# AUX control ftom mavros, without pertubing the multicopter itself

**URL:** <https://discuss.px4.io/t/aux-control-ftom-mavros-without-pertubing-the-multicopter-itself/2885>\
**Category:** Uncategorized\
**Created:** [March 28, 2017, 8:38am UTC](https://discuss.px4.io/t/aux-control-ftom-mavros-without-pertubing-the-multicopter-itself/2885 "2017-03-28T08:38:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![AlexisTM](https://discuss.px4.io/user_avatar/discuss.px4.io/alexistm/32/3456_2.png) [@AlexisTM](https://discuss.px4.io/u/AlexisTM)\
**Post date:** [March 28, 2017, 8:38am UTC](https://discuss.px4.io/t/aux-control-ftom-mavros-without-pertubing-the-multicopter-itself/2885/1 "2017-03-28T08:38:37Z")

</div>

Dear,

I would like to send a Actuator command to activate a magnetic gripper from Mavros, without sending the Pitch, yaw, roll. There is a `group_mix` enum in the Mavlink message (as well as in Mavros) but it looks not implemented in the PX4 Firmware.

Mavros message : [http://docs.ros.org/api/mavros\_msgs/html/msg/ActuatorControl.html](http://docs.ros.org/api/mavros_msgs/html/msg/ActuatorControl.html)

PX4 Firmware implementation [https://github.com/PX4/Firmware/blob/b2d47adf56cc2157659945afd241aeffdec320b3/src/modules/mavlink/mavlink\_receiver.cpp#L988-L1057](https://github.com/PX4/Firmware/blob/b2d47adf56cc2157659945afd241aeffdec320b3/src/modules/mavlink/mavlink_receiver.cpp#L988-L1057)

What is the correct way to do control AUX channels?