Boot.py crashes. Can I get back the REPL? #17005
Replies: 7 comments 2 replies
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Which board do you use? For ESP32/ESP8266 there is a erase_flash option of esptool.py. For RPi Pico there is a flash_nuke.uf2 firmware which erases the flash. https://datasheets.raspberrypi.com/soft/flash_nuke.uf2 |
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I am on ESP32-S3 but I would like to be able to keep all of the files.
(Other than the boot.py file)
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Unfortunately there's no "safe mode" boot on esp32 port, if you're not able to interrupt MicroPython with Ctrl-C then you'll need to erase the flash to recover. (See the relevant docs here: https://www.micropython.org/resources/docs/en/latest/reference/reset_boot.html#soft-bricking-failure-to-boot) |
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There is the mp-image-tool https://github.com/glenn20/mp-image-tool-esp32 which allows direct manipulation of the partitions. AFAIK, it allows to remove files from a partition. Maybe it works in your case. |
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Thanks for the suggestion but the program in the boot.py file crashes the device before it has a chance to let the mp-image-tool to work. |
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One option is still to create a firmware which does not run boot.py. That happens in line 144 of ports/esp32/main.c. The easiest change is to replace "boot.py" with the name of a non-existing file. |
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I tried flashing a new firmware to it but afterwards it says that the flash is corrupted and that I should make a flash snapshot to try to recover it. Do you know how I would do that? |
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The reason may be, that the new firmware uses a different file system or a different flash layout. |
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Ok. I just had some files that I would have preferred not to have lost on there. Fortunately I think I have a (not too recent) backup. |
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I accidentally named a file that crashes the device to be
boot.pyso now I cannot access the REPL to delete the file. I have some important files on it so I don’t want to just reflash the firmware. Is there a way to delete just theboot.pyfile or get all the files off of the device?Beta Was this translation helpful? Give feedback.
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