//--------------------------------------------- // Using the HC-SRO4 4-pin Ping dostance sensor // -- connect: 5vdc power, Gnd, 12 and 13 // //--------------------------------------------- int pingOut = 12; int echo_in = 13; void setup() { Serial.begin(9600); pinMode(pingOut,OUTPUT); pinMode(echo_in,INPUT); } void loop() { long dur; long dis; int scaledDur; digitalWrite(pingOut,LOW); delayMicroseconds(2); digitalWrite(pingOut,HIGH); delayMicroseconds(10); digitalWrite(pingOut,LOW); dur = pulseIn(echo_in,HIGH); scaledDur = (int(dur / 100)); Serial.println(String(scaledDur)); delay(100); }