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小夜燈photoresisterLED.ino
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//photoresisterLED.ino
int data =-1;//光敏電阻回傳的資料
void setup() {
  pinMode(LED_BUILTIN, OUTPUT);//D0
  Serial.begin(9600);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  data = analogRead(A0);
  Serial.println(analogRead(A0));
  if(data<5){
    digitalWrite(LED_BUILTIN, LOW);//on
  }else{
    digitalWrite(LED_BUILTIN, HIGH);//off  
  }
}
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