# PX4 do not response to my Dynamic node ID client

**URL:** <https://forum.opencyphal.org/t/px4-do-not-response-to-my-dynamic-node-id-client/1086>\
**Category:** LibCyphal\
**Created:** [January 25, 2021, 4:45pm UTC](https://forum.opencyphal.org/t/px4-do-not-response-to-my-dynamic-node-id-client/1086 "2021-01-25T16:45:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![RuslanUrya](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/ruslanurya/32/467_2.png) [@RuslanUrya](https://forum.opencyphal.org/u/RuslanUrya)\
**Post date:** [January 25, 2021, 4:45pm UTC](https://forum.opencyphal.org/t/px4-do-not-response-to-my-dynamic-node-id-client/1086/1 "2021-01-25T16:45:12Z")

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Hello. I created DynamicNodeIDClient on my device according to tutorial. It work with GUI Tool. But PX4 ignore my node and DynamicNodeIDClient spin.  
Does px4 any specific conditions for the DynamicNodeIDClient, that are not described in the tutorials? Or my program is incorrect?  
Thanks!

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**Author:** ![pavel.kirienko](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/pavel.kirienko/32/9_2.png) [@pavel.kirienko](https://forum.opencyphal.org/u/pavel.kirienko)\
**Post date:** [January 25, 2021, 8:00pm UTC](https://forum.opencyphal.org/t/px4-do-not-response-to-my-dynamic-node-id-client/1086/2 "2021-01-25T20:00:48Z")

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PX4-related questions are better asked on the PX4 forum:

> **[Dronecode Forum | Open Source Drone Development](https://discuss.px4.io/)**
>
> Ask, answer, and build with the open source drone community. Home for PX4, Pixhawk, QGroundControl, MAVSDK, and MAVLink developers, integrators, and researchers.

I think you just need to enable the UAVCAN node-ID allocation server on the PX4. IIRC it is done with `uavcan fw start` or something like that.

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**Author:** ![RuslanUrya](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/ruslanurya/32/467_2.png) [@RuslanUrya](https://forum.opencyphal.org/u/RuslanUrya)\
**Post date:** [January 25, 2021, 8:40pm UTC](https://forum.opencyphal.org/t/px4-do-not-response-to-my-dynamic-node-id-client/1086/3 "2021-01-25T20:40:00Z")

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Mode of uavcan is automatic sensors detection, uavcan is running. I remember the sdcard is not inserted. Think problem is there. If its’ true, I’m stupid. Tomorrow will try.

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**Author:** ![RuslanUrya](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/ruslanurya/32/467_2.png) [@RuslanUrya](https://forum.opencyphal.org/u/RuslanUrya)\
**Post date:** [January 26, 2021, 11:48am UTC](https://forum.opencyphal.org/t/px4-do-not-response-to-my-dynamic-node-id-client/1086/4 "2021-01-26T11:48:09Z")

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Yes, connecting of sd-card solved the problem. Node getting ID. Thanks for the attention(!!!) and sorry for the stupid post.