# Ender 3 S1 lost connection and shutdown while printing

**URL:** <https://klipper.discourse.group/t/ender-3-s1-lost-connection-and-shutdown-while-printing/8169>\
**Category:** General Discussion\
**Created:** [May 1, 2023, 9:27pm UTC](https://klipper.discourse.group/t/ender-3-s1-lost-connection-and-shutdown-while-printing/8169 "2023-05-01T21:27:00Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![dkwolf1](https://avatars.discourse-cdn.com/v4/letter/d/977dab/32.png) [@dkwolf1](https://klipper.discourse.group/u/dkwolf1)\
**Post date:** [May 1, 2023, 9:27pm UTC](https://klipper.discourse.group/t/ender-3-s1-lost-connection-and-shutdown-while-printing/8169/1 "2023-05-01T21:27:00Z")

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### Basic Information:

Printer Model: Ender 3 S1 pro  
 MCU / Printerboard: Raspberry Pi 4B/ stm32f401xc  
 `klippy.log`

Hello guys,

In the last couple of days my prints are shutting down at about 40%. When i read the logs klipper is shutting down and power my printer off. I can see that there are some connections that are expired but i don’t understand what causes the problem. I never had this isue until last week. I didn’t change anything…I hope someone can help me.

Greetings!

ps: i delete half of my klippy.log because it was over 10mb  
[moonraker (1).log](https://klipper.discourse.group/uploads/short-url/4vtttTwpNk5TQr1IbhrferA7pzl.log) (29.5 KB)  
[klippy (1).log](https://klipper.discourse.group/uploads/short-url/z1mtjIIrbAQMYye0VR9rYheRzyQ.log) (2.3 MB)

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**Author:** ![VojtouNerCZ](https://avatars.discourse-cdn.com/v4/letter/v/ed655f/32.png) [@VojtouNerCZ](https://klipper.discourse.group/u/VojtouNerCZ)\
**Post date:** [May 2, 2023, 6:49pm UTC](https://klipper.discourse.group/t/ender-3-s1-lost-connection-and-shutdown-while-printing/8169/2 "2023-05-02T18:49:59Z")

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check if your klipper version in printer match with version on rpi or whatever you use. Gaved mi headcahes on my flsun SR, ant then I found I had mismatvhed version running.

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**Author:** ![dkwolf1](https://avatars.discourse-cdn.com/v4/letter/d/977dab/32.png) [@dkwolf1](https://klipper.discourse.group/u/dkwolf1)\
**Post date:** [May 2, 2023, 7:51pm UTC](https://klipper.discourse.group/t/ender-3-s1-lost-connection-and-shutdown-while-printing/8169/3 "2023-05-02T19:51:59Z")

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Ahh thank you. I wil check it’

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**Author:** ![dkwolf1](https://avatars.discourse-cdn.com/v4/letter/d/977dab/32.png) [@dkwolf1](https://klipper.discourse.group/u/dkwolf1)\
**Post date:** [May 2, 2023, 9:09pm UTC](https://klipper.discourse.group/t/ender-3-s1-lost-connection-and-shutdown-while-printing/8169/4 "2023-05-02T21:09:33Z")

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It is the same version…

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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:** [September 25, 2025, 3:57pm UTC](https://klipper.discourse.group/t/ender-3-s1-lost-connection-and-shutdown-while-printing/8169/5 "2025-09-25T15:57:16Z")

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