int trigpin = 15; // output
int echopin = 16; //input
float duration, distance;
void setup() {
  Serial.begin(115200);
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);

}
 

void loop() {
digitalWrite(trigpin, HIGH);
delay(10); // can use --delayMicroseconds();--
digitalWrite(trigpin, LOW);
duration = pulseIn(echopin, HIGH);
distance = 0.017 * duration;

Serial.print("Distance = ");
Serial.print(distance);
Serial.println(" cm");


Serial.print("Duration = ");
Serial.print(duration);
delay(1000);




}