How to recover files (code) from a bricked Raspberry Pi Pico: Micropython & hex editing
4In this video, I'll show you how to recover code and save power on your Raspberry Pi Pico, even if you've bricked it. In a previous video, I demonstrated how to clear or flash a Raspberry Pi Pico when it's bricked, but that process wiped out all the memory. Now, I'll show you how to recover your code and avoid losing your progress. I'll also explain how underclocking your Raspberry Pi Pico can save power and walk you through editing the hex dump to find and recover your main.py file. Whether you're working on a temperature probe project or another coding project, this guide will help you avoid frustration and keep your progress intact.
This is a followup on my quest to unbrick a raspberry pi pico.
in my original video (https://www.youtube.com/watch?v=wCMJaAg-owo) i used the more documented way to re-flash the pico. but what if you have files you need to recover.
this method works if you bricked a pico with micropython. I do not believe this will work if you need to recover data files used with a program in c/c++ as they use a different file system. and i have not tested how to recover those files (yet).
the way i bricked the pico (this time) is i slowed the clock to 10 MHz. from research I did after i made this video is, the usb serial clock needs to reinitialized after a clock speed change. I have not tested to do this in micropython (again yet).
this is the file i used in this video
https://micropython.org/resources/firmware/rp2-pico-20220117-v1.18.uf2
there are newer versions of micropython for the pico.
this is how i "fixed" it.
contents:
00:00 - intro
01:00 - how I bricked it (this time)
06:17 - getting hex dump of uf2 file (xxd)
07:25 - editing the hex dump (searching for main.py)
09:45 - recreating a uf2 file from the edited hexdump (xxd)
10:30 - uploading new file to the pico
12:00 - correct code that bricked pico (main.py)
12:40 - upload the standard micropython uf2 file
15:00 - closing
xxd man page
https://linux.die.net/man/1/xxd
Rp2040 Datasheet:
https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf
Raspberry Pi Pico Datasheet:
https://datasheets.raspberrypi.com/pico/pico-datasheet.pdf
Raspberry Pi Pico pinout diagram:
https://datasheets.raspberrypi.com/pico/Pico-R3-A4-Pinout.pdf
Samples & Tests git:
https://github.com/transvidium/samplesandtests
Samples & Tests website:
https://transvidium.com/samplesandtests/
Playlist: https://www.youtube.com/watch?v=A6IFsDK65OY&list=PLGBh5bnttFWtnPfSYysLVLjYUkeRF1-qH
where to get a pico: https://www.microcenter.com/product/632771/raspberry-pi-pico-microcontroller-development-board
https://www.amazon.com/dp/B09QKDTWCD?ref=ppx_yo2ov_dt_b_product_details&th=1
Samples & Tests: Blog:
https://qwerty12134.blogspot.com/
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#raspberrypipico #micropython #bricked