Add Arduino code to read HCSR04 sensor

arduino/read_HCSR04.ino

@@ -0,0 +1,16 @@
+#include <HCSR04.h>
+
+HCSR04 distSensor(5, 4); //initialisation class HCSR04 (trig pin , echo pin, number of sensor)
+
+void setup() { 
+  Serial.begin(9600);
+
+  pinMode(4, INPUT);
+  pinMode(5, OUTPUT);
+}
+
+void loop()
+{
+  Serial.println(distSensor.dist()); 
+  delay(100);                       
+}