Improved and added Ultrasonic Sensor code

Arduino/ultrasonic_sensor/ultrasonic_sensor.ino

@@ -1,33 +0,0 @@
-long duration;
-int distance;
-
-const int trigPin = 10;
-const int echoPin = 11;
-
-void setup() {
-  // put your setup code here, to run once:
-  pinMode(trigPin, OUTPUT);
-  pinMode(echoPin, INPUT);
-  Serial.begin(115200);
-
-}
-
-void loop() {
-  // put your main code here, to run repeatedly:
-  digitalWrite(trigPin, LOW);
-  delayMicroseconds(2);
-
-  digitalWrite(trigPin, HIGH);
-  delayMicroseconds(10);
-  digitalWrite(trigPin, LOW);
-
-  duration = pulseIn(echoPin, HIGH);
-
-  distance = duration * 0.034 / 2;
-
-  Serial.print("Distance: ");
-  Serial.println(distance);
-
-
-
-}