Latest stable MicroPython (20210902) does not provide REPL at startup

[jmdevy]

Trying to use the 20210902 MicroPython .uf2 with the newest 0.14.2 rp2040js build does not start/display the friendly REPL

I used the instructions to run the local demo

[urish]

Did older versions work for you?

[jmdevy]

Yes

Using the 20210618 MicroPython .uf2 works fine with 0.14.2

[urish]

Can you please try to find the earliest version where it stops working?

[jmdevy]

Stable MicroPython builds for the rp2040 jump from 20210618 to 20210902 (https://micropython.org/download/rp2-pico/) and so the earliest version it stops working is technically 20210902

[urish]

Got it, there seem to be a lot of changes between these two versions, so it might take me some time to pinpoint the issue. Thanks for reporting!

What's your use case for the MicroPython simulation?

[jmdevy]

Turning mcu.logger to 'Debug' level in 'demo/micropython-run-ts' displays a lot of USB transfer messages with working 20210618 but none in 20210902.

My use case is simply messing around with it. I may try to use it to simulate graphics on a webpage using a MicroPython ssd1306 screen library in the future. Although, I have not seen an example of importing a 'custom' python file/module

[urish]

Should be fixed now!