# PWM app in nutshell doesn't change PWM values

**URL:** <https://discuss.px4.io/t/pwm-app-in-nutshell-doesnt-change-pwm-values/5682>\
**Category:** PX4 Autopilot\
**Created:** [February 10, 2018, 6:34am UTC](https://discuss.px4.io/t/pwm-app-in-nutshell-doesnt-change-pwm-values/5682 "2018-02-10T06:34:04Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![Evaneee](https://discuss.px4.io/letter_avatar_proxy/v4/letter/e/85f322/32.png) [@Evaneee](https://discuss.px4.io/u/Evaneee)\
**Post date:** [May 30, 2019, 4:20am UTC](https://discuss.px4.io/t/pwm-app-in-nutshell-doesnt-change-pwm-values/5682/6 "2019-05-30T04:20:12Z")

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same question but I find it that

`mc_att_control stop`  
`fw_att_control stop`  
`motor_ramp sine 1100 0.5`

and then  
`pwm test -a -p 1100`  
will be in effect

I dont konw why  
wish you to find the reason

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