/**
   HC-SR04 Distance Sensor Example
   https://wokwi.com/arduino/projects/304444938977804866
*/

#define PIN_TRIG 3
#define PIN_ECHO 2

void setup() {
  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
}

void loop() {
  // Start a new measurement:
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Read the result:
  float duration = pulseIn(PIN_ECHO, HIGH);
  Serial.print("Distance is: ");
  Serial.print(duration / 58);
  Serial.println("  cm");
  Serial.print("Distance is: ");
  Serial.print((duration / 58)/100);
  Serial.println("  m");
  if((duration / 58)/100 > 0.02 && (duration / 58)/100 <0.1){
    Serial.println("Move away");
  }
  else if((duration / 58)/100 > 0.1 && (duration / 58)/100 < 0.3){
    Serial.println("It's good");
  }
  else if((duration / 58)/100 > 0.3){
  Serial.println("Too far");
  }

  delay(1000);
}