# Level Calibration (Attitude Esitmator not running) **URL:** \ **Category:** QGroundControl\ **Created:** [May 12, 2020, 2:14pm UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691 "2020-05-12T14:14:45Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Andy\_Cross](https://discuss.px4.io/user_avatar/discuss.px4.io/andy_cross/32/6247_2.png) [@Andy\_Cross](https://discuss.px4.io/u/Andy_Cross)\ **Post date:** [May 12, 2020, 2:14pm UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/1 "2020-05-12T14:14:45Z")
Please help as I am unable to get out of this issue of the Estimator not running BR Andy Cross ![image](https://discuss.px4.io/uploads/default/original/2X/d/d3b3d1036b8af5c0317f71094a2c508370339e12.png) ---
**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\ **Post date:** [May 13, 2020, 6:44am UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/2 "2020-05-13T06:44:32Z")
Odd. What hardware are you using? And what version of PX4? ---
**Author:** ![Andy\_Cross](https://discuss.px4.io/user_avatar/discuss.px4.io/andy_cross/32/6247_2.png) [@Andy\_Cross](https://discuss.px4.io/u/Andy_Cross)\ **Post date:** [May 13, 2020, 10:31am UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/3 "2020-05-13T10:31:06Z")
Hi I have a brand new Pixhawk 4 mini (one month old) Firmware in the attached picture, and Airframe is “Standard plane”. with PX4 Pro 1.10.1 stable release I have also tried the Ardupilot with Pixhawk mini 4 firmware but this ends up with a “Baro unable to initialise driver”. Best regards Andy ![image](https://discuss.px4.io/uploads/default/original/2X/7/76216aa021e81ebd67aba11b32d39948988483f1.png) ---
**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\ **Post date:** [May 13, 2020, 12:51pm UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/4 "2020-05-13T12:51:39Z")
What’s the error when you use PX4? The screenshot just shows the upgrade which seemed to pass, so I’m not sure what the issue is. ---
**Author:** ![Andy\_Cross](https://discuss.px4.io/user_avatar/discuss.px4.io/andy_cross/32/6247_2.png) [@Andy\_Cross](https://discuss.px4.io/u/Andy_Cross)\ **Post date:** [May 13, 2020, 1:09pm UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/5 "2020-05-13T13:09:11Z")
Hi its the message in the first screen shot popup message Alttitude Estimator not running and the calibration is halted Br Andy ---
**Author:** ![bresch](https://discuss.px4.io/user_avatar/discuss.px4.io/bresch/32/2343_2.png) [@bresch](https://discuss.px4.io/u/bresch)\ **Post date:** [May 13, 2020, 3:12pm UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/6 "2020-05-13T15:12:51Z")
Given the following message: > [@Andy\_Cross](#): > > "Baro unable to initialise driver” I would say that your baro isn’t working and this is why the estimator cannot start (it’s waiting for the baro data). ---
**Author:** ![Andy\_Cross](https://discuss.px4.io/user_avatar/discuss.px4.io/andy_cross/32/6247_2.png) [@Andy\_Cross](https://discuss.px4.io/u/Andy_Cross)\ **Post date:** [May 14, 2020, 9:40am UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/7 "2020-05-14T09:40:48Z")
As you said about the Baro not working should the the “Pressure\_Alt” be showing a reading as it 's at 0 is this a further indicator that it’s not working ? ![image](https://discuss.px4.io/uploads/default/original/2X/6/66e69ed0228eea3acdfaeb87b918d5492f7de84a.png) ---
**Author:** ![bresch](https://discuss.px4.io/user_avatar/discuss.px4.io/bresch/32/2343_2.png) [@bresch](https://discuss.px4.io/u/bresch)\ **Post date:** [May 18, 2020, 6:12am UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/8 "2020-05-18T06:12:40Z")
> [@Andy\_Cross](#): > > As you said about the Baro not working should the the “Pressure\_Alt” be showing a reading as it 's at 0 is this a further indicator that it’s not working ? Yes, that’s what you should have: ![DeepinScreenshot_select-area_20200518081136](https://discuss.px4.io/uploads/default/original/2X/5/5c709105169682fe5e6308b4de82086e7c02bfdc.png) ---
**Author:** ![Andy\_Cross](https://discuss.px4.io/user_avatar/discuss.px4.io/andy_cross/32/6247_2.png) [@Andy\_Cross](https://discuss.px4.io/u/Andy_Cross)\ **Post date:** [May 25, 2020, 8:54am UTC](https://discuss.px4.io/t/level-calibration-attitude-esitmator-not-running/16691/9 "2020-05-25T08:54:41Z")
Yes thanks for this the PX4 mini was broken new one has resolved the issue thanks for your time