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IoT/Arduino2020. 5. 12. 13:11[아두이노] 4핀 초음파센서, 피에조스피커를 사용한 경보기만들기
//초음파,피에조 int echoPin = 4; int trigPin = 5; int buzzer = 13; //시간 int timer = 0; void setup() { //초음파센서 pinMode(trigPin,OUTPUT); pinMode(echoPin,INPUT); //피에조스피커 pinMode(buzzer,OUTPUT); Serial.begin(9600); } void loop() { //초음파센서 사용 float duration, distance; digitalWrite(trigPin,HIGH); digitalWrite(trigPin,LOW); duration = pulseIn(echoPin,HIGH); distance = ((float)(340*duration)/10000)/2; Serial..