The Hardware

We will use a simple microcontroller that will blink an LED and read brightness from a photoresistor. We will program it with CircuitPython

Raspberry Pi Pico

Circuit Python

https://circuitpython.org/board/raspberry_pi_pico_w/

Plug in your fresh Raspberry Pi Pico W and it will show up as a USB drive called RPI-RP2

Download UF2 file for CircuitPython 9.1.1 and copy the adafruit-circuitpython-raspberry_pi_pico_w-en_US-9.1.1.uf2 to the RPI-RP2 drive

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After the copying is complete a new USB drive will appear called CIRCUITPY