about nrf mesh:chat example

RE: about nrf mesh:chat example

Hieu — Wed, 04 Sep 2024 14:54:30 GMT

The struct bt_mesh_chat_cli* you use were never initialized. It is just null. This causes your use of bt_mesh_chat_cli_private_message_send() to be invalid and result in a fault.

You need to use a valid struct bt_mesh_chat_cli instance, such as that in model_handler.c.

RE: about nrf mesh:chat example

Muhammed — Wed, 04 Sep 2024 14:44:14 GMT

RE: about nrf mesh:chat example

Muhammed — Tue, 27 Aug 2024 16:35:13 GMT

I also installed k_work structure, unfortunately bluetooth disconnects every time.

RE: about nrf mesh:chat example

Muhammed — Mon, 26 Aug 2024 14:09:44 GMT

I've followed all your steps. I've set up a thread, but dont work.

Therefore,we are especially requesting help.

devzone.nordicsemi.com/.../chat_5F00_arastatