PyPortal Pynt ESP firmware update issue

Briefly, I own two [PyPortal Pynts](https://www.adafruit.com/product/4465) Espressif ESP32 Wi-Fi coprocessor with TLS/SSL support built-in. Using the Adafruit CPython Miniesptool, one was able to update to NINA_W102-1.7.3 after 5 or 6 attempts, but the second one has not yet succeeded even after at least 100 reboots. Even the update from 6.1.x to 1.7.1 were quite tedious and took hundreds of attempts. To see the details, please follow this link, [Adafruit Customer Service Forum: Pyportal Pynt IO and SSL](https://forums.adafruit.com/viewtopic.php?f=60&t=174597). Page 5 details my workflow.

Please feel free to contact me if you have any questions about my procedures. Thanks everyone!

Review issue #27 and the linked Adafruit Customer Service Forum thread, especially page 5 for the reported workflow. Then inspect the miniesptool update process to determine why PyPortal Pynt firmware updates repeatedly fail; the issue does not name files, tests, or a precise completion criterion.

Written by the indexing model from the issue text.