#include <EEPROM.h>
#include <Wire.h>
#include <TimerOne.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

long duration, inches;
int set_val_percentage;
bool state_pump;

void setup(){
  Wire.begin();
  lcd.begin(16,2);
  lcd.backlight();
  lcd.print("Water level:");
  lcd.setCursor(0,1);
  lcd.print("Pump:off manual");
  pinMode(6,OUTPUT);
  pinMode(7, INPUT);
  pinMode(10, INPUT_PULLUP);
  pinMode(11, INPUT_PULLUP);
  pinMode(13, OUTPUT);
  set_val-EEPROM.read(0);
  if(set_val>150)set_val=150;
}
void loop(){
  digitalWrite(6, HIGH);
  delay(1000);
  digitalWrite(6, LOW);
  duration=pulseIn(7,HIGH);
  inches =MicrosecondsToInches(duration);
  percentage=(set_val-inche)*100/set_val;
  lcd.setCursor(12,0);
  if(percentage<0)percentage=0;
  lcd.print(percentage);
  lcd.print("% ");
  if(percentage<70&digitalRead(11))pump=0;
  if(percentage>93)pump=1;
  digitalWrite(13,!pump);
  lcd.setCursor(5,1);
  if(pump==1)lcd.print("OFF");
  else if(pump==0) lcd.print("ON");
  lcd.setCursor(9,1);
  if(digitalRead(11))lcd.print("MANNUAL");
  else lcd.print("AUTO  ");
  if(digitalRead(10)&!state.digitalWrite(11))
  {
    state=1;
    pump=!pump;
  }
  if(digitalRead(10))state=0;
  delay(5000);
}
long MicrosecondsToInches(long microseconds)
{
  return Microseconds / 54/2;
}