# Can't select MCU-Linux

**URL:** <https://klipper.discourse.group/t/cant-select-mcu-linux/13059>\
**Category:** General Discussion\
**Created:** [January 12, 2024, 7:09am UTC](https://klipper.discourse.group/t/cant-select-mcu-linux/13059 "2024-01-12T07:09:51Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![diem](https://avatars.discourse-cdn.com/v4/letter/d/ecd19e/32.png) [@diem](https://klipper.discourse.group/u/diem)\
**Post date:** [January 12, 2024, 7:09am UTC](https://klipper.discourse.group/t/cant-select-mcu-linux/13059/1 "2024-01-12T07:09:51Z")

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[klippy (1).log](https://klipper.discourse.group/uploads/short-url/nWEqcrNbmp3fQONYkkrjVJXSRRJ.log) (255.5 KB)  
[dmesg.txt](https://klipper.discourse.group/uploads/short-url/cNheaFt0peGT53unttOCWr18hnm.txt) (47.1 KB)  
my issue like you . help me ?  
i install Debian , klipper, moonraker, mainsail with kiauh, so my orange pi zero 3 can’t connect to mcu …

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**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\
**Post date:** [January 12, 2024, 8:06am UTC](https://klipper.discourse.group/t/cant-select-mcu-linux/13059/2 "2024-01-12T08:06:29Z")

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Hello @diem !

Please give us a bit more information.

What did you try to get the connection?  
What printer do you have?

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**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [January 12, 2024, 8:14am UTC](https://klipper.discourse.group/t/cant-select-mcu-linux/13059/3 "2024-01-12T08:14:46Z")

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```auto
mcu 'mcu': Unable to open serial port: [Errno 2] could not open port /dev/serial/by-id/ttyS0: [Errno 2] No such file or directory: '/dev/serial/by-id/ttyS0'

```

The path `/dev/serial/by-id/ttyS0` cannot be correct. Follow [Installation - Klipper documentation](https://www.klipper3d.org/Installation.html#building-and-flashing-the-micro-controller)

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**Author:** ![diem](https://avatars.discourse-cdn.com/v4/letter/d/ecd19e/32.png) [@diem](https://klipper.discourse.group/u/diem)\
**Post date:** [January 13, 2024, 5:09am UTC](https://klipper.discourse.group/t/cant-select-mcu-linux/13059/4 "2024-01-13T05:09:02Z")

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My 3d machine ís voxelab x2 h32 , I flash the share klipper.bin in github . When install debian bookworm, and kiauh already i try to connect the printer so orange pi zero 3 can’t found mcu, /dev/serial/by-id/. Or /by-path/ not work and. Then I try to change my path after ttys0 it didn’t work too , I guess my debian bookworm 6.1 witn mainsail have problem and changes another Linux 5. but it can’t found mcu

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**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [January 13, 2024, 9:41am UTC](https://klipper.discourse.group/t/cant-select-mcu-linux/13059/5 "2024-01-13T09:41:39Z")

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> [@diem](#):
>
> voxelab x2 h3

Most likely you did not flash your board correctly. This chip is not natively supported by Klipper but there has been some work done by @SteveGotthardt.

I’m not sure what the latest status is, so maybe best to ask here: [Support for HDSC chips (HC32F460)](https://klipper.discourse.group/t/support-for-hdsc-chips-hc32f460/2860)

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<div class="post-metadata">

**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\
**Post date:** [April 24, 2024, 1:13pm UTC](https://klipper.discourse.group/t/cant-select-mcu-linux/13059/6 "2024-04-24T13:13:39Z")

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Closed on April 24, 2024, 1:13pm UTC