아두이노 초음파거리센서 코드

#define TRIG_PIN 6
#define ECHO_PIN 7

unsigned long duration, distance;
int send_time = 500;
unsigned long befor_time = 0;

void setup() {
  pinMode(ECHO_PIN, INPUT);
  pinMode(TRIG_PIN, OUTPUT);
  Serial.begin(115200);
  befor_time = millis();  
}

void loop() {
  unsigned long now = millis();
  if( now - befor_time >= send_time ){
    befor_time = now;
    digitalWrite(TRIG_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG_PIN, LOW);  
    duration = pulseIn(ECHO_PIN, HIGH);
    distance = ((float)(340 * duration)/1000)/2;
    Serial.print("DISTANCE\r" + String(m) + "\n"); 
  }
}

★ [ IOT코아 ]에서 실행방법은 아래 링크를 참고하세요

 

https://koa-rea.tistory.com/48

아두이노 HC-SR04 센서값 IOT 코아에서 보기