Microcontrollers: MicroPython on the Raspberry Pi Pico 2 W

The Pico 2 W is a tiny microcontroller with Wi-Fi. With MicroPython you write the same Python you already know, and it runs instantly at power-on.

Video tutorial

▶ RonsTechHubWatch on YouTube ↗

Video by RonsTechHub, embedded from YouTube. The written steps below are our own and match the parts list.

Mission steps

1. Flash MicroPython

   Hold the BOOTSEL button, plug the Pico into USB and drag the MicroPython .uf2 file for Pico 2 W onto the drive that appears.

2. Install Thonny

   Thonny is a beginner-friendly editor. Select the MicroPython (Raspberry Pi Pico) interpreter in the bottom-right corner.

3. Blink the onboard LED

   Run the example. Save it as main.py on the Pico to make it start automatically.

4. Read an analog input

   Pins GP26–GP28 are analog inputs. Connect a potentiometer or soil sensor and read values from 0 to 65535.

5. Go wireless

   Use the network module to join Wi-Fi and send readings to your Pi or Home Assistant.

Code

# main.py (MicroPython)
from machine import Pin, ADC
import time

led = Pin("LED", Pin.OUT)
sensor = ADC(26)          # GP26

while True:
    led.toggle()
    print(sensor.read_u16())
    time.sleep(0.5)

Tip: test every script on the bench before installing it in a moving machine.

Questions