MicroPython

TL; DR;

• https://circuitpython.org/board/seeeduino_xiao_rp2040/
• Download .UF2 file
• Reboot RP2040 in boot mode (boot button pressed while reset released)
• Your module now appears like a USB-KEY / DISK : copy the downloaded .UF2 file in it
• Your module will restart and reappear as a USB KEY/DISK
• To load a code, simply copy your .py file to that “disk”

See also : https://wiki.seeedstudio.com/XIAO-RP2040-with-CircuitPython/

Hello World

Create a main.py file and copy this code into it, then copy it to the virtual “USB-KEY/DISK”.

Blinking the onboard blue led, minimalistic code.

"""Example for Pico. Blinks the built-in LED."""
import time
import board
import digitalio

led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT

while True:
    led.value = True
    time.sleep(0.5)
    led.value = False
    time.sleep(0.5)

Playground / sandbox board