# MCU disappear RUMBA32 AUS3d

**URL:** <https://klipper.discourse.group/t/mcu-disappear-rumba32-aus3d/10314>\
**Category:** General Discussion\
**Created:** [September 5, 2023, 11:31pm UTC](https://klipper.discourse.group/t/mcu-disappear-rumba32-aus3d/10314 "2023-09-05T23:31:06Z")\
**Posts on this page:** 2\
**Page:** 2

<div class="post-metadata">

**Author:** ![Tdmax](https://avatars.discourse-cdn.com/v4/letter/t/df705f/32.png) [@Tdmax](https://klipper.discourse.group/u/Tdmax)\
**Post date:** [September 11, 2023, 10:30pm UTC](https://klipper.discourse.group/t/mcu-disappear-rumba32-aus3d/10314/21 "2023-09-11T22:30:23Z")

</div>

```auto
[129555.012939] usb 1-1.3: new full-speed USB device number 17 using dwc_otg
[129555.159972] usb 1-1.3: New USB device found, idVendor=1d50, idProduct=6177, bcdDevice= 1.00
[129555.160007] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[129555.160023] usb 1-1.3: Product: stm32f446xx
[129555.160035] usb 1-1.3: Manufacturer: katapult
[129555.160047] usb 1-1.3: SerialNumber: 420040001551363131363530
[129555.165475] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device

```

i tried again …  
after that i made:  
sudo service clipper stop  
make flash FLASH\_DEVICE=/dev/ttyACM0  
and it works:

```auto
make flash FLASH_DEVICE=/dev/ttyACM0
  Flashing out/klipper.bin to /dev/ttyACM0
Entering bootloader on /dev/ttyACM0
Device reconnect on /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3: 1.0
/usr/bin/python3 lib/canboot/flash_can.py -d /dev/serial/by-path/platform-3f9800 00.usb-usb-0:1.3:1.0 -f out/klipper.bin

Attempting to connect to bootloader
CanBoot Connected
Protocol Version: 1.0.0
Block Size: 64 bytes
Application Start: 0x8008000
MCU type: stm32f446xx
Flashing '/home/pi/klipper/out/klipper.bin'...

[##################################################]

Write complete: 2 pages
Verifying (block count = 470)...

[##################################################]

Verification Complete: SHA = C838E1A2B16E0D99203AE489D3170672C297A02D
CAN Flash Success
pi@raspberrypi:~/klipper $ sudo service klipper start

```

then i modified config.cfg adding:

```auto
serial: /dev/serial/by-path/platform-3f980000.usb-usb-0:1.3:1.0

```

AND FINALLY NOW IT WORKS!!!

I honestly don’t know how to thank you for all the time you dedicated to me!  
thank you so much!

---

<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:** [October 12, 2023, 8:31am UTC](https://klipper.discourse.group/t/mcu-disappear-rumba32-aus3d/10314/22 "2023-10-12T08:31:19Z")

</div>

Closed on October 12, 2023, 8:31am UTC

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.

[Previous page](https://klipper.discourse.group/t/mcu-disappear-rumba32-aus3d/10314.md?page=1)