Multi-byte state values

RE: Multi-byte state values

Justin Reina — Mon, 28 Sep 2020 16:22:42 GMT

I found this useful -

Lower Transport Layer: (loc)

The lower transport layer takes PDUs from the upper transport layer and sends them to the lower transport layer on a peer device. Where required, it performs segmentation and reassembly of PDUs. For longer packets, which will not fit into a single Transport PDU, the lower transport layer will perform segmentation, splitting the PDU into multiple Transport PDUs. The receiving lower transport layer on the other device, will reassemble the segments into a single upper transport layer PDU and pass this up the stack.

thanks!

RE: Multi-byte state values

Justin Reina — Mon, 28 Sep 2020 16:06:57 GMT

Thank you for the clarity here, this cleans us up back into motion quickly, I appreciate the detail in your response!

We are on entry to mesh now and stumbled a little, SAR is a sensible and clear solution this works very well

RE: Multi-byte state values

Hung Bui — Tue, 22 Sep 2020 13:24:48 GMT

Hi Justin,

When the payload is over 11 bytes, the package is automatically transferred using SAR (segmented and assembly) packets. On the model/application layer you don't need to do anything to send longer payload size.

Please read more about the SAR packets in the Bluetooth Mesh spec. Especially this discussion: