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@blister
Last active January 20, 2019 23:28
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long ping() {
long duration;
// clear ping pin
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(10);
digitalWrite(pingPin, LOW);
duration = pulseIn(echoPin, HIGH);
return duration;
}
// Helper function to return the distance to an object
// detected by the ultrasonic sensor in centimeters.
long msToCm(long microseconds) {
return microseconds * .034 / 2;
}
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