#include <LiquidCrystal.h>
#include <LiquidCrystal.h>
#include <DFRobot_DHT11.h>

// Initialize LCD
const int  rs =4, en =5, d4 =6, d5 =7, d6 =8, d7=9;
LiquidCrystal lcd(4, 5, 6, 7, 8, 9);

// Define LDR and LED pin
int LEDV = 1;//RED
int LEDT = 2;//YELLOW
int dht11=A1;
const int Battery_voltage = A0;//

int fan_Ctrl = 26;//connect fan
int AC_POWER_F = 27;
int HIGH_DC = 28;
int CHARGER_FAIL = 29;

int fan_LED =13 ;//connect fan
int AC_POWER_LED = 10;
int HIGH_DC_LED = 11;
int CHARGER_LED= 12;

// Define threshold value
const int Threshold_V = 3 ; // declare in VOLTAGE
const int thermometerPin = A1;//represented by a potentiomete
int battery_voltage_raw = 0;//raw value measered in zero

void setup() {
  int Battery_Voltage = analogRead(Battery_voltage);//read themometer
  int mappedValeu = map(Battery_Voltage,0,1023,0,9);//EQUATE VOLTEGE TO POTENTIOMETER ADJUSTMENT
  // Define LDR and LED pin

int LEDT = 10;
int LEDV = 2;
// Define threshold value
const int Threshold_T = 813 ; // declare in maximum temperature(kelvins)

 const int Threshold_V = 2.5 ;// DECLCRE MIN VOLTAGE
  // Set up the LCD
  Serial.begin(9600);
  lcd.begin(20, 4);
  lcd.clear();

  // Set LED pin as output
  pinMode(A0, INPUT);
  pinMode(2, OUTPUT);//low charge
  pinMode(A1,INPUT);
   pinMode(3, OUTPUT);//high temprature
   pinMode(LEDT,OUTPUT);

//set alarm inputs
pinMode(fan_Ctrl,INPUT);
pinMode(AC_POWER_F,INPUT);
pinMode(HIGH_DC,INPUT);
pinMode(CHARGER_FAIL,INPUT);

//set alarm LED outputs
pinMode(fan_LED,OUTPUT);
pinMode(AC_POWER_LED, OUTPUT);
pinMode(HIGH_DC_LED,OUTPUT);
pinMode(CHARGER_LED,OUTPUT);

dht11.begin();
float tempC = dht11.readTemperature();  
// Print initial messages on LCd

    int tempValue = analogRead(thermometerPin);//read themometer
    int mappedtemp = map(tempValue,0,1023,0,900);
  // Set up the LCD
  Serial.begin(9600);
  lcd.begin(20, 4);
  lcd.clear();

  // Set LED pin as output
  pinMode(A1, INPUT);
  pinMode(10, OUTPUT);
  pinMode(A0, INPUT);

  // Print initial messages on LCD
  lcd.setCursor(0, 0);
  lcd.print("Battery_Volt:");
  lcd.setCursor(0, 1);
  lcd.print("");
    lcd.setCursor(0, 1);
  lcd.print("Threshold(c): 813");
  lcd.setCursor(0, 2);
  lcd.print("ThermoMeter(c): "); //set value read by thermometr @ line 3
  lcd.setCursor(8,3);

  lcd.setCursor(0, 3);
  lcd.print("SYSTEM:");//set stystem reort @ line 4


}

void loop() {
  // Read the LDR value
  int Battery_voltage_raw = 0;//raw value measered in zero
   int  Battery_Voltage= analogRead(A0);//read themometer
 int Battery = analogRead(Battery_Voltage);
 Battery_voltage_raw = analogRead(Battery_voltage);
 Battery = (Battery_voltage_raw *11)/1023;
 // Define threshold value
const int Threshold_T = 813 ; // declare in maximum temperature(kelvins)

 const int Threshold_V = 3 ;// DECLCRE MIN VOLTAGE
  int mappedValue = map(Battery_Voltage,0,1023,0,9);//EQUATE VOLTEGE TO POTENTIOMETER ADJUSTMENT

 lcd.setCursor(15,0);
 lcd.print(mappedValue);
  // Display VOLTAGE value on LCD
 
 lcd.setCursor(0,17);
 lcd.print(A0);
  // Display LDR value on LCD
 

  // Check if battery voltage falls below threshold
  if (Battery_Voltage > Threshold_V) {
    // Turn on LED
    digitalWrite(LEDV, HIGH);
    lcd.setCursor(0, 3);
    lcd.print("Battery_LOW");

  } else {
    // Turn off LED
    
    digitalWrite(LEDV, LOW);

  }

  delay(500); // Adjust delay time as needed
//read the temparature in kelvins

 // Read the LDR value
  
int temp = DHT.read11(outpin);

float t = DHT.temperature;

lcd.setCursor(2,14);
lcd.print(t);
lcd.print("c |");
serial.pritn((T*9.0)/5.0+32.0);

 

  // Check if tempurature  is above threshold
  if (tempValue > Threshold_T) {
    // Turn on LED
    digitalWrite(LEDT, HIGH);
    digitalWrite(fan_Ctrl,HIGH);
    lcd.setCursor(7, 4);
    lcd.print("OVERHEAT");

  } else {
    // Turn off LED
    
    digitalWrite(LEDT, LOW);

  }
  //TRIGGERING AC ALARM WITH A DIP SWITCH
  digitalWrite(10, LOW);
  digitalRead(AC_POWER_F);
  digitalRead(fan_Ctrl);
  digitalRead(HIGH_DC);
  digitalRead(CHARGER_FAIL);

//triggering ac power failure
if (digitalRead(AC_POWER_F) == HIGH){
digitalWrite(AC_POWER_LED, HIGH);
lcd.setCursor(7, 4);
lcd.print("AC POWER FAIL");}
else {
digitalWrite(AC_POWER_LED,LOW);
}
//triggering fan led alarm with a dip switch
if (digitalRead(fan_Ctrl) == HIGH){
digitalWrite(fan_LED, HIGH);
lcd.setCursor(7,4);
lcd.print("fan");}
else{ 
digitalWrite(fan_LED,LOW);}

//TRIGGERING HIGH DC POWER ALARM
if (digitalRead(HIGH_DC) == HIGH){
digitalWrite(HIGH_DC_LED, HIGH);
lcd.setCursor(7, 4);
lcd.print("HIGH.DC");}
else {
digitalWrite(HIGH_DC_LED,LOW);
}
//triggering charger fail
if ( digitalRead(CHARGER_FAIL) == HIGH){
digitalWrite(CHARGER_LED, HIGH);
lcd.setCursor(7, 4);
lcd.print("charger_f");}
else{ 
digitalWrite(CHARGER_LED,LOW);
}
}
//LINK REFERENCE https://www.youtube.com/watch?v=gNEYa1qNdX8