# Subscribing to message type and src node ID

**URL:** <https://forum.opencyphal.org/t/subscribing-to-message-type-and-src-node-id/210>\
**Category:** LibCyphal\
**Created:** [October 22, 2018, 1:19pm UTC](https://forum.opencyphal.org/t/subscribing-to-message-type-and-src-node-id/210 "2018-10-22T13:19:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![deekay](https://forum.opencyphal.org/letter_avatar_proxy/v4/letter/d/8491ac/32.png) [@deekay](https://forum.opencyphal.org/u/deekay)\
**Post date:** [October 22, 2018, 1:19pm UTC](https://forum.opencyphal.org/t/subscribing-to-message-type-and-src-node-id/210/1 "2018-10-22T13:19:56Z")

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Hi!

In my application there are multiple nodes of same type, like multiple temperature sensors of the same type. Although they each has unique node id.

I am wondering if a node that subscribes to such message can “filter out” messages only from a particular node id? (without using CAN filters)

Or does the subscriber application need to collect all messages of that type and then ignore all node id:s not interesting?

Kind Regards

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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:** [October 22, 2018, 2:06pm UTC](https://forum.opencyphal.org/t/subscribing-to-message-type-and-src-node-id/210/2 "2018-10-22T14:06:14Z")

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> [@deekay](#):
>
> Or does the subscriber application need to collect all messages of that type and then ignore all node id:s not interesting?

Yes, currently this is the only possible approach in UAVCAN v0. In the first stable release we’re currently working on (termed UAVCAN v1.0), the case you’re describing will be supported much better. Here is an overview: [Stockholm Summit recap](https://forum.opencyphal.org/t/stockholm-summit-recap/170)

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**Author:** ![deekay](https://forum.opencyphal.org/letter_avatar_proxy/v4/letter/d/8491ac/32.png) [@deekay](https://forum.opencyphal.org/u/deekay)\
**Post date:** [October 25, 2018, 1:31pm UTC](https://forum.opencyphal.org/t/subscribing-to-message-type-and-src-node-id/210/3 "2018-10-25T13:31:37Z")

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Ok I see. Looking forward to the new features 😉