/*
    NEVEDIT 15 Dec 2023, 23:47
    1. Added max and min as requested
    2. added header to csv file
    3. writing max and min to:
      a. csv
      b. serial
      c. lcd

    4. wokwi simulation link:
      https://wokwi.com/projects/384217239675179009


*/


#include <Wire.h>
#include <TimeLib.h>
#include <RTClib.h> // for the RTC
#include <SimpleDHT.h>
#include <SD.h>
#include <SPI.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display

#include <SoftwareSerial.h>
SoftwareSerial sim800l(9, 10); // RX,TX for Arduino and for the module it's TXD RXD, they should be inverted


// RTC
//RTC_DS3231 rtc;
RTC_DS1307 rtc;   //for wokwi simulation

//sdcard
File myFile;
int pinCS = 8; // Pin 10 on Arduino Uno

unsigned long msecLst;
int count;
//int timeValue = (1000*60*60*24);
#define myTime 300000// sending text message time delay 240000
int pinDHT11 = 2;
SimpleDHT11 dht11(pinDHT11);
byte temperature = 0;
byte maxTemperature, minTemperature;

byte humidity = 0;
byte maxHumidity, minHumidity;


//Photodiode
int radiationPin = A1;
float radiationValue = 0.0;
float maximumRadiation = 0.0;
float minRadiation = 0.0;
float radiation = 0.0;


#define echoPin 3 // attach pin1 D3 Arduino to pin Echo of HC-SR04
#define trigPin 4  //attach pin D4 Arduino to pin Trig of HC-SR04
// defines variables
long duration; // variable for the duration of sound wave travel
int distance; // variable for the distance measurement
int newDistance;
int distanceprim;
float maxDepth =  150;
float volume;
float rainfall;
float maxRainfall;
float minRainfall;
float Height;
//float m = 0.1726;
float m = 0.17;
float c = -12;
float radiation_percentage;

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT
  pinMode(echoPin, INPUT); // Sets the echoPin as an INPUT
  pinMode(radiationPin, INPUT);

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

  lcd.print("Initializing...");
  delay(2000);
  lcd.clear();


  // setup for the RTC
  //while (!Serial); // for Leonardo/Micro/Zero
   if (! rtc.begin()) {
     Serial.println("Couldn't find RTC");
//     //lcd.print("no RTC found"); // <-- not enough memory. 
//     //while (1);
   }
   else {
//     // following line sets the RTC to the date & time this sketch was compiled
     rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
     
     DateTime now = rtc.now();
     Serial.println(now.minute());
    // char buf[20];
    // sprintf(buf, "%02d:%02d:%02d %02d/%02d/%02d", now.hour(), now.minute(), now.second(), now.day(), now.month(), now.year());
    // Serial.println(buf);

//  // }
// //  if (! rtc.isrunning()) {
//     //Serial.println("RTC is NOT running!");
   }

  // SD Card Initialization
  if (SD.begin())
  {
    Serial.println("SD card is ready to use.");

    //Create file
    myFile = SD.open("file.csv", FILE_WRITE);

    // print the header for the csv file:
    //"Y/M/D H:mm:ss,rainfall, maxRainfall, minRainfall, humidity, maxHumidity, minHumidity, temperature, MaxTemperature, minTemperature, radiation, maxRadiation, minRadiation" 
    if (myFile){
      myFile.println("Datetime,rainfall, maxRainfall, minRainfall, humidity, maxHumidity, minHumidity, temperature, MaxTemperature, minTemperature, radiation, maxRadiation, minRadiation");
      myFile.close();
      Serial.println("File Successfully Created");
    }
  }
  else
  {
    Serial.println("SD card initialization failed");
    return;
  }
}

//void(*resetFunc)(void) = 0;


void loop() {
  DateTime now = rtc.now();
  DisplayDateAndTime();
  getDHT11();
  getWaterLevel();
  solarRadiation();
  WritingToFile();
  lcdDisplay();



  unsigned long msec = millis();
  if ((msec - msecLst) > myTime) {

    Serial.print("COUNT VALUE: ");
    Serial.println(msecLst);
    SendSMS();
    msecLst = msec;
  }

  //
  //  delay(500);


}

/////////////////////////////////////////////////DHT CODE//////////////////////////////////////////////////////////////////
void getDHT11() {

