# MCU shutdown with BTT CB1

**URL:** <https://klipper.discourse.group/t/mcu-shutdown-with-btt-cb1/8755>\
**Category:** General Discussion\
**Created:** [June 3, 2023, 9:06am UTC](https://klipper.discourse.group/t/mcu-shutdown-with-btt-cb1/8755 "2023-06-03T09:06:38Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![Nem0815](https://avatars.discourse-cdn.com/v4/letter/n/bc79bd/32.png) [@Nem0815](https://klipper.discourse.group/u/Nem0815)\
**Post date:** [June 6, 2023, 7:50pm UTC](https://klipper.discourse.group/t/mcu-shutdown-with-btt-cb1/8755/16 "2023-06-06T19:50:06Z")

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Just reinstalled to give it a try. When the printer is idle and does nothing it is ~1% CPU load.

However, when I open the Obico webpage and login or open the mobile app there is a short spike of up to 20% CPU load!

Same happens when refresh is pressed in the app.

When it is printing the CPU load of Obico toggles between 1 and 10% (seems pretty high to me), even when I don’t have the Obico page or app opened.

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