數位腳位的輸入與輸出控制

int sensorValue = 0;

void setup()
{
  Serial.begin(9600); //設定序列埠的Symbol rate。
  pinMode(LED_BUILTIN, OUTPUT); //將開發版的內建LED作為輸出腳位。
  
  Serial.println("initialization state:" + String(digitalRead(LED_BUILTIN)));
}

void loop()
{
  // 1. 讀取最新狀態並輸出 (燈亮)
  digitalWrite(LED_BUILTIN, HIGH);
  sensorValue = digitalRead(LED_BUILTIN);
  Serial.println(sensorValue);
  delay(1000); // Wait for 1000 millisecond(s)
  
  // 2. 再次讀取最新狀態並輸出 (燈滅)
  digitalWrite(LED_BUILTIN, LOW);
  sensorValue = digitalRead(LED_BUILTIN);
  Serial.println(sensorValue);
  delay(1000); // Wait for 1000 millisecond(s)
}