  // read without samples.
  int err = SimpleDHTErrSuccess;
  if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
    //    Serial.print("Read DHT failed, err="); Serial.print(SimpleDHTErrCode(err));
    //    Serial.print(","); Serial.println(SimpleDHTErrDuration(err)); delay(1000);
    return;
  }
  else {
    //also get max and min values
    if (humidity > maxHumidity) maxHumidity = humidity;
    if (minHumidity > humidity) minHumidity = humidity;

    if (temperature > maxTemperature) maxTemperature = temperature;
    if (minTemperature > temperature) minTemperature = temperature;
  }

}
/////////////////////////////////////////////////DHT CODE//////////////////////////////////////////////////////////////////

void getWaterLevel() {
  // Clears the trigPin condition
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin HIGH (ACTIVE) for 10 microseconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  // Calculating the distance
  distance = duration * 0.034 / 2; // Speed of sound wave divided by 2 (go and back)
  // Displays the distance on the Serial Monitor


 distance = distance  * 10;
  //Serial.print("Distance");   //from sensor to boundary
  //Serial.println(distance);
  //Serial.print(distance);
  if (distance > maxDepth) {
    maxDepth = distance ;
  }
  newDistance = maxDepth - distance ;//height of water
  Height = (newDistance * m) + c; // where y = mx + c
  // volume = 26000.2 * Height;
  rainfall = distance;
 rainfall = map(rainfall, 0 , maxDepth , maxDepth , 0);

  if (rainfall < 0.0) {
    rainfall = 0;
  }
  if (rainfall > 130) {
    rainfall = 130;
//    resetFunc();
  }
  //get maximum and minimum rainfall
  if (rainfall > maxRainfall) maxRainfall = rainfall;
  if (minRainfall > rainfall) minRainfall = rainfall; 

}
//////////////////////////////////////////////////////////////////////////////////////////////////////////268.802521423

void solarRadiation() {
  radiationValue = analogRead(radiationPin);
radiationValue = (radiationValue / 1024.0) * 5.0;
 radiation = ((radiationValue * 85.07 )+ 79.54);

 //get max and min radiation
  if (radiation > maximumRadiation)  maximumRadiation = radiation;
  if (minRadiation > radiation) minRadiation = radiation;
 // Serial.println("Radiation:  ");
 // Serial.println(radiation);
 // Serial.print("w/msq");
  delay(1000);


  Serial.println();
  
  

}


void DisplayDateAndTime() {
  DateTime now = rtc.now();
}

void WritingToFile() {
  getDHT11();
  //  getWaterLevel();

  DateTime now = rtc.now();
  // Create/Open file
  myFile = SD.open("file.csv", FILE_WRITE);

  //need to print the header for the csv file:
  //"Y/M/D H:mm:ss,rainfall, maxRainfall, minRainfall, humidity, maxHumidity, minHumidity, temperature, MaxTemperature, minTemperature, radiation, maxRadiation, minRadiation" 

  // if the file opened okay, write to it:
  if (myFile) {
    getWaterLevel();


    // Write to file
    DateTime now = rtc.now();
    myFile.print(now.year(), DEC);
    myFile.print('/');
    myFile.print(now.month(), DEC);
    myFile.print('/');
    myFile.print(now.day(), DEC);
    myFile.print("   ");
    myFile.print(now.hour(), DEC);
    myFile.print(':');
    myFile.print(now.minute(), DEC);
    myFile.print(':');
    myFile.print(now.second(), DEC);
    myFile.print(",");



    myFile.print(rainfall);
    myFile.print(",");
    myFile.print(maxRainfall);
    myFile.print(",");
    myFile.print(minRainfall);
    myFile.print(",");
    myFile.print(humidity);
    myFile.print(",");
    myFile.print(maxHumidity);
    myFile.print(",");
    myFile.print(minHumidity);
    myFile.print(",");
    myFile.print(temperature);
    myFile.print(",");
    myFile.print(maxTemperature);
    myFile.print(",");
    myFile.print(minTemperature);
    myFile.print(",");
    myFile.print(radiation);
    myFile.print(",");
    myFile.print(maximumRadiation);
    myFile.print(",");
    myFile.print(minRadiation);
    myFile.println();
    myFile.close(); // close the file


    //    DateTime now = rtc.now();
    Serial.print(now.year(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.day(), DEC);
    Serial.print("  ");
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);

    //Serial.print("   Distance: ");
    //  Serial.print(distance);
    Serial.print("   Rainfall: ");
    Serial.print(rainfall);
    Serial.print(" mm");
    Serial.print("   Max Rainfall: ");
    Serial.print(maxRainfall);
    Serial.print(" mm");
    Serial.print("   Min Rainfall: ");
    Serial.print(minRainfall);
    Serial.print(" mm");
    Serial.println();

