OTA of micropython code on ESP32?

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@rikvermeer, there is no class method `Partition.set_boot`. When Python (or MicroPython) executes `nextPartition.set_boot()`, then that is effectively mere syntax sugar for `Partition.set_boot(nextPartition)` due to Python's implicit self argument so you are doing the same thing and have changed nothing compared to what you originally wrote here.

And unless you are doing a `Partition.mark_app_valid_cancel_rollback()` as I stated above, then the new partition will not "stick" and will get rolled back to the original partition at next boot.