ESP32 for Pycopy (Pfalcon's Micropython) can be downloaded here.

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TL;DR: press 'boot' button when flashing ESP32. At least some of them.

I have connected newly bought ESP32 to usb cable and try to flash it with micropython image.

(micro) maho@dlaptop:~$ esptool.py --port=/dev/ttyUSB0 erase_flash
esptool.py v2.6
Serial port /dev/ttyUSB0
Connecting........_____....._____ …

UPDATE

Pycopy's ESP32 image can be downloaded here

If you ecounter following problem:

    TypeError: function takes 2 positional arguments but 3 were given

while trying to use uasyncio and micropython - then to save your time, learn a bit about current situation in project:

There is fork war between Micropython and …

Sometimes, when I'm debugging something using pudb (probably it affects any interactive debugger), pudb is reflecting value of variables of QuerySet type, which makes unneccesary query to database. It makes debugging slow, and sometimes it breaks debugging context because of making changes in db.

To avoid that, add following code …