Uart solution among more ble modules

[David Petrov]

Light switch, client, server and app nRF Mesh works. I replaced client with ble_app_uart_coexist, but I already donť see it in your nRF Mesh app on my phone. I would like configure it, but I donť know how. My goal is create mesh network, where I connect to one node with help app Serial BLE Terminal in phone and send serial packet to all others nodes to uart in network/connection. I hope that is clear what I think, create wireless system what transciver serial data, no problem when it will be low speed. In the best case send serial data to specific node in mesh network. Programmig is quite time consuming. Maybe great thing would be to have existing Mesh system able configurate with help AT commands. Example: app Serial BLE Terminal send serial packet "0x01, 0x02, ..." and I see it on uarts on others three BLE device. And when it would go with help AT commands configure name and password "mesh network" It would by great.

[David Petrov]

Hi, it sounds like paradise music :-) I tried send data from app ble terminal via generic onoff client, it works. But I would appreciated you show me way or example from which I can be inspirate. I suppose, that is possible take model generic onoff, rename it and do something chages for uart model, right?

[Hung Bui]

I would suggest to get started with the simple_on_off model. We provide the model in \models\vendor\simple_on_off. Documentation is here : https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.meshsdk.v4.0.0/md_models_vendor_simple_on_off_README.html?cp=7_2_2_3_1

Your job is to integrate this to the light switch example (you can choose to remove the generic on off if you want) 

After you have the simple on off working, you can easily convert it to do UART data. 

[David Petrov]

Just for information, if I change simple onoff is possible send and receive cmd bigger than 1 byte? For example packet with 64B?

[Hung Bui]

Yes you can. But Bluetooth Mesh is not designed for long packet. The actual payload on a mesh packet is 11 bytes. Longer data is segmented automatically by the mesh stack and transferred by multiple packets. 

[David Petrov]

Thank you very much for information. Please, could you send me examples with implemented uart model client and server with coexist GATT for them. I have two nrf52832 dk and I would very appreciated this help. I think it should be good base for me.