Firmware creates and uses main.py/boot.py and not main.mpy/boot.mpy

[martijnthe]

• Board: LoPy 4
• Firmware: v1.18.1.r1

Steps to reproduce:

• Use mpy-cross to create a main.mpy and boot.mpy and load them onto an empty device's filesystem into /flash/main.mpy.
• Reboot the device.

Expected results:

• I would expect main.mpy and boot.mpy to be executed, but they are not being executed.

Actual results:

• main.py and boot.py are being created upon boot and used instead of the .mpy files. Using os.listdir() one can see the .py files have been created, alongside the .mpy ones...

[robert-hh]

That seems intentional and is hardcoded. You could try to add these lines to boot.py:

from machine import main
main("main.mpy")

Is then at least main.mpy executed? Obviously, you could give your file also a different name.

[martijnthe]

As a work-around, I ended up having single import main_alt / import boot_alt lines in the main.py/boot.py and that would just import the main_alt.mpy and boot_alt.mpy.