# Failed automated reset of MCU 'mcu'

**URL:** <https://klipper.discourse.group/t/failed-automated-reset-of-mcu-mcu/12606>\
**Category:** General Discussion\
**Created:** [December 26, 2023, 4:48pm UTC](https://klipper.discourse.group/t/failed-automated-reset-of-mcu-mcu/12606 "2023-12-26T16:48:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![retnel](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/retnel/32/8786_2.png) [@retnel](https://klipper.discourse.group/u/retnel)\
**Post date:** [December 26, 2023, 4:48pm UTC](https://klipper.discourse.group/t/failed-automated-reset-of-mcu-mcu/12606/1 "2023-12-26T16:48:57Z")

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### Basic Information:

Printer Model: JG Maker Artist-D IDEX  
 MCU / Printerboard: MKS Robin Pro  
[klippy.log](https://klipper.discourse.group/uploads/short-url/muxWLrUpr1TrpWVabz0OXqHWRL7.log) (873.0 KB)  
Printer Config:  
[printer (1).cfg](https://klipper.discourse.group/uploads/short-url/e7dlCPKeaLkwYDfLKuHL9pHimO0.cfg) (8.9 KB)

### Describe your issue:

The printer motherboard does not reset / reboot when firmware restart is called, and it gives an error until I reset the printer manually.

 ![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/0/07345b82425fe8b70f3856941ec26020ba689bc3.png)

I added GPIO startup pin as !PA14 on the J-Tag as I understood it should be, but it did not work like other reported for the MKS Robin E3.

Thanks,  
/retnel

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<div class="post-metadata">

**Author:** ![retnel](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/retnel/32/8786_2.png) [@retnel](https://klipper.discourse.group/u/retnel)\
**Post date:** [December 26, 2023, 5:07pm UTC](https://klipper.discourse.group/t/failed-automated-reset-of-mcu-mcu/12606/2 "2023-12-26T17:07:04Z")

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I found the answer here finally.

> <https://github.com/Klipper3d/klipper/issues/3348>
>
> Any time I do a FIRMWARE\_RESTART or something that causes a disconnect like tryi…ng to move before homing axis, I cannot get it reconnected except by disconnecting USB, power cycling the printer, and restarting the klipper service. Everything else seems to be working correctly. Below are the details of the printer, board, and menuconfig.
> 
> Printer: Ender 3 Pro
> Board: Creality V4.2.2 (this is the same board used in the Ender 3 V2)
> 
> 
> 
> \`\`\`
> /home/pi/klipper/.config - Klipper Firmware Configuration
> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
> lqqqqqqqqqqqqqqqqqqqqqqq Klipper Firmware Configuration qqqqqqqqqqqqqqqqqqqqqqqqk
> x Arrow keys navigate the menu. \<Enter\> selects submenus ---\> (or empty x
> x submenus ----). Highlighted letters are hotkeys. Pressing \<Y\> includes, x
> x \<N\> excludes, \<M\> modularizes features. Press \<Esc\>\<Esc\> to exit, \<?\> for x
> x Help, \</\> for Search. Legend: \[\*\] built-in \[\] excluded \<M\> module \< \> x
> x lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x
> x x \[\*\] Enable extra low-level configuration options x x
> x x Micro-controller Architecture (STMicroelectronics STM32) ---\> x x
> x x Processor model (STM32F103) ---\> x x
> x x Bootloader offset (28KiB bootloader) ---\> x x
> x x Clock Reference (8 MHz crystal) ---\> x x
> x x \[\] Use USB for communication (instead of serial) x x
> x x \[\] Use CAN for communication (instead of serial) x x
> x x Serial Port (USART1) ---\> x x
> x x (250000) Baud rate for serial port x x
> x x \[\] Specify a custom step pulse duration x x
> x x () GPIO pins to set at micro-controller startup x x
> x x x x
> x x x x
> x x x x
> x x x x
> x x x x
> x x x x
> x mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj x
> tqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqu
> x \<Select\> \< Exit \> \< Help \> x
> mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
> 
> 
> \`\`\`
> 
> 
> 
> \[klippy20200918-2025.log\](https://github.com/KevinOConnor/klipper/files/5248816/klippy20200918-2025.log)
> \<!-- Klipper do something undesirable? YOU MUST ATTACH THE KLIPPER LOG FILE.
> See: https://github.com/KevinOConnor/klipper/blob/master/docs/Contact.md --\>

Just add restart\_method: command to [mcu}

[mcu]  
serial: /dev/serial/by-id/usb-1a86\_USB\_Serial-if00-port0  
restart\_method: command

/retnel

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [January 26, 2024, 3:07am UTC](https://klipper.discourse.group/t/failed-automated-reset-of-mcu-mcu/12606/3 "2024-01-26T03:07:47Z")

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