+
+
+// Ultrasuoni
+boolean distanceCheck() {
+// Verifica se la distanza di un oggetto e' minore di minDistance
+ digitalWrite(trigPIN, LOW); // Prepare for ping
+ delayMicroseconds(2); //
+ digitalWrite(trigPIN, HIGH); // Send a ping
+ delayMicroseconds(10); //
+ digitalWrite(trigPIN, LOW); // Set down ping
+ duration = pulseIn(echoPIN, HIGH);
+ //distance = (duration / 2) / 29.1; // Speed is ~300m/s,
+ // so it takes ~29.1 milliseconds for a cm.
+ distance = (duration / 58.2); // Atmegas are not found of divisions
+ // Distance is half of (out + back)
+#ifdef DEBUG
+Serial.print("Distanza oggetto: ");
+Serial.println(distance);
+#endif
+ if (distance < minDistance) { // This is where the LED On/Off happens
+ return 1;
+ }
+ else {
+ return 0;
+ }
+}
+
+int distanceMonitor() {
+// Ritorna la distanza di un oggetto in cm
+ digitalWrite(trigPIN, LOW); // Prepare for ping
+ delayMicroseconds(2); //
+ digitalWrite(trigPIN, HIGH); // Send a ping
+ delayMicroseconds(10); //
+ digitalWrite(trigPIN, LOW); // Set down ping
+ duration = pulseIn(echoPIN, HIGH);
+ //distance = (duration / 2) / 29.1; // Speed is ~300m/s,
+ // so it takes ~29.1 milliseconds for a cm.
+ distance = (duration / 58.2); // Atmegas are not found of divisions
+ // Distance is half of (out + back)
+
+ return distance;
+}