OTS Peripheral Example Data Reading Issue

RE: OTS Peripheral Example Data Reading Issue

VitalityVH — Thu, 13 Mar 2025 08:57:41 GMT

Hey! I ended up creating a custom service which sends the data in chunks over a notify characteristic. Since the OTC & OTS logic is not that concurrent when using it with an external device such as a phone or computer OSes.

RE: OTS Peripheral Example Data Reading Issue

brave_niuniu — Thu, 13 Mar 2025 08:29:21 GMT

Hello, I'm facing the exact same issue as you. I referenced OTC's sample code to read data by OACP, gatt write "0x050000000032000000", but I'm also getting the BT_GATT_OTS_OACP_RES_CHAN_UNAVAIL(0x06) error. Have you resolved this issue?

RE: OTS Peripheral Example Data Reading Issue

Edvin — Mon, 03 Feb 2025 09:37:58 GMT

Hello,

This is Zephyr's sample and Bluetooth Service implementation. I don't know exactly how it is supposed to work. The thing, however, is that there is no standard implementation of this in phones or computer OSes, so you still need to implement this on the app side. Keeping that in mind, there is not much separating this from e.g. the Nordic UART sample implemenation, other than that the OTS service uses L2CAP directly instead of GAP/GATT/ATT. Since there is very little documentation on this zephyr sample, I am afraid they would need to explain how to use it.

It does however seem to be a central OTC (Object Transfer Client) sample in Zephyr. Perhaps you can study this. Unfortunately, the documentation for this is also quite sparse.

If it proves difficult, you can probably achieve what you want to do using a custom protocol and e.g. the Nordicu UART Service, and transfer the data in chunks.

Best regards,

Edvin