#include <LiquidCrystal.h>

// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int distanceThreshold = 0;

int cm = 0;

int inches = 0;

long readUltrasonicDistance(int triggerPin, int echoPin)
{
  pinMode(triggerPin, OUTPUT);  // Clear the trigger
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  // Sets the trigger pin to HIGH state for 10 microseconds
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  pinMode(echoPin, INPUT);
  // Reads the echo pin, and returns the sound wave travel time in microseconds
  return pulseIn(echoPin, HIGH);
}

void setup() {
  /*lcd.begin(16, 2);
  lcd.print("Time to wash");
  lcd.setCursor(0, 1);
  lcd.print("your clothes");*/





}

void loop() {
  // set threshold distance to activate LEDs
  distanceThreshold = 350;
  // measure the ping time in cm
  cm = 0.01723 * readUltrasonicDistance(7, 6);
  // convert to inches by dividing by 2.54
  inches = (cm / 2.54);
  Serial.print(cm);
  Serial.print("cm, ");
  Serial.print(inches);
  Serial.println("in");
  if (cm > distanceThreshold) {
  lcd.begin(16, 2);
  lcd.print("Time to wash");
  lcd.setCursor(0, 1);
  lcd.print("your clothes");
  }
  if (cm <= distanceThreshold && cm > distanceThreshold - 100) {
  lcd.begin(16, 2);
  lcd.print("Time to wash");
  lcd.setCursor(0, 1);
  lcd.print("your clothes");
  }
  if (cm <= distanceThreshold - 100 && cm > distanceThreshold - 250) {
  lcd.begin(16, 2);
  lcd.print("No need to wash");
  lcd.setCursor(0, 1);
  lcd.print("your clothes");
  }
  if (cm <= distanceThreshold - 250 && cm > distanceThreshold - 350) {
  lcd.begin(16, 2);
  lcd.print("No need to wash");
  lcd.setCursor(0, 1);
  lcd.print("your clothes");
  }
  if (cm <= distanceThreshold - 350) {
  lcd.begin(16, 2);
  lcd.print("No need to wash");
  lcd.setCursor(0, 1);
  lcd.print("your clothes");
}
  delay(1000);
}