tare complete");
  }

    // check for input to set the RTC, minimum length is 12, i.e. yy,m,d,h,m,s
    if (Serial.available() >= 12) {
        // note that the tmElements_t Year member is an offset from 1970,
        // but the RTC wants the last two digits of the calendar year.
        // use the convenience macros from the Time Library to do the conversions.
        int y = Serial.parseInt();
        if (y >= 100 && y < 1000)
            Serial << F("Error: Year must be two digits or four digits!") << endl;
        else {
            if (y >= 1000)
                tm.Year = CalendarYrToTm(y);
            else    // (y < 100)
                tm.Year = y2kYearToTm(y);
            tm.Month = Serial.parseInt();
            tm.Day = Serial.parseInt();
            tm.Hour = Serial.parseInt();
            tm.Minute = Serial.parseInt();
            tm.Second = Serial.parseInt();
            t = makeTime(tm);
            myRTC.set(t);   // use the time_t value to ensure correct weekday is set
            setTime(t);
            Serial << F("RTC set to: ");
            printDateTime(t);
            Serial << endl;
            // dump any extraneous input
            while (Serial.available() > 0) Serial.read();
        }
    }

    t = now();
    if (t != tLast) {
        tLast = t;
        printDateTime(t);
        if (second(t) == 0) {
            float c = myRTC.temperature() / 4.;
            float f = c * 9. / 5. + 32.;
            Serial << F("  ") << c << F(" C  ") << f << F(" F");
        }
        Serial << endl;
    }
     if((hour(t) == 1) &&(minute(t)==12)){
        s1.write(0);
        delay(1000);
        s1.write(180);
        delay(1000);
        s1.write(0);
      }
}

// print date and time to Serial
void printDateTime(time_t t)
{
    printDate(t);
    Serial << ' ';
    printTime(t);
}

// print time to Serial
void printTime(time_t t)
{
    printI00(hour(t), ':');
    printI00(minute(t), ':');
    printI00(second(t), ' ');
}

// print date to Serial
void printDate(time_t t)
{
    printI00(day(t), 0);
    Serial << monthShortStr(month(t)) << _DEC(year(t));
}

// Print an integer in "00" format (with leading zero),
// followed by a delimiter character to Serial.
// Input value assumed to be between 0 and 99.
void printI00(int val, char delim)
{
    if (val < 10) Serial << '0';
    Serial << _DEC(val);
    if (delim > 0) Serial << delim;
    return;
}
void calibrate() {
  Serial.println("***");
  Serial.println("Start calibration:");
  Serial.println("Place the load cell an a level stable surface.");
  Serial.println("Remove any load applied to the load cell.");
  Serial.println("Send 't' from serial monitor to set the tare offset.");

  boolean _resume = false;
  while (_resume == false) {
    LoadCell.update();
    if (Serial.available() > 0) {
      if (Serial.available() > 0) {
        char inByte = Serial.read();
        if (inByte == 't') LoadCell.tareNoDelay();
      }
    }
    if (LoadCell.getTareStatus() == true) {
      Serial.println("Tare complete");
      _resume = true;
    }
  }

  Serial.println("Now, place your known mass on the loadcell.");
  Serial.println("Then send the weight of this mass (i.e. 100.0) from serial monitor.");

  float known_mass = 0;
  _resume = false;
  while (_resume == false) {
    LoadCell.update();
    if (Serial.available() > 0) {
      known_mass = Serial.parseFloat();
      if (known_mass != 0) {
        Serial.print("Known mass is: ");
        Serial.println(known_mass);
        _resume = true;
      }
    }
  }

  LoadCell.refreshDataSet(); //refresh the dataset to be sure that the known mass is measured correct
  float newCalibrationValue = LoadCell.getNewCalibration(known_mass); //get the new calibration value

  Serial.print("New calibration value has been set to: ");
  Serial.print(newCalibrationValue);
  Serial.println(", use this as calibration value (calFactor) in your project sketch.");
  Serial.print("Save this value to EEPROM adress ");
  Serial.print(calVal_eepromAdress);
  Serial.println("? y/n");

  _resume = false;
  while (_resume == false) {
    if (Serial.available() > 0) {
      char inByte = Serial.read();
      if (inByte == 'y') {
#if defined(ESP8266)|| defined(ESP32)
        EEPROM.begin(512);
#endif
        EEPROM.put(calVal_eepromAdress, newCalibrationValue);
#if defined(ESP8266)|| defined(ESP32)
        EEPROM.commit();
#endif
        EEPROM.get(calVal_eepromAdress, newCalibrationValue);
        Serial.print("Value ");
        Serial.print(newCalibrationValue);
        Serial.print(" saved to EEPROM address: ");
        Serial.println(calVal_eepromAdress);
        _resume = true;

      }
      else if (inByte == 'n') {
        Serial.println("Value not saved to EEPROM");
        _resume = true;
      }
    }
  }

  Serial.println("End calibration");
  Serial.println("***");
  Serial.println("To re-calibrate, send 'r' from serial monitor.");
  Serial.println("For manual edit of the calibration value, send 'c' from serial monitor.");
  Serial.println("***");
}

void changeSavedCalFactor() {
  float oldCalibrationValue = LoadCell.getCalFactor();
  boolean _resume = false;
  Serial.println("***");
  Serial.print("Current value is: ");
  Serial.println(oldCalibrationValue);
  Serial.println("Now, send the new value from serial monitor, i.e. 696.0");
  float newCalibrationValue;
  while (_resume == false) {
    if (Serial.available() > 0) {
      newCalibrationValue = Serial.parseFloat();
      if (newCalibrationValue != 0) {
        Serial.print("New calibration value is: ");
        Serial.println(newCalibrationValue);
        LoadCell.setCalFactor(newCalibrationValue);
        _resume = true;
      }
    }
  }
  _resume = false;
  Serial.print("Save this value to EEPROM adress ");
  Serial.print(calVal_eepromAdress);
  Serial.println("? y/n");
  while (_resume == false) {
    if (Serial.available() > 0) {
      char inByte = Serial.read();
      if (inByte == 'y') {
#if defined(ESP8266)|| defined(ESP32)
        EEPROM.begin(512);
#endif
        EEPROM.put(calVal_eepromAdress, newCalibrationValue);
#if defined(ESP8266)|| defined(ESP32)
        EEPROM.commit();
#endif
        EEPROM.get(calVal_eepromAdress, newCalibrationValue);
        Serial.print("Value ");
        Serial.print(newCalibrationValue);
        Serial.print(" saved to EEPROM address: ");
        Serial.println(calVal_eepromAdress);
        _resume = true;
      }
      else if (inByte == 'n') {
        Serial.println("Value not saved to EEPROM");
        _resume = true;
      }
    }
  }
  Serial.println("End change calibration value");
  Serial.println("***");
}