Printer refuses to connect to klippy / mainsail

[lethal iron]

The printer (Ender 3 neo V1 with Creality 4.2.2 board) shows up in the USB devices in mainsail as ch341-uart device, I have reflashed klipper.bin via SD card, I have verified with serial-by-id several dozen times, I have tried different USB cables, flashing my device differently, reinstalling mainsail, and klipper, and my printer.cfg
I do not know what to try next

[lethal iron]

I am legitimately lost as to why this printer is not connecting to klippy

[cinder wasp]

That error means it's not flashed correctly

You should also use the by-id path and not the by-path path, as the by-path is per usb port

Therefore changing the port will change the path

Check that your settings are matching these: https://github.com/Klipper3d/klipper/blob/master/config/printer-creality-ender3-v2-neo-2022.cfg

To use this config, during "make menuconfig" select the
# STM32F103 with a "28KiB bootloader" and serial (on USART1 PA10/PA9)
# communication.```
```# Flash this firmware by copying "out/klipper.bin" to a SD card and
# turning on the printer with the card inserted. The firmware
# filename must end in ".bin" and must not match the last filename
# that was flashed.```

The file should be renamed after the flash

Also check the mcu model

This is only for the STM32F103 and GD32F303

(yes one of these can be on the same version of the board)

[lethal iron]

Yes my creality 4.2.2 board has the GD chip

So should I use the disable swd at startup option in menu config?

[cinder wasp]

You should not activate low level config

[lethal iron]

I think the bootloader and interface settings may have been wrong during my last flash

I'll try this again tonight

[spice mica]

?

you need to disable SWD for GD chips which means you need to activate low level config

@lethal iron
enable low level
28kib boot loader
disable swd at startup
serial is serial PA10/PA11

[lethal iron]

Thank you, I'll apply these settings

[spice mica]

hold

[lethal iron]

Holding

[spice mica]

serial PA9/PA10

**

wait this is confusing me i’ve flashed these printers before

@lethal iron
enable low level
28kib boot loader
disable swd at startup
serial is USART1 PA10/PA11

[lethal iron]

Just to confirm, this is a Ender 3 Neo V1 (rare), 4.2.2 board, and Giga Device STM 32

[spice mica]

sorry for ping i copied message

yup that should be fine

what in the hell is an ender 3 v1 neo

or ender 3 v2 neo v1?

what is creality on bro

wait is your chip a GD32F103 or F303

[lethal iron]

As far as I could find about my model, Ender 3 Neo V1, no klipper documentation

[lethal iron]

Argh let me find my picture of the chipset

[spice mica]

that is a weird ass printer

anyway the v2 config should work, but unlike what klipper says, that old lcd will work unlike the v2 screen

but you need the lcd example for a cr10/ender 3

[lethal iron]

Nope, it took 1 year of custom cooking a printer.cfg that I had to manually measure and calibrate EVERYTHING

[spice mica]

but now it doesn’t connect?

[lethal iron]

After moving homes & new pi and mainsailos reinstall

[spice mica]

klipper red lash?

re flash

~the fact you’ve moved, has the cable died?~ your post said it appears as a serial device

[lethal iron]

I probably accidentally misflashed it by putting a wayward SD card in the printer during the move

[lethal iron]

Printer shows up on USB device

So cable is good

Verified with known good spares

[spice mica]

it still shouldn’t appear and not connect

you got a choice here

reflashxklipper and debug

or if you got a spare sd card try a re flash

[lethal iron]

Will be doing a reflash again with these new settings when I'm back with my printer

[spice mica]

also mr yel makes a good point

your using by path

if your on an rpi just swap between the ports easy enough

but use by id

OH

you said new pi

[lethal iron]

That was only during testing, must have pulled the log while I was trying that

[spice mica]

pi5?

oh nevermind then

[lethal iron]

Pi 3 -> Pi 4

[spice mica]

was just gonna say pi5 has a pcie lane so the by paths change

so you’ve also tried /dev/ttyUSB0?

[lethal iron]

I have tried a variation of those devices, and followed a BUNCH of rabbit holes to no avail
I agree with your original assessment that it is a flashing issue
I think specifically regarding the interface port

[spice mica]

you have no idea how many times i pulled my hair out over selecting the logical usb serial option in the menu config

there’s an option

[lethal iron]

I can't find my photo of my board, so I'll have to put my printer back on the stirrups and check

[spice mica]

‘USB Serial’

and it’s just not

it’s actually on USART1 bc it uses a chip not usb serial

[cinder wasp]

You sure? According to the config, they don't mention that at least, that's why I said, to not activate it

[cinder wasp]

reflashing the pi should not be needed

[spice mica]

if you have a newer creality printer they have GD chips

just saying

[cinder wasp]

I said, what's written here, just saying

[spice mica]

yup but that’s not his printer

early his printer but not

[cinder wasp]

The board is the one written there

[spice mica]

effectively ye

but not the exact printer

[lethal iron]

I finally got back with my printer and am able to work on it
following your suggestion here I find issue as this is what make menuconfig option I should select here?

I am also able to open it back up and confirm the chipset model

[spice mica]

the second one down

[spice mica]

you could do that, or just try one and if it doesn’t work try the other

[lethal iron]

try the other *?

[spice mica]

nah nah

[spice mica]

you able to vc and or scree share?

[lethal iron]

not at the moment, I'm with my family

[spice mica]

ok i guess screenshots work

[lethal iron]

you could do that, or just try one and if it doesn’t work try the other "What?"

[spice mica]

@lethal iron
enable low level
28kib boot loader
disable swd at startup
serial is USART1 PA10/PA9

chip architecture STM microelectronics
chip STMF103

[spice mica]

the chip, some of the ender 3 neos shipped with newer chips then i remembered you have a v1

[lethal iron]

heyyyy I got printer connection

[spice mica]

:)

i guarantee you either flashed wrong firmware or serial port was wrong

[lethal iron]

mind helping me ensure it's actually online and working, aka help with printer.cfg?

[spice mica]

i can try

i would’ve thought the pins and stuff would be same as ender 3 v2

[lethal iron]

let me see if it heats and lets me remove the filament still left in the tube

[spice mica]

best bet is to test all the motors and heaters

[lethal iron]

I even have my display back, that took MONTHS to find the right config to get the pins right

[spice mica]

really?

it’s the same screen as cr10-ender3 isn’t it

what did creality do to your poor printer 😭

[lethal iron]

yeah i had to do a fuckton of research and piece several configs together

[spice mica]

if you can find a board schematic you should be good

but idk

[lethal iron]

That's fair, this printer is my only one I have left, and it really is my "project car"

[spice mica]

lol

[lethal iron]

someday I dream of making a voron, for now my hotend is heating up and we will see where we are at

[spice mica]

lol

my school has this massive corexy printer that broke at some point we’re gonna make a voron out of pls

PLA

[lethal iron]

It seems to be working but I need to do massive amount of calibration @spice mica as it's tapping the glass with the nozzle during heighmap probe

I've moved like, twice, since I last had it working, so absolutely every dimesnion is off