Analog 4 (P29) not working on Seeed Studio XIAO RP2040

[eurorackworld]

I'm setting up a very simple 4 potentiometers controller on a Seeed Studio XIAO RP2040 (original, see here). But only the first 3 potentiometers work (on P26, P27 and P28) but the 4th one doesn't work (on P29). Already tested if anything was wrong with the pot's and they are fine. I didn't change the RP2040 into a new one yet, but I'm assuming that wouldn't be this issue.

First I used the xiao_rp2040.uf2 file which is included in the repository here on Github. But as the 4th analog input wasn't working I created my own YML to make sure I had the rights pin selected and the config is ok. My config was quite empty, only had this:

---

mcu: "rp2040"
usb: true
analog:
type: "native"
inputVoltage: "3.3"
pins:
-
port: "0"
index: 26
-
port: "0"
index: 27
-
port: "0"
index: 28
-
port: "0"
index: 29

Any idea what is wrong here? Not sure if this board is 'supported officially', but this should be a quite straight out of the box working thing, not sure if I'm doing something wrong here.

[AlpesMachines]

on the official raspi2040, the 4th analog is not available on a pinheader as there is a direct connection to a temperature sensor

[paradajz]

Pin 29 is an internal pin only for temperature sensor which cannot be used as normal analog input. This was added back when I still didn't know this (and this is actually the reason I've implemented mux-on-mux connection scheme as I didn't have enough inputs on the OpenDeck L board). I've forgot about this target. That pin is removed now.