arduino超声波传感器代码 -

标题: arduino超声波传感器代码 [打印本页]

作者: h124020135 时间: 2019-1-1 16:38
标题: arduino超声波传感器代码
int trigger_pin = 2;

int echo_pin = 3;

int led_pin = 10;

int time;

int distance;

void setup ( ) {

      Serial.begin (9600);

      pinMode (trigger_pin, OUTPUT);

      pinMode (echo_pin, INPUT);

      pinMode (led_pin, OUTPUT);

}

void loop ( ) {

digitalWrite (trigger_pin, HIGH);

delayMicroseconds (10);

digitalWrite (trigger_pin, LOW);

time = pulseIn (echo_pin, HIGH);

distance = (time * 0.034) / 2;

  if (distance <= 20)

      {

      Serial.println (" Door Open ");

      Serial.print (" Distance= ");

      Serial.println (distance);

      digitalWrite (led_pin, HIGH);

      delay (500);

      }

  else {

      Serial.println (" Door closed ");

      Serial.print (" Distance= ");

      Serial.println (distance);

      digitalWrite (led_pin, LOW);

      delay (500);

  }

  }

作者: admin 时间: 2019-1-1 20:36
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