#include <LiquidCrystal.h>

// Custom characters
byte degreeSymbol[8] = {
  B01100,
  B10010,
  B01100,
  B00000,
  B00000,
  B00000,
  B00000,
  B00000
};

byte clockSymbol[8] = {
  B00000,
  B01110,
  B10101,
  B10001,
  B10101,
  B01110,
  B00000,
  B00000
};
#include <OneWire.h>
#include <DallasTemperature.h>

OneWire oneWire(10);
DallasTemperature sensor(&oneWire);

// DS1307 I2C address
#define DS1307_ADDRESS 0x68

// Pins for DS1307 (I2C)
#define SDA_PIN A4
#define SCL_PIN A5



// Pins for RGB LED
int RED_PIN= 11;
int GREEN_PIN= 10;
int BLUE_PIN = 9;

// Pins for LCD 1602
#define RS 8
#define E 13
#define D4 12
#define D5 2
#define D6 4
#define D7 7

LiquidCrystal lcd(RS, E, D4, D5, D6, D7);

void setup() {
  pinMode(SDA_PIN, INPUT_PULLUP);
  pinMode(SCL_PIN, OUTPUT);

  sensor.begin();

  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);

  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Weather Station");

  // Create custom characters
  lcd.createChar(0, degreeSymbol);
  lcd.createChar(1, clockSymbol);
}

byte bcdToDec(byte bcd) {
  return (bcd >> 4) * 10 + (bcd & 0x0F);
}

byte decToBcd(byte dec) {
  return (dec / 10 << 4) + dec % 10;
}

void i2cStart() {
  pinMode(SDA_PIN, OUTPUT);
  digitalWrite(SDA_PIN, HIGH);
  digitalWrite(SCL_PIN, HIGH);
  digitalWrite(SDA_PIN, LOW);
  digitalWrite(SCL_PIN, LOW);
}

void i2cStop() {
  pinMode(SDA_PIN, OUTPUT);
  digitalWrite(SDA_PIN, LOW);
  digitalWrite(SCL_PIN, HIGH);
  digitalWrite(SDA_PIN, HIGH);
}

void i2cWriteByte(byte data) {
  pinMode(SDA_PIN, OUTPUT);

  for (byte i = 0; i < 8; i++) {
    digitalWrite(SDA_PIN, data & 0x80);
    data <<= 1;
    digitalWrite(SCL_PIN, HIGH);
    digitalWrite(SCL_PIN, LOW);
  }

  pinMode(SDA_PIN, INPUT);
  digitalWrite(SCL_PIN, HIGH);
  digitalWrite(SCL_PIN, LOW);
}

byte i2cReadByte(bool ack) {
  pinMode(SDA_PIN, INPUT);
  byte data = 0;

  for (byte i = 0; i < 8; i++) {
    data <<= 1;
    digitalWrite(SCL_PIN, HIGH);
    if (digitalRead(SDA_PIN)) {
      data |= 1;
    }
    digitalWrite(SCL_PIN, LOW);
  }

  pinMode(SDA_PIN, OUTPUT);
  digitalWrite(SDA_PIN, !ack);
  digitalWrite(SCL_PIN, HIGH);
  digitalWrite(SCL_PIN, LOW);

  return data;
}

void readDS1307Time(byte *hour, byte *minute, byte *second) {
  i2cStart();
  i2cWriteByte((DS1307_ADDRESS << 1) | 0); // Write address
  i2cWriteByte(0); // Register address (0x00 for seconds)
  i2cStop();

  i2cStart();
  i2cWriteByte((DS1307_ADDRESS << 1) | 1); // Read address
  *second = bcdToDec(i2cReadByte(true));
  *minute = bcdToDec(i2cReadByte(true));
  *hour = bcdToDec(i2cReadByte(true)); // Change this line, set true instead of false
  i2cReadByte(false); // Add this line, read and discard the "day of week" byte
  i2cStop();
}

void loop() {
  byte hour, minute, second;
  readDS1307Time(&hour, &minute, &second);

  sensor.requestTemperatures();
float temperature = sensor.getTempCByIndex(0);

  // Adjust the time to GMT+8 timezone
  int adjustedHour = hour + 8;
  if (adjustedHour >= 24) {
    adjustedHour -= 24;
  }

  // Display the temperature on the LCD
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature, 1); // Add 1 to display temperature with one decimal place
  lcd.write(byte(0)); // Degree symbol
  lcd.print("C  ");

  // Display the adjusted time on the LCD
  lcd.setCursor(9, 1); // Change this line to set the cursor position to 9
  lcd.write(byte(1)); // Clock symbol
  lcd.print(" ");
  if (adjustedHour < 10) {
    lcd.print("0");
  }
  lcd.print(adjustedHour, DEC);
  lcd.print(':');
  if (minute < 10) {
    lcd.print("0");
  }
  lcd.print(minute, DEC);
  lcd.print(':');
  if (second < 10) {
    lcd.print("0");
  }
  lcd.print(second, DEC);
  analogWrite(GREEN_PIN, 0);
    analogWrite(BLUE_PIN, 0);
    analogWrite(RED_PIN,0);
  if (temperature > 40) {
    analogWrite(RED_PIN, 255);
   // Red
  } else if (temperature < 20) {
  
    analogWrite(BLUE_PIN, 255); // Blue
  } else {
    analogWrite(GREEN_PIN, 255);
  }

  delay(1000);
}