# ESC Calibration Failed PX4

**URL:** <https://discuss.px4.io/t/esc-calibration-failed-px4/26550>\
**Category:** Uncategorized\
**Created:** [March 12, 2022, 6:10pm UTC](https://discuss.px4.io/t/esc-calibration-failed-px4/26550 "2022-03-12T18:10:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![eumeline22](https://discuss.px4.io/user_avatar/discuss.px4.io/eumeline22/32/10328_2.png) [@eumeline22](https://discuss.px4.io/u/eumeline22)\
**Post date:** [March 12, 2022, 6:10pm UTC](https://discuss.px4.io/t/esc-calibration-failed-px4/26550/1 "2022-03-12T18:10:21Z")

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Hi,  
I have a pixhawk 4 running through QGround control on windows 10, when I click on the summary, everything is green and seems to be set up, but my ESC’s aren’t set up, and I’m pretty sure they need to be. When I click ‘calibrate’ it says “calibration failed, battery unavailable” even though I have my battery plugged in.  
Can anyone help? This is my first time setting up a drone.