# Libcanard for UAVCAN/CAN v1 is released

**URL:** <https://forum.opencyphal.org/t/libcanard-for-uavcan-can-v1-is-released/774>\
**Category:** Libcanard\
**Created:** [March 8, 2020, 4:07am UTC](https://forum.opencyphal.org/t/libcanard-for-uavcan-can-v1-is-released/774 "2020-03-08T04:07:49Z")\
**Posts on this page:** 1\
**Showing post:** 11

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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:** [April 21, 2020, 1:44pm UTC](https://forum.opencyphal.org/t/libcanard-for-uavcan-can-v1-is-released/774/11 "2020-04-21T13:44:14Z")

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> [@PetervdPerk](#):
>
> Is there a particular reason why canardRxAccept and rxSessionUpdate does not return the error codes which are the cause of the problem while in the code the cause is clear?

Because the states you mentioned are not errors.

> [@Libcanard usage questions](https://forum.opencyphal.org/t/libcanard-usage-questions/933/3):
>
> okay, since i developed version1 canard for mpc micro-controller do i need any zubax babel (as recommended for version 0)for testing purpose or i can test as explained in README.

You can use any CAN hardware. Our libraries are platform-agnostic.

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