Keyestudio Smart Little Turtle Robot V3 Manual page 101

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/*
keyestudio smart turtle robot
lesson 5.2
Ultrasonic LED
http://www.keyestudio.com
*/
int trigPin = 12;
int echoPin = 13;
long duration, cm, inches;
void setup() {
Serial.begin (9600); //Serial Port begin
pinMode(trigPin, OUTPUT); //Define inputs and outputs
// Trigger
// Echo
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