Pin 'ar44' is not a valid pin name on mcu 'mcu'

Basic Information:

Printer Model: Anycubic Mega-S stock
Connected to Raspberry pi 3 with fluidd

Describe your issue:

As title says, I’m still trying to connect an Anycubic Mega-S to a raspberry pi 3b+ with Klipper firmware and Fluidd.

Everything is set up (I think) but fluidd gives me the error in the title.

Here it is my printer.cfg file:

This is the Klipper log:

the mcu serial is correctly set with its unique id using

ls /dev/serial/by-id/*

Any help? Thanks!

You can directly drag and drop your config files and klippy.log into your posts here without using an external file hoster.

Where is your config from?
Depending on the used MCU/board there might be different pin aliases.
Did you check what board is installed?

Maybe you have to put this underneath the serial entry inside the [MCU] category:
pin_map: arduino

I’ve solved the issue putting this in the printer config:

[board_pins arduino-mega]
aliases:
ar0=PE0, ar1=PE1, ar2=PE4, ar3=PE5, ar4=PG5,
ar5=PE3, ar6=PH3, ar7=PH4, ar8=PH5, ar9=PH6,
ar10=PB4, ar11=PB5, ar12=PB6, ar13=PB7, ar14=PJ1,
ar15=PJ0, ar16=PH1, ar17=PH0, ar18=PD3, ar19=PD2,
ar20=PD1, ar21=PD0, ar22=PA0, ar23=PA1, ar24=PA2,
ar25=PA3, ar26=PA4, ar27=PA5, ar28=PA6, ar29=PA7,
ar30=PC7, ar31=PC6, ar32=PC5, ar33=PC4, ar34=PC3,
ar35=PC2, ar36=PC1, ar37=PC0, ar38=PD7, ar39=PG2,
ar40=PG1, ar41=PG0, ar42=PL7, ar43=PL6, ar44=PL5,
ar45=PL4, ar46=PL3, ar47=PL2, ar48=PL1, ar49=PL0,
ar50=PB3, ar51=PB2, ar52=PB1, ar53=PB0, ar54=PF0,
ar55=PF1, ar56=PF2, ar57=PF3, ar58=PF4, ar59=PF5,
ar60=PF6, ar61=PF7, ar62=PK0, ar63=PK1, ar64=PK2,
ar65=PK3, ar66=PK4, ar67=PK5, ar68=PK6, ar69=PK7,
analog0=PF0, analog1=PF1, analog2=PF2, analog3=PF3, analog4=PF4,
analog5=PF5, analog6=PF6, analog7=PF7, analog8=PK0, analog9=PK1,
analog10=PK2, analog11=PK3, analog12=PK4, analog13=PK5, analog14=PK6,
analog15=PK7,
# Marlin adds these additional aliases
ml70=PG4, ml71=PG3, ml72=PJ2, ml73=PJ3, ml74=PJ7,
ml75=PJ4, ml76=PJ5, ml77=PJ6, ml78=PE2, ml79=PE6,
ml80=PE7, ml81=PD4, ml82=PD5, ml83=PD6, ml84=PH2,
ml85=PH7

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