# Kobra 2 'mcu': Unable to connect **URL:** \ **Category:** General Discussion\ **Created:** [April 12, 2025, 8:23pm UTC](https://klipper.discourse.group/t/kobra-2-mcu-unable-to-connect/22981 "2025-04-12T20:23:04Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![brodieman](https://avatars.discourse-cdn.com/v4/letter/b/eb9ed0/32.png) [@brodieman](https://klipper.discourse.group/u/brodieman)\ **Post date:** [April 12, 2025, 8:23pm UTC](https://klipper.discourse.group/t/kobra-2-mcu-unable-to-connect/22981/1 "2025-04-12T20:23:04Z")
### Basic Information: Fisrt time using Klipper, mcu ‘mcu’: Unable to connect Printer Model: Kobra 2 MCU / Printerboard: Host / SBC Raspberry Pi 3 - running mainsailOS klippy.log [klippy (7).log](https://klipper.discourse.group/uploads/short-url/fceGPiszO3iit5HYovTE8ujEIv2.log) (192.9 KB) _Fill out above information and_ **_in all cases attach your_ `klippy.log` _file_** (use zip to compress it, if too big). _Pasting your_ `printer.cfg` _is **not** needed_ _ **Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there** _ ### Describe your issue: … Sorry Guys I am just lost at this point, I have been trying to follow these instructions, [https://crororo.blogspot.com/kobra2klipper](https://crororo.blogspot.com/kobra2klipper). I have been scouring forums looking for a fix or a suggestion of what to try next. Hopefully you guys can help me with the next thing to try. admin1@raspberrypi:~/klipper $ ls /dev/serial/by-id/\* /dev/serial/by-id/usb-1a86\_USB\_Serial-if00-port0 ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [June 11, 2025, 8:23pm UTC](https://klipper.discourse.group/t/kobra-2-mcu-unable-to-connect/22981/2 "2025-06-11T20:23:12Z")
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