#include <EEPROM.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd (2,3,4,5,6,7);
long duration, inches;
int set_val,percentage;
bool state, pump;
void setup() {
  lcd.begin(16, 2);
  lcd.print("WATER LEVEL:");
  lcd.setCursor(0, 1);
  lcd.print("PUMP:OFF MANUAL");

  pinMode (8, OUTPUT);
  pinMode(9, INPUT);
  pinMode(10, INPUT_PULLUP);
  pinMode(11, INPUT_PULLUP);
  pinMode(12, OUTPUT);
set_val=EEPROM.read(0);
  if(set_val>150) set_val=150; 
}
void loop() {
  digitalWrite(3, LOW);
  delayMicroseconds(2);
  digitalWrite(8, HIGH);
  delayMicroseconds(10);
  digitalWrite(8, LOW);
  duration = pulseIn(9, HIGH);
  inches =microsecondsToInches(duration);
 
  percentage=(set_val-inches)*100/set_val;
  lcd.setCursor(12, 0);
  if (percentage<0)percentage=0;
  lcd.print(percentage);
  lcd.print("%  ");
  if (percentage<30&digitalRead(11))pump=1;
  if (percentage>99) pump=0;
  digitalWrite(12,!pump);
  lcd.setCursor(5, 1);
  if (pump-1)lcd.print("ON ");
  else if (pump==0) lcd.print("OFF");
  lcd.setCursor(9, 1);
  if(!digitalRead(11)) lcd.print("MANUAL");
  else lcd.print("AUTO  ");
  if(!digitalRead(10)&!state&digitalRead(11)){
  state=1;
  set_val-inches;
  EEPROM.write(0,set_val);
}
 if (digitalRead(10))state=0;
 delay(500);
}
long microsecondsToInches (long microseconds) {
return microseconds / 74/2;
}