void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(23, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(32, INPUT_PULLDOWN);
}
 
void loop() {
static unsigned long prevMs = 0;
unsigned long currMs = millis();
digitalWrite(23, digitalRead(32));
 
  if (currMs - prevMs >= 1000) { //// 每過 1000 毫秒（1 秒）執行一次
    prevMs = currMs;  // 更新上次時間
    digitalWrite(22, !digitalRead(22));// 讓 GPIO 22 的 LED 狀態反轉（閃爍）
  }
}    //digitalWrite(23, !digitalRead(32)); 按下不良 不按亮