#include <LiquidCrystal_I2C.h>

#define I2C_ADD 0X27
#define LCD_COL 16
#define LCD_ROW 2
#define RED 18
#define count 10
#define POT 34
#define TRIG 5
#define ECHO 16
#define RED 13
#define YELLOW 4
#define GREEN 16


LiquidCrystal_I2C lcd(I2C_ADD,LCD_COL,LCD_ROW);
const int pin[] ={18,19,17,14,23,32,33,27,26,25};

void setup() {
  // put your setup code here, to run once:
  // Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.print("Water measure!!");
  int i=0;
  while(i<count){
    pinMode(pin[i],OUTPUT);
    i++;
  }
  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
  pinMode(RED, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(GREEN, OUTPUT);
  
}

void loop() {
  
  int dis = readDis();
  disp(dis);
  int level = map(dis,0,400,0,count);
  // Serial.println(level);
  int i =0;
  while(i<count){
    if(i<level){
      digitalWrite(pin[i],HIGH);
    }else{
      digitalWrite(pin[i],LOW);
    }
    i++;
  }
}

int readDis(){
  digitalWrite(TRIG, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG,HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG,LOW);
  int duration = pulseIn(ECHO,HIGH);
  int distance = duration *0.034 / 2;
  // Serial.println(distance);
  return distance;
}

void disp(int dist){
  // lcd.setCursor(0,0);
  // lcd.print("Water distance:");
  // lcd.setCursor(0,1);
  // lcd.print(String(dist) + " cm");
  if(dist>350){
    highLevel();
  }else if(dist<350 && dist>150){
    midLevel();
  }else{
    lowLevel();
  }
}

void lowLevel(){
  lcd.setCursor(0,0);
  lcd.print("Low Level       ");
  lcd.setCursor(0,1);
  lcd.print("Less than 10%    ");
  digitalWrite(RED, HIGH);
  digitalWrite(YELLOW, LOW);
  digitalWrite(GREEN, LOW);
}
void midLevel(){
  lcd.setCursor(0,0);
  lcd.print("Mid Level     ");
  lcd.setCursor(0,1);
  lcd.print("It's about 50%     ");
  digitalWrite(RED, LOW);
  digitalWrite(YELLOW, HIGH);
  digitalWrite(GREEN, LOW);
}
void highLevel(){
  lcd.setCursor(0,0);
  lcd.print("High Level     ");
  lcd.setCursor(0,1);
  lcd.print("Almost Full     ");
  digitalWrite(RED, LOW);
  digitalWrite(YELLOW, LOW);
  digitalWrite(GREEN, HIGH);
}