为什么我的Esp8266 Node Mcu显示的结果是一堆乱码

Question

之前调试蓝牙的时候也总出现同样的问题

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //使能软件看门狗的触发间隔
  ESP.wdtEnable(5000);
}

void loop() {
  //喂狗
  ESP.wdtFeed();
  FlashMode_t ideMode = ESP.getFlashChipMode();
  String coreVersion = ESP.getCoreVersion();
  Serial.print(F("Arduino Core For ESP8266 Version: "));
  Serial.println(coreVersion);
  Serial.printf("Flash real id（唯一标识符）:   %08X\n", ESP.getFlashChipId());
  Serial.printf("Flash 实际大小: %u KBytes\n", ESP.getFlashChipRealSize()/1024);
  Serial.printf("IDE配置Flash大小: %u KBytes,往往小于实际大小\n", ESP.getFlashChipSize()/1024);
  Serial.printf("IDE配置Flash频率 : %u MHz\n", ESP.getFlashChipSpeed()/1000000);
  Serial.printf("Flash ide mode:  %s\n\n", (ideMode == FM_QIO ? "QIO" : ideMode == FM_QOUT ? "QOUT" : ideMode == FM_DIO ? "DIO" : ideMode == FM_DOUT ? "DOUT" : "UNKNOWN"));
  
  delay(1000);
}