void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  byte a=0b10110111;
  for(int i=0;i<=7;i++){
    Serial.printf("%d的第%d位是%d\n",a,i,bitRead(a,i));
    delay(500);
  }
}