#include <EEPROM.h>

#include <Wire.h>
#include <LiquidCrystal_I2C.h>


LiquidCrystal_I2C lcd(0x27, 16, 2); // initialize a 

 
int set_val, percentage1,percentage2;
bool state,gov_pump,ele_pump;
const int t1 = 2;
const int e1 = 3;
const int t2 = 4;
const int e2 = 5;
int l1 = 6;
int l2 = 7;
int distance,duration;

void setup() {
  
  lcd.begin(16, 2); 
  lcd.setCursor(0, 0);
  lcd.print("WATER LEVEL:");
  lcd.setCursor(0, 1); 
  lcd.print("PUMP:OFF");// initialize to pump off
  
  pinMode(t1, OUTPUT);// set pin 2 to output tank1
  pinMode(e1, INPUT);// set pin 3 to input tank 1
  pinMode(t2,OUTPUT);// set pin 3 to output tank 2
  pinMode(e2,INPUT);// set pin 3 to input tank 2
  pinMode(l1, OUTPUT);
  pinMode(l2, OUTPUT);
  
  set_val=400;
}
void loop() {
  percentage1 = 0;
  percentage2 = 0;

  digitalWrite(t1, LOW);
  delayMicroseconds(2);
  digitalWrite(t1, HIGH);
  delayMicroseconds(10);
  digitalWrite(t1, LOW);

  duration = pulseIn(e1, HIGH,20000);
  distance = duration * 0.034 / 2;
  percentage1 = (1 - ((float)distance / set_val)) * 100;
   
  digitalWrite(t2, LOW);
  delayMicroseconds(2);
  digitalWrite(t2, HIGH);
  delayMicroseconds(10);
  digitalWrite(t2, LOW);
  
  duration = pulseIn(e2, HIGH,20000);
  distance = duration * 0.034 / 2;
  percentage2 = (1 - ((float)distance / set_val)) * 100;
  
  if(percentage1<0)percentage1=false;
  if(percentage2<0)percentage2=false;

  if(percentage1 < 95){
    gov_pump = true;
    digitalWrite(l1, HIGH);
  }
  else{
    gov_pump = false;
    digitalWrite(l1, LOW);
  }

  if(percentage2 < 30 && ((percentage1) > 30 && (percentage1) < 100 ) || (percentage1 >= 95 && percentage2 < 95))
  {
    ele_pump = true;  
    digitalWrite(l2, HIGH);
  }
  if(percentage2 > 95 || percentage1 < 30) 
  {
    ele_pump = false;
    digitalWrite(l2, LOW);
  }
 
  lcd.setCursor(12, 0); 
  if(percentage1<0)percentage1=0;
  lcd.print(percentage2);
  lcd.print("%   ");
  
  if(percentage2>95)ele_pump=false;
  lcd.setCursor(5, 1);
  if(ele_pump==1)lcd.print("ON ");
  else if(ele_pump==0) lcd.print("OFF");
   
  lcd.setCursor(9, 1);
  delay(100);
}
long microsecondsToInches(long microseconds) {
   return microseconds / 74 / 2;
}