#include <VARSTEP_ultrasonic.h>
#include <LiquidCrystal_I2C.h>

class PIRSensor
{
  public:
    int outputPin;

    PIRSensor(int outputPin)
    {
      outputPin = outputPin;
      pinMode(outputPin, INPUT);
    }

    //--- millis() time when we last triggered, 0 means none
    int getStatus() {
      return digitalRead(outputPin);
    }
};

#define PIR_SENSOR_PIN 4
#define DISTANCE_SENSOR_ECHO_PIN 2
#define DISTANCE_SENSOR_TRIG_PIN 3
#define LCD_ADDR 0x27
#define LCD_COLUMN_COUNT 20
#define LCD_ROW_COUNT 4
#define SERIAL_SPEED 9600

PIRSensor pirSensor(PIR_SENSOR_PIN);
VARSTEP_ultrasonic distanceSensor(DISTANCE_SENSOR_TRIG_PIN, DISTANCE_SENSOR_ECHO_PIN);
LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLUMN_COUNT, LCD_ROW_COUNT);

void setup()
{
  Serial.begin(SERIAL_SPEED);
  lcd.init();
  lcd.backlight();
}

void loop() {
  Serial.println(pirSensor.getStatus());
}

double distance_cm, distance_m;
void loop3() {
  distance_cm = distanceSensor.distance_cm();

  if (distance_cm == -1.0) {
    Serial.println("No distance detected");
  } else {
    Serial.print("Distance: ");
    Serial.print(distance_cm);
    Serial.print("cm | ");
    Serial.print(distance_m);
    Serial.println("m");
  }

  delay(100); // We recommend 100ms minimum delay for good accuracy.
}

// void loop2()
// {
//   cm = 0.0344 / 2 * readUltrasonicDistance(3, 2);
//   inches = (cm / 2.54);
//   /*
//     Serial.print("Inches ");
//     Serial.print(inches, 1);
//     Serial.print("\t");
//     Serial.print("cm ");
//     Serial.println(cm, 1);
//   */
//   lcd.setCursor(0, 0);
//   lcd.print("Inches");
//   lcd.setCursor(4, 0);
//   lcd.setCursor(12, 0);
//   lcd.print("cm");
//   lcd.setCursor(1, 1);
//   lcd.print(inches, 1);
//   lcd.setCursor(11, 1);
//   lcd.print(cm, 1);
//   lcd.setCursor(14, 1);
//   delay(2000);
//   lcd.clear();
// }