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#define trig 10 #define echo 11 int duration,distance; void setup() { Serial.begin(9600); pinMode(trig,OUTPUT); // sets trig as an output pinMode(echo,INPUT); //sets echo as an input digitalWrite(trig,LOW); } void loop() { digitalWrite(trig,HIGH); delayMicroseconds(10); digitalWrite(trig,LOW); duration = pulseIn(echo,HIGH); distance = (duration/58); Serial.print("Distance="); Serial.print(distance); Serial.println("(cm)"); delay(3000); }