UART and mesh

RE: UART and mesh

Hung Bui — Wed, 15 Apr 2020 13:06:45 GMT

Update:

Example for UART in mesh: https://devzone.nordicsemi.com/f/nordic-q-a/59428/adding-uart-code-to-the-light-switch-server-project/241688#241688
Example for GATT proxy in coexistence example: devzone.nordicsemi.com/.../235538

RE: UART and mesh

tesc — Thu, 14 Nov 2019 12:02:51 GMT

Hi,

I am sorry for the delay. Hung is currently out-of-office and I will handle this thread while he is away.

The "UART data" is through BLE using the Nordic UART Service (NUS). With NUS, you send and receive data using RX and TX characteristics. You must connect to the device using BLE, for instance from a smartphone with nRF Connect, and then you can control the lights by writing numbers to the UART RX characteristic as described at the bottom of the "Testing the example" section of the SDK UART coexistence example documentation.

Regards,
Terje

RE: UART and mesh

Bilal — Fri, 08 Nov 2019 11:54:36 GMT

I want to run this example once. I build the solution. now I didn't understand how do I test this with Light switch example. like I have 4 DK's.

1. on one DK I have to burn uart coexist hax file.(is this works as a client switch?)

2. second DK as provisioner

3. remaining as server.

where i get the UART data?

RE: UART and mesh

Hung Bui — Fri, 08 Nov 2019 11:45:56 GMT

What exactly you mean "to test uart coexist example" ?

- Can you do normal mesh with it (provision it with the provisioner in the light switch example) and then turn off an on the light with it

- Can you do uart with the phone with it ?

RE: UART and mesh

Bilal — Fri, 08 Nov 2019 09:24:53 GMT

I did this, It is working fine.

will you help me in uart coexist example. I want test it. I did all things which is given in doc. I build the solution error free.

Now please refer any document or tell me. How do I test uart coexist example. I have two 840 DK's and 2 832 Dk's.

RE: UART and mesh

Hung Bui — Fri, 08 Nov 2019 09:13:12 GMT

You can base your application on the light switch example. You can use the phone app to do provisioning and to turn off and on the light.

RE: UART and mesh

Bilal — Fri, 08 Nov 2019 08:28:29 GMT

My requirement is control a mesh network with smartphone app . a node have multi-function node like switch, PWM and position (52833) etc .

will uart coexits works in my case or not?

RE: UART and mesh

Hung Bui — Fri, 08 Nov 2019 08:10:19 GMT

What exactly is your requirement ?

The purpose of the ble_app_uart_coexist example is to do a normal BLE application and mesh at the same time (not provisioning via a phone or working as a proxy node).

RE: UART and mesh

Bilal — Fri, 08 Nov 2019 05:14:45 GMT

Hi Hung Bui,

Thanks for your reply,

Ok, if I use provisioner like used in light switch example. then what is the use of UART in coexist example?.

and second thing. if we do the code modification, will it work for my requirement?

RE: UART and mesh

Hung Bui — Thu, 07 Nov 2019 12:12:04 GMT

Hi Bilal,

The ble_app_uart_coexist doesn't have PB-GATT role supported (provisioning via BLE). The reason is quite obvious, it was made so that it will be ble_app_uart and mesh at the same time, not with proxy role.

So there are two options:

1. Provision the node using a provisioner via PB-ADV (like the provisioner in the light switch example, or the PyACI)

2. Either disable ble_app_uart at the beginning and enable the proxy role to do provisioning, or you can think of combining UART service and the PB-GATT service together. But this approach would need quite a lot of code modification and understanding of the code.