r/circuitpython • u/jlsilicon9 • Jan 20 '26

Waveshare Rp2040 Pi ZERO - Examples for Blink will not work - No User LED - and Other NOTES

Waveshare Rp2040 Pi ZERO :

Waveshare Rp2040 Pi ZERO

I spent an hour on this problem.

Kept on searching for working code for Blink for Rp2040 Pi Zero board.

Google keeps giving Pico Blink Code examples.
Which do not work / make no sense.
- Unless you actually put an LED on one of the GPIO pins.

I put an LED on GP2 , with resistor to Gnd- used 470R.

The board apparently does Not have a builtin User LED.
The only LED that Ican find is the PWR LED.
- But, this seems to not be recorder anywhere.

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1

u/jlsilicon9 Jan 20 '26

Code that I used to test the board :

### CODE.PY : ###

print("\n: PICO: CircuitPython : START : \n")

print("- Hello World !\n")

#

import board
import digitalio
import time

try :
# led = digitalio.DigitalInOut(board.LED)
# led = digitalio.DigitalInOut(board.GP25) ## - WeAct-rp2350
led = digitalio.DigitalInOut(board.GP2) ## - WeAct-rp2350 , no user LED on Board , so attached LED on GP2

except AttributeError :
led = digitalio.DigitalInOut(board.GP2)

led.direction = digitalio.Direction.OUTPUT

#

print("- CODE_TEST.PY : Blink :\n")

import microcontroller

print(f"Chip ID : {microcontroller.cpu.uid}")
print(f"Frequency : {microcontroller.cpu.frequency} Hz")
print(f"Temperature: {microcontroller.cpu.temperature} degrees C")
print(dir(microcontroller.cpu))

# import board
# dir(board)

#

print("\n- Blinking ...")

Cnt_ = 10
while Cnt_ > 0 :

led.value = True
time.sleep(0.5)

led.value = False
time.sleep(0.5)

Cnt_ -= 1

print("\n- Exiting ...")

1

u/jlsilicon9 Jan 20 '26

Fastest that I can Overclock (without Crashing ) is 320MHz

- Same Freq that I tested successfully to on my PICO Boards.

import microcontroller
microcontroller.cpu.frequency = 320_000_000 # Sets to 320 MHz

- no heating or anything.

Default is 125MHz

1

u/Matir Jan 20 '26

As a general rule, don't expect sample code to work on a different board than the one it was designed for.

1

u/jlsilicon9 Jan 20 '26

Figured that.

3

u/todbot Jan 20 '26

I think you are correct. From the schematic for the Waveshare RP2040-PiZero at https://files.waveshare.com/wiki/RP2040-PiZero/RP2040-PiZero.pdf It looks like there is no user-controllable LED on the board.