Pimoroni Pico Plus 2 W: GPIO 16 defunct?

Support
1

Hi,

For two weeks I bought a Pimoroni Pico Plus 2 W.

When measuring the GPIOs with a voltmeter, GPIO 16 and GPIO 0 show 3.3V right after boot.
With Micropython and Zeptoforth I can set GPIO 0 to 0.0V by makeing it an output pin in “low” state. But I have no luck to set GPIO 16 to 0.0V.
The behaviour is identical with the newest Micropython for that board and with the RP2350 edition of Zeptoforth.
What did I wrong? Is my board borken? Or is this just another glitch in the RP2350?

Cheers!
mxq

2

Just tried this on my Pico Plus 2W with just the LED connected and it flashes the LED.

import time
from machine import Pin
led = Pin(16,Pin.OUT)
for i in range(5):
    led.value(1) 
    time.sleep(0.3)
    led.value(0)
    time.sleep(0.3)

Have you got anything else connected, like a display?

This is the .uf2 I am using:

MicroPython feature/psram-and-wifi, pico_plus2_rp2350 v0.0.11 on 2024-11-26; Pimoroni Pico Plus 2 (PSRAM + LTE + WiFi) with RP2350
Type "help()" for more information.
>>>

See :
Pico 2w Network Module - Support - Pimoroni Buccaneers

The .uf2 does not include the W in its file name!

3

Sigh…I think GPIO 16 is dead. I cleared the flash (flash_nuke.uf2) and still - GPIO 16 shows
3.3V.
Any ideas left?

4

It could be that there is a solder bridge between that pin and a neighbouring one on the RP2350 itself. Message support @ pimoroni . com They will help you diagnose or send out a replacement

5

First a big thank you to ZodiusInfuser - I mailed the support of Pimoroni and got a very nice and helpful answer: After posting pictures of my board the support quickly identifies the root of the problem: It was indeed a solder bridge between two legs of the mcu.
They will send me a replacement board, which is already on the way to me.
Really great support !
Thank you Pimoroni for makeing this possible in such a quick and problem free way!

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