Learn CIRCUITPYTHON with Real Code Examples

Install CircuitPython firmware on a supported microcontroller

Connect the board via USB to a computer

The board appears as a USB drive

Copy or edit code.py directly on the board

Install additional CircuitPython libraries as needed

Install CircuitPython firmware

Connect board via USB

Ensure compatible libraries are in lib/

Write code.py for project logic

Test peripherals and iterate scripts

code.py - main script

boot.py - optional boot configuration

lib/ - hardware libraries

data/ - files and logs

assets/ - images, fonts, or media files

Copy code.py to board USB drive

Use REPL: screen /dev/ttyUSB0 115200

Update libraries in lib/ folder

Reset board to rerun code.py

Monitor serial output for debugging

Supports UTF-8 for string handling

No built-in localization for hardware messages

Community resources may provide translations

Works globally on supported boards

Documentation often in English

Easy-to-read Python syntax

REPL for interactive experimentation

USB drive editing supports all major OS

Libraries simplify hardware interactions

Educational materials widely available

LEDs, displays, and buttons as primary interfaces

No native graphical UI

Dashboards possible via connected PC or web interface

Visual feedback through NeoPixels or OLED screens

Focus on simplicity and interactivity

Variables in code.py store current device state

Sensor readings updated in loops

Actuator outputs reflect script logic

REPL can inspect and modify state

Persistent data stored in files if needed

Raw sensor values read via pins

Processed in code.py for control decisions

Optional logging in onboard storage

Data transmitted via Wi-Fi/Ethernet if available

Memory management critical for small boards