MicroPython quickstart

Velxio doesn’t approximate MicroPython — it boots the real MicroPython firmware on the emulated chip. import machine behaves like on hardware, and the serial monitor doubles as the REPL.

Try it in one click

Open the gallery’s night-light example — an LDR (photoresistor) controlling an LED, in pure MicroPython:

Note the toolbar: the language selector reads MicroPython and the file tree shows main.py instead of a sketch. Press Run:

While it runs, click the photoresistor and drag its light level — the ADC reading changes and the LED flips exactly as the code decides.

The essentials

from machine import Pin, ADC
import time

led = Pin(4, Pin.OUT)
ldr = ADC(Pin(34))

while True:
    if ldr.read() < 1000:   # dark
        led.on()
    else:
        led.off()
    time.sleep_ms(200)

• machine.Pin / ADC / PWM / I2C / SPI — drive the same simulated peripherals Arduino sketches do.
• The REPL — stop your script and type Python interactively in the serial monitor; help() works, tab-completion works.
• WiFi — on ESP32 boards, network.WLAN joins Velxio-GUEST like on hardware: see ESP32 WiFi.
• Extra modules — add pure-Python files next to main.py and import them; see Using libraries.

Which boards

MicroPython is available on the Raspberry Pi Pico / Pico W (its native home) and across the ESP32 family — the full matrix is in Languages. Switch any supported board to MicroPython with the toolbar’s language selector; Velxio swaps the file set for you.