A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

  • Hi,

    i bought a few ESP32 from MH-ET and all of them are not detected from Arduino IDE. All my other ESPs (from AZDelivery) work.

    What seems strange to me is: When i plug in the AZDelivery ESPs i get a port "/dev/ttyUSB0" (that works for uploading). When i plug in the MH-ET ESP i get a "/dev/ttyACM0" (that works not). With both boards additionally i get an "/dev/ttyS0"-Port.

    Is there any chance to get them working? What am i doing wrong?

    I set the permission rights via
    sudo chmod a+rw /dev/ttyACM0
    sudo chmod a+rw /dev/ttyS0 already

    Best wishes

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