    Serial.print("    Humidity: ");
    Serial.print(humidity);
    Serial.print(" %");
    Serial.print("    Max Humidity: ");
    Serial.print(maxHumidity);
    Serial.print(" %");
    Serial.print("    Min Humidity: ");
    Serial.print(minHumidity);
    Serial.print(" %");
    Serial.println();

    Serial.print("   Temperature: ");
    Serial.print(temperature);
    Serial.print(" Degrees C");
    Serial.print("   Max Temperature: ");
    Serial.print(maxTemperature);
    Serial.print(" Degrees C");
    Serial.print("   Min Temperature: ");
    Serial.print(minTemperature);
    Serial.print(" Degrees C");
    Serial.println();


    Serial.print("   Radiation: ");
    Serial.print(radiation);
    Serial.print(" Watt/msq");
    Serial.println();
    Serial.print("   Max Radiation: ");
    Serial.print(maximumRadiation);
    Serial.print(" Watt/msq");
    Serial.println();
    Serial.print("   Min Radiation: ");
    Serial.print(minRadiation);
    Serial.print(" Watt/msq");
    Serial.println();


    delay(1000);
  }
  //   if the file didn't open, print an error:
  else {

    Serial.println("error opening file.csv");
  }
}


void SendSMS()
{
  getDHT11();
  sim800l.begin(9600);   //Module baude rate, this is on max, it depends on the version

  Serial.println("Sending SMS...");               //Show this message on serial monitor
  sim800l.print("AT+CMGF=1\r");                   //Set the module to SMS mode
  delay(100);
  sim800l.print("AT+CMGS=\"+263776384952\"\r");  //Your phone number don't forget to include your country code, example +263784430024
  delay(500);
  sim800l.println("Weather Conditions:");//This is the text to send to the phone number, don't make it too long or you have to modify the SoftwareSerial buffer
  DateTime now = rtc.now();


  sim800l.print(now.year(), DEC);
  sim800l.print('/');
  sim800l.print(now.month(), DEC);
  sim800l.print('/');
  sim800l.print(now.day(), DEC);
  sim800l.print("   ");
  sim800l.print(now.hour(), DEC);
  sim800l.print(':');
  sim800l.print(now.minute(), DEC);
  sim800l.print(':');
  //sim800l.print(now.second(), DEC);
  sim800l.println("  ");



  sim800l.print("Temperature: ");
  sim800l.print(temperature);
  sim800l.println(" Degrees C");

  sim800l.print("Humidity: ");
  sim800l.print(humidity);
  sim800l.println(" %");
  sim800l.print("");
  sim800l.print("Rainfall: ");
  sim800l.print(rainfall);
  sim800l.println(" mm");
  sim800l.print(" ");
  sim800l.print("Radiation: ");
  sim800l.print(radiation);
  sim800l.println(" Watt/msq");
  sim800l.print(" ");
   
  sim800l.print((char)26);// (required according to the datasheet)
  delay(500);
  sim800l.println();
  Serial.println("Text Sent.");
  delay(500);
}


void lcdDisplay() {
  getDHT11();
  getWaterLevel();
  solarRadiation();

  lcd.clear();
  
  lcd.setCursor(0, 0);
  lcd.print("Temp:");
  lcd.setCursor(10, 0);
  lcd.print(temperature);
  lcd.print((char)223);   //degree symbol
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Max Temp:");
  lcd.setCursor(10, 1);
  lcd.print(maxTemperature);
  lcd.print((char)223);   //degree symbol
  lcd.print("C");

  delay(1000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Humidity:");
  lcd.setCursor(10, 0);
  lcd.print(humidity);
  lcd.print(" %");
  lcd.setCursor(0, 1);
  lcd.print("Max:");
  lcd.setCursor(10, 1);
  lcd.print(maxHumidity);
  lcd.print(" %");


  delay(1000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Rainfall:");
  lcd.setCursor(10, 0);
  lcd.print(rainfall);
  lcd.print("mm");
  lcd.setCursor(0, 1);
  lcd.print("Max:");
  lcd.setCursor(10, 1);
  lcd.print(maxRainfall);
  lcd.print("mm");

  delay(1000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Radiation:");
  lcd.setCursor(10, 0);
  lcd.print (radiation);
  lcd.print(" W/m2");
  lcd.setCursor(0, 1);
  lcd.print("Max:");
  lcd.setCursor(10, 1);
  lcd.print (maximumRadiation);
  lcd.print(" W/m2");

  delay(2000);
}