Documentation Suggestion: ESP8266 GDB Debugging and Flash Button Useage

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  • February 19, 2017 at 14:53 #10471
    gojimmypi
    Participant

    Greetings,

    When following the tutorial on this page:

    https://visualgdb.com/tutorials/esp8266/gdbstub/

    Specifically step 9:

    “Once you boot the board into the bootloader mode, press OK. VisualGDB will start uploading the image”

    I have found that in some cases, particularly om the ESDP8266 NodeMCU – that I need to *hold down* the flash button until VisualGDB starts to program. Then it can be released. If I release the button before transfer begins, I will get a “Unexpected reply from ESP8266” dialog box.

    This seems to only be a problem *after* getting into flash mode the first time, *and then* powering down / resetting the board:  I can repeatedly flash after the first successful flash-mode programming, but after power cycle – I need to hold down the flash button until programming starts.

    Do you think it might be helpful to add this clarification?

    Cheers

     

    February 19, 2017 at 19:19 #10477
    support
    Keymaster

    Hi,

    Normally VisualGDB tries to replicate the RTS/DTR sequence used by the esptool.py in order to reset the board into the bootloader, so it may be a bug related to that mechanism.

    We will double-check this on hardware when the NodeMCU we ordered arrives.

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