There may come a time when you want to update the firmware on the ESP32 itself. This isn't something we expect you'll do often if at all, but its good to know how if you need to.
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Adafruit PyPortal - IoT for CircuitPython
Create all the things for the “Internet of Things” in minutes
by
Kattni Rembor
and
Contributors:
published February 26, 2019, last edited October 30, 2025
last major update February 28, 2023
last major update February 28, 2023
![A terminal screen displays a command prompt with "==> []" on a dark background, indicating readiness for input. Indicative of a command line interface for CircuitPython.](https://cdn-learn.adafruit.com/guides/cropped_images/000/002/418/medium640thumb/ezgif.com-video-to-gif_%282%29.gif?1550616816)
