#define PIN_TRIG 12
#define PIN_ENCO 11
long duration, cm;

void setup() {


Serial.begin (9600);

pinMode(PIN_TRIG, OUTPUT);
pinMode(PIN_ENCO, INPUT);

}

void loop() {


digitalWrite(PIN_TRIG, LOW);
delayMicroseconds(5);
digitalWrite(PIN_TRIG, HIGH);

delayMicroseconds(10);
digitalWrite(PIN_TRIG, LOW);

duration = pulseIn(PIN_ENCO, HIGH);

cm = (duration / 2) / 29.1;
Serial.print(cm);
Serial.print(" см ");

delay(250); }