esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header แก้ไขยังไงครับ

esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header อัพโหลดหลายรอบแล้วขึ้นแบบนี้

esptool.py v2.8
Serial port COM6
Connecting……____Traceback (most recent call last):
File “C:\Users\k.napakorn\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.1/tools/upload.py”, line 65, in
esptool.main(cmdline)
File “C:/Users/k.napakorn/Documents/ArduinoData/packages/esp8266/hardware/esp8266/2.7.1/tools/esptool\esptool.py”, line 2890, in main
esp.connect(args.before)
File “C:/Users/k.napakorn/Documents/ArduinoData/packages/esp8266/hardware/esp8266/2.7.1/tools/esptool\esptool.py”, line 483, 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
esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header

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