This is the mini-project simulating runway system. In real life scenarios, these really play quintessential role during landing and take-off the plane. Leveraging upon DHT sensor, Ultrasonic sensor and Bluetooth module, this project got its significant shape and effectiveness. A bijou implementation of IoT.

Some paramount components we leveraged upon,

• Arduino UNO R3
• LCD Screen 16x2
• BlueTooth
• Temperature and Humidity Sensor - DHT
• UltraSonic Sensor
• LED Bulb
• Buzzer

• Establish the circuit with above enlisted components.
• Upload the RWS.ino code in the Board.
• Test its functionality by moving any object (in our case it is a plane) near UltraSonic sensor.
• Here, the UltraSonic is deployed to measure the distance between plane and the ground, distance numerals are displayed on the screen in rounded figures namely, 50, 40, 30, 20, Approaching Minimum and Successful.
• We will cross-check the land of the flight by contacting plane via BlueTooth.
• If it is Successful?, a green LED glows. (Actually we are passing on some queries regarding landing of the flight by an Android app called AMR Voice).
• Buzzer is beeped if there are any climatic fluctuations during landing and hence it is deferred.

• This Humidity & Temperature check for the fluctuations in the climate. As climate plays the radical role in deciding whether the plane has to landed nearby or continue flying.
• Here, this condition decides this action of the plane,

if (humidity < 40 && temperature < 12) {
    lcd.setCursor(0, 0);
    lcd.print("Land your Plane");
    lcd.setCursor(5, 1);
    lcd.print("nearby");
  } else {
    saferunway();
  }

• We have also used bluetooth to its max. Voice control, this checks whether the mission is complete or not.

if (distance < 6 && distance >= 0) {
    voiceyBT();
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Successful");
  }

void voiceyBT() {
  while (Serial.available()) {
    delay(10);
    char chr = Serial.read();
    if (chr == '#') {
      break;
    }
    voice += chr;
  }
  int len = voice.length();
  if (len > 0) {
    if (voice == "*landed") {
      digitalWrite(led, HIGH);
    } else if (voice == "*okay") {
      digitalWrite(led, LOW);
    }
  }
  voice = "";
}

By glowing green LED bulb.

• Climatic fluctuations and vagaries are measured and calculated to perform the tasks.
• Distance is accurately counted.
• Check whether plane is landed by bluetooth stimuli and generate respective responds.