静水流深4134小学lv1

哦没事了，是我在烧录程序之前先接了线，所以串口被占用了

你好，我的发送端arduino没问题，但是esp8266就一直上传程序失败，esptool.py v3.0
Serial port COM3
Connecting........_____....._____....._____....._____....._____....._____.....____Traceback (most recent call last):
File "C:UsersHPAppDataLocalArduino15packagesesp8266hardwareesp82663.0.2/tools/upload.py", line 66, in
esptool.main(cmdline)
File "C:/Users/HP/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/esptoolesptool.py", line 3552, in main
esp.connect(args.before, args.connect_attempts)
File "C:/Users/HP/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/esptoolesptool.py", line 529, in connect
raise FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error))

esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header
请问这种情况应该怎么办？