# Servomotor communication

**URL:** <https://discuss.px4.io/t/servomotor-communication/26147>\
**Category:** PX4 Autopilot\
**Created:** [February 11, 2022, 9:33am UTC](https://discuss.px4.io/t/servomotor-communication/26147 "2022-02-11T09:33:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![benoitarguelle](https://discuss.px4.io/user_avatar/discuss.px4.io/benoitarguelle/32/10161_2.png) [@benoitarguelle](https://discuss.px4.io/u/benoitarguelle)\
**Post date:** [February 11, 2022, 9:33am UTC](https://discuss.px4.io/t/servomotor-communication/26147/1 "2022-02-11T09:33:50Z")

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Hello,

I just bought servomotors MD250TW and MD950TW from Hitec to mount on a drone, on which I use a Pixhawk 5 with PX4 for overall control. these servos have multiple modes Can Bus standard 2.0A, 2.0B and UAVCAN.

I read somewhere that the UAVCAN mode was not compatible with PX4. So I ask to be sure if there is any way to make my servos communicate with my Pixhawk. And how to make them communicate ?

Thanks

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**Author:** ![federico\_piccardo](https://discuss.px4.io/user_avatar/discuss.px4.io/federico_piccardo/32/10586_2.png) [@federico\_piccardo](https://discuss.px4.io/u/federico_piccardo)\
**Post date:** [April 27, 2022, 12:35pm UTC](https://discuss.px4.io/t/servomotor-communication/26147/2 "2022-04-27T12:35:18Z")

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I actually have the same problem, i can control the servos on the QgroundControl app manually (one by one), but when i try to control them with the radio, there is no movement of the servos. I wonder if there is specific parameters to be changed on the QgroundControl side to make the servos actually move?