Reflashing os package

[Roetz Bikes]

Hi all,

Looking for some help to get out of a hole I dug myself into...

In short - I ran over the lib/os, and now I can't communicate with my GPy anymore.

More details:

I am new the pycom/micropython/microcontrollers world and have recently started playing with it. I've been trying to debug some code, and looking for a good logging implementation - and found this pycopy library. I could not figure out how to get it on my board, until I found this article explaining how to get upip installed. The article uses it to install uasyncio - but I figured it's the same to install any pip package. That worked quite well, and I indeed got upip install, and then ran: upip.install("pycopy-logging", "lib"), resulting in the following output:

Installing to: lib/
Warning: pypi.org SSL certificate is not validated
Installing pycopy-logging 0.7.5 from https://files.pythonhosted.org/packages/07/2b/380b0db9e18ec7a37d0cca211ba9edde3d31c67e76d8df76847a8c86d694/pycopy-logging-0.7.5.tar.gz
Installing pycopy-os 1.1.3 from https://files.pythonhosted.org/packages/45/1d/e0cd14fbe9a746d9971bdac179d7be1bba91f25af26abd54e6f557b8733b/pycopy-os-1.1.3.tar.gz
Installing pycopy-errno 0.1.4 from https://files.pythonhosted.org/packages/ab/7c/a0d03cb169f37dc9a9de9fd40376d6f8a781b29768c45cb22158edb11985/pycopy-errno-0.1.4.tar.gz
Installing pycopy-os.path 0.2.8 from https://files.pythonhosted.org/packages/31/ee/d9ad507eeb2b25f6ac6340e02b953a57523248dee9c96a5837b31d2e8e9c/pycopy-os.path-0.2.8.tar.gz
Installing pycopy-stat 0.5.1 from https://files.pythonhosted.org/packages/65/95/ff904fce737681df1e6bda82c7618f1212a285b9650c73547af5757440cf/pycopy-stat-0.5.1.tar.gz
Installing pycopy-uos2 0.5.6 from https://files.pythonhosted.org/packages/ef/1b/f178f71d0e592eb17704ed28eebe5eb86c8882cd6a2c58028783df7e2b27/pycopy-uos2-0.5.6.tar.gz
Installing pycopy-ffilib 0.2.1 from https://files.pythonhosted.org/packages/60/d3/5f63d48a0699515eaafc01750bcc8ae926da8fd84ba2c8ab0561ea4aac55/pycopy-ffilib-0.2.1.tar.gz
>>> Running main.py

>>> 
>>> Traceback (most recent call last):
  File "<stdin>", line 8, in <module>
  File "/flash/lib/os/__init__.py", line 44
SyntaxError: constant must be an integer
>
Pycom MicroPython 1.20.2.r6 [v1.11-c5a0a97] on 2021-10-28; GPy with ESP32
Pybytes Version: 1.7.1
Type "help()" for more information.
>>> 

As you can see, it installed pycopy-os as a prerequisite, which is my best guess as to the reason of my issues.
At that point I didn't understand that yet, and I still had access to the REPL. However, since I could not figure out why main was not running - I tried rebooting the the GPY using the reset button, at which point it printed out:

rst:0x1 (POWERON_RESET),boot:0x1b (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8020,len:8
load:0x3fff8028,len:2128
load:0x4009fa00,len:19760
entry 0x400a05bc

And that was it.

Reinstalling the firmware does not seem to help, and I am not sure how to reflash the original software on to it. As I said - quite a noob here.

Any help is appreciated - thanks!

[goldfishalpha]

Top of the head, without going too deep into your issue, try reflashing to a really old firmware update the firmware (i.e. at least a few minor versions) from there. I only stumbled across your question because that's how I recovered a device which wouldn't boot (same log output).

[Roetz Bikes]

hi @goldfishalpha - thanks for taking the time to answer!

And good that you did, as I already solved the issue, but forgot to update. For anyone with the same problem:

Using the "Pycom Firmware Update", if you tick on "show advanced settings":

you'll have the option to "Erase during update". I've also ticked both RESET buttons, but not sure if strictly necessary:

That did the trick for me.