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I am trying to follow this tutorial but when I get to the step...

"Once the ESP board is in bootload mode, upload the sketch via the IDE"

..I get the following error in Arduino IDE:

File "[path]/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/esptool\esptool.py", line 468, 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

Any ideas about how to fix this?

  • 1
    it is not in bootload mode – Juraj Jul 17 '19 at 5:34

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