# No connection with klipper **URL:** \ **Category:** General Discussion\ **Created:** [March 24, 2024, 7:48pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196 "2024-03-24T19:48:06Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 24, 2024, 7:48pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/1 "2024-03-24T19:48:06Z")
### Basic Information: Printer Model: Creality Ender 3v2 MCU / Printerboard:basic ender board [logs-20240324-204555.zip](https://klipper.discourse.group/uploads/short-url/CRy8YnQNit2d0zQOnG4r0ZF6VA.zip) (13.6 KB) after starting the server, information about the lack of connection with the klipper is displayed ![obraz](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/1/10a234aac6a186b73f0a7dbac27108ca35e2af04.png) [klippy.log](https://klipper.discourse.group/uploads/short-url/d4jBfqwqhlZFkXhuNd0t5GjNGlZ.log) (17.4 KB) ---
**Author:** ![hcet14](https://avatars.discourse-cdn.com/v4/letter/h/ecd19e/32.png) [@hcet14](https://klipper.discourse.group/u/hcet14)\ **Post date:** [March 24, 2024, 8:22pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/2 "2024-03-24T20:22:33Z")
> [@Dawid854](#): > > after starting the server, information about the lack of connection with the klipper is displayed Was the printer running before? The more information you share, the easier is finding a solution. What did yo do with the printer, before this message was displayed? ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 24, 2024, 9:36pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/3 "2024-03-24T21:36:08Z")
The printer has not yet been used with klipper ---
**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:** [March 25, 2024, 6:34am UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/4 "2024-03-25T06:34:46Z")
Post the klippy.log as initially required. ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 12:11pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/5 "2024-03-25T12:11:52Z")
I’ve posted klippy logs ---
**Author:** ![LifeOfBrian](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/lifeofbrian/32/2380_2.png) [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)\ **Post date:** [March 25, 2024, 1:11pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/6 "2024-03-25T13:11:40Z")
Are you running Klipper on a notebook? Under what OS exactly? What guide did you follow to install Klipper, Moonraker, etc? The Klipper ecosystem is not working properly and Klipper can’t connect to your MCU as the serial seems to be wrong. ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 1:58pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/7 "2024-03-25T13:58:12Z")
ubuntu, use kiauh ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 2:27pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/8 "2024-03-25T14:27:40Z")
does the operating system matter? ---
**Author:** ![LifeOfBrian](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/lifeofbrian/32/2380_2.png) [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)\ **Post date:** [March 25, 2024, 2:37pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/9 "2024-03-25T14:37:14Z")
As your setup is not running everything can cause that issue. On what platform is Klipper running? The mentioned **i5-4300U** suggests a mobile platform. I’m not a Linux expert but maybe there are missing rights for the involved components here. ---
**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:** [March 25, 2024, 2:47pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/10 "2024-03-25T14:47:53Z")
> [@Dawid854](#): > > does the operating system matter? Yes it does. Especially, Ubuntu desktop versions tend to have some quirks that spoil Klipper. Your error is not related Moonraker but Klipper itself and can have multiple reasons (the OS being one of them). See [Issues flashing the printer board](https://klipper.discourse.group/t/issues-flashing-the-printer-board/14015) ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 2:55pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/11 "2024-03-25T14:55:24Z")
I will try it on Ubuntu server ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 3:11pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/12 "2024-03-25T15:11:07Z")
This error may be due to incorrect CPU model selection in make menuconfig? ---
**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:** [March 25, 2024, 3:13pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/13 "2024-03-25T15:13:31Z")
Yes, incorrect settings during `make menuconfig` might be causing this as well. Again, one reason among quite a few. See the link above. ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 3:18pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/14 "2024-03-25T15:18:29Z")
write f303 on the board’s processor and there is no such choice in makeconfig ---
**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:** [March 25, 2024, 3:32pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/15 "2024-03-25T15:32:41Z")
GD32F303 uses the STM32F103 settings. What is the complete marking on the board? Creality v… ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 3:35pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/16 "2024-03-25T15:35:43Z")
creality v4.2.2 ---
**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:** [March 25, 2024, 4:17pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/17 "2024-03-25T16:17:27Z")
Yes, this is known to have a GDF303 chip. The correct settings are: - STM32F103 - 28KiB bootloader - Serial on USART1 PA10/PA9 - Make sure to rename `klipper.bin` to firmware123.bin, where 123 is changed whenever you flash ---
**Author:** ![Dawid854](https://avatars.discourse-cdn.com/v4/letter/d/c37758/32.png) [@Dawid854](https://klipper.discourse.group/u/Dawid854)\ **Post date:** [March 25, 2024, 4:25pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/19 "2024-03-25T16:25:00Z")
that’s exactly what I did before ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [May 24, 2024, 4:25pm UTC](https://klipper.discourse.group/t/no-connection-with-klipper/15196/20 "2024-05-24T16:25:50Z")
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