Where can I get an archived version of micropython that has the _thread module included?

[widgeamedoo]

I'm trying to run a program on my WEACT_F411_BLACKPILL v3.1 STM32F411CE with MicroPython v1.26.1 but it appears to be missing the _thread module.
The _thread module is present in Micropython V1.12 from github but is missing in the current versions (v1.26.0, 1.26.1 From: https://micropython.org/download/WEACT_F411_BLACKPILL/ ).
Is there an archive where I can download MicroPython v1.20 or similar?
Error message:
File "main.py", line 5, in
ImportError: no module named '_thread'
MicroPython v1.26.1 on 2025-09-11; WEACT_F411_BLACKPILL with STM32F411CE

The code in main.py:

import uasyncio as asyncio
import uos

import _thread
import machine
from scrivo import logging

[shariltumin]

You can try searching in github.com for "STM32F411 micropython", you will find a few ripos of precompiled firmware to choose from.

[widgeamedoo]

I have tried every version I can get my hands on and they all lack something that the software needs.
I have given up on the STM32 micropython.

Thanks for your help

[widgeamedoo]

Not enough consistency in the micropython releases to be usable for me. Someone writes a package that runs on a particular release of MicroPython, then subsequent releases drop the module (in my case _threads) that this code was using and the code won't run. You can only access the latest two versions of MicroPython, both are missing the _threads module. All previous MicroPython releases have been deleted. I can find a really old release of MicroPython, but that is too old.

[projectgus]

Nothing's been deleted. Official support for the WEACT_F411_BLACKPILL board was only added to MicroPython last year (PR #15646) and first released in V1.25.

That's why you can't find any older official build for this board. On other boards it's different, for example PYBD_SF2 you can get binaries back to V1.12 (2019).

The version of V1.12 you have was probably configured, built, and distributed by WeAct. AFAIK they never submitted it to us for upstream inclusion. So we have no control over what they did, although hopefully you might find some slightly newer version from them somewhere.