# MCU 'rpi' error during config: Unable to open spi device (CB1)

**URL:** <https://klipper.discourse.group/t/mcu-rpi-error-during-config-unable-to-open-spi-device-cb1/13813>\
**Category:** General Discussion\
**Created:** [February 4, 2024, 11:14am UTC](https://klipper.discourse.group/t/mcu-rpi-error-during-config-unable-to-open-spi-device-cb1/13813 "2024-02-04T11:14:55Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Kep1er-51](https://avatars.discourse-cdn.com/v4/letter/k/a183cd/32.png) [@Kep1er-51](https://klipper.discourse.group/u/Kep1er-51)\
**Post date:** [February 4, 2024, 11:14am UTC](https://klipper.discourse.group/t/mcu-rpi-error-during-config-unable-to-open-spi-device-cb1/13813/1 "2024-02-04T11:14:55Z")

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### Basic Information:

Printer Model: ender 3  
 MCU / Printerboard: CB1 / bigtreetech manta e3ez  
 `klippy.log` [klippy.log](https://klipper.discourse.group/uploads/short-url/wf2Jm9sTeP7gC63XDxqozSZWyle.log) (16.8 KB)

Hi all, I have a problem with adxl345 (right now I’m just getting my printer ready to work with it, because I don’t have it on hand)

 ![Снимок экрана 2024-02-04 132500](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/6/6a4088dc418027e5d76972c96e942fafb8565cbb.png)  
when trying to run with this config  
[adxl345.cfg](https://klipper.discourse.group/uploads/short-url/kc6biJ6OcZBlqFj1wFD1jXqaKQ7.cfg) (288 Bytes).  
I figured out that the error is caused by [adxl345].  
what am I doing wrong?

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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:** [February 4, 2024, 11:44am UTC](https://klipper.discourse.group/t/mcu-rpi-error-during-config-unable-to-open-spi-device-cb1/13813/2 "2024-02-04T11:44:10Z")

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The file adxl345.cfg does not appear within your sprinter.cfg.  
Neither with a [include] command nor as code.

Are you sure the klippy.log is recent?

The error does not appear inside the log.

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**Author:** ![Kep1er-51](https://avatars.discourse-cdn.com/v4/letter/k/a183cd/32.png) [@Kep1er-51](https://klipper.discourse.group/u/Kep1er-51)\
**Post date:** [February 4, 2024, 12:41pm UTC](https://klipper.discourse.group/t/mcu-rpi-error-during-config-unable-to-open-spi-device-cb1/13813/3 "2024-02-04T12:41:42Z")

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HI  
I did a little tinkering with the settings and now it looks like this:  
[klippy (1).log](https://klipper.discourse.group/uploads/short-url/wlYTOZAvjoxejNcvbVmjpVbm63d.log) (218.6 KB)  
 ![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/7/7850d5c2e4dec672e882b8b0420fd4c66160fa4c.png)  
adxl345.cfg incluв in printer.cfg

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**Author:** ![Kep1er-51](https://avatars.discourse-cdn.com/v4/letter/k/a183cd/32.png) [@Kep1er-51](https://klipper.discourse.group/u/Kep1er-51)\
**Post date:** [February 4, 2024, 12:45pm UTC](https://klipper.discourse.group/t/mcu-rpi-error-during-config-unable-to-open-spi-device-cb1/13813/4 "2024-02-04T12:45:41Z")

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if i raplace ‘gpio74’ with ‘None’, it doesn’t go into error.

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [April 4, 2024, 12:46pm UTC](https://klipper.discourse.group/t/mcu-rpi-error-during-config-unable-to-open-spi-device-cb1/13813/5 "2024-04-04T12:46:28Z")

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