Nano ESP32 Errno71 Protocol error

Official Hardware Nano Family Nano ESP32
1

I am trying to upload a sketch on a brand new Arduino Nano ESP32 board. The first time I try to upload some sketch, the upload works, but from the second time on I get the following error:

Traceback (most recent call last):
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool.py", line 34, in <module>
    esptool._main()
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool/__init__.py", line 1032, in _main
    main()
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool/__init__.py", line 674, in main

    esp = esp or get_default_connected_device(
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool/__init__.py", line 921, in get_default_connected_device
    _esp.connect(before, connect_attempts)
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool/loader.py", line 640, in connect
    last_error = self._connect_attempt(reset_strategy, mode)
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool/loader.py", line 525, in _connect_attempt
    reset_strategy()  # Reset the chip to bootloader (download mode)
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool/reset.py", line 83, in __call__
    self._setDTRandRTS(False, False)
  File "/home/ciccio/.arduino15/packages/esp32/tools/esptool_py/4.5.1/esptool/reset.py", line 58, in _setDTRandRTS
    fcntl.ioctl(self.port.fileno(), TIOCMSET, struct.pack("I", status))
OSError: [Errno 71] Protocol error
Failed chip erase: uploading error: exit status 1

Some things to take into account:

  • The code is uploaded using Programmer (CTRL+Shift+U), as uploading it normally resulted in the dfu-util: Failed to retrieve language identifiers dfu-util: Cannot set alternate interface: LIBUSB_ERROR_OTHER Failed uploading: uploading error: exit status 74 error;
  • This happens with brand-new boards, as well as with boards I've already been using for a long time before and didn't give me this error with any of the sketched I've tried uploading;
  • This happens with both different USB cables and different USB ports;

How could this problem be addressed? Any help in solving it will be appreciated!!

Thanks in advance :slight_smile:

Francesco

2

Have a look at this:
Reset the Arduino bootloader on the Nano ESP32 – Arduino Help Center

In particular, see the section “If the board is only recognized once or requires a double-press reset to upload a sketch.” Since your first upload works and subsequent uploads fail, the recommended full bootloader recovery procedure, including Tools → Burn Bootloader, seems worth trying.

3

Your best bet is to fix the original error.

4

This seems to indicate that you're using Espressif's ESP32 board package.
Have you tried with the Arduino ESP32 board package?

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5

Are you trying to load non-compatible code again? Nano ESP32 on bootloop after uploading sketch - #17 by jim-p