# MCU restarts randomly mid-print **URL:** \ **Category:** General Discussion\ **Created:** [February 19, 2025, 1:13am UTC](https://klipper.discourse.group/t/mcu-restarts-randomly-mid-print/22079 "2025-02-19T01:13:49Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![panasoloo](https://avatars.discourse-cdn.com/v4/letter/p/90ced4/32.png) [@panasoloo](https://klipper.discourse.group/u/panasoloo)\ **Post date:** [February 19, 2025, 1:13am UTC](https://klipper.discourse.group/t/mcu-restarts-randomly-mid-print/22079/1 "2025-02-19T01:13:49Z")
### Basic Information: Printer Model: Sidewinder X1 MCU / Printerboard: SKR 1.4 Host / SBC: Rpi 3b+ klippy.log `Stats 7523.4: gcodein=0 mcu: mcu_awake=0.062 mcu_task_avg=0.000238 mcu_task_stddev=0.000245 bytes_write=9319369 bytes_read=1653584 bytes_retransmit=2953 bytes_invalid=7 send_seq=167432 receive_seq=167429 retransmit_seq=167432 srtt=0.004 rttvar=0.001 rto=5.000 ready_bytes=605 upcoming_bytes=13977 freq=16000659 heater_bed: target=75 temp=75.5 pwm=0.000 sysload=0.28 cputime=383.185 memavail=578532 print_time=7450.358 buffer_time=0.000 print_stall=0 extruder: target=235 temp=235.1 pwm=0.480 Attempting MCU 'mcu' reset webhooks client 547834199632: Disconnected Restarting printer Start printer at Tue Feb 18 11:56:19 2025 (1739879779.2 7525.1) ===== Config file ===== [virtual_sdcard] path = ~/printer_data/gcodes on_error_gcode = CANCEL_PRINT` Randomly losing connecting to Klipper mid-print, only thing to do is a power cycle. From the log itself, it seems like the MCU resets itself. GPT has suggested that it is likely to experience communication issue. This started recently after updating the softwares. Anybody experiencing this as well? ---
**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:** [February 19, 2025, 4:13am UTC](https://klipper.discourse.group/t/mcu-restarts-randomly-mid-print/22079/2 "2025-02-19T04:13:32Z")
Hello @panasoloo ! Please attach the complete klippy.log file to your next post. It was requested. ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [April 20, 2025, 4:13am UTC](https://klipper.discourse.group/t/mcu-restarts-randomly-mid-print/22079/3 "2025-04-20T04:13:35Z")
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