NRF5340 Peripheral ISO - unable to register ISO server

[GatCode]

There already exists a question in the DevZone regarding this error but a lot of time has passed and maybe there is already a solution out there.

Basically, I want to execute the Zephyr Peripheral ISO Sample on a NRF5340dk but I always get the "Unable to register ISO server (err -134)" error. I know that the hci_rpmsg on the netcore has to have the right kconfig defines enabled - but what are these? I tried it with "CONFIG_BT_CTLR_PERIPHERAL_ISO=y" but still get the same error.

Can someone help me out? Thanks!

[Amanda Hsieh]

Hi, 

The error code 134 is ENOTSUP, and likely this is an example show-casing isochronous channels, which currently we do not yet have a stack available that supports isochronous channels. 

Regards,
Amanda

[GatCode]

Hi Amanda, thanks for the answer!

Yes but since Zephyr has this feature included, I thought it can be executed via the right kconfig options on the hci_rpmsg example which is running on the network core?

[Amanda Hsieh]

Hi, 

Same question on the zephyr discord ble channel: https://discord.com/channels/720317445772017664/733036837576376341/940543468487475231

Answer from Emil: ISO is not fully supported by the Zephyr Link Layer.

-Amanda

[GatCode]

Thank you Amanda, that's unfortunate.