Introduction to Python and Microcontrollers

Advanced Setup

Offline Mode

To have the ESP32-S3 run code automatically after reset or power-on:

1. In Thonny’s file panel, open boot.py from the reference_code folder.
2. Right-click boot.py → Upload to / to upload it to the MicroPython device root.
3. Right-click your code file (e.g., HelloWorld.py) → Upload to /.
4. Press the Reset button on the ESP32-S3. Your code will execute automatically.

To exit offline mode, click in the Shell panel and press Ctrl+C.

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Common Thonny Operations

Task	How
Upload file to ESP32-S3	Right-click file on computer → Upload to /
Download file from ESP32-S3	Right-click file on MicroPython device → Download to…
Delete file from ESP32-S3	Right-click file on MicroPython device → Delete
Create new file	File → New, write code, then Save → MicroPython device → name it main.py
Exit offline mode	Click Shell, press Ctrl+C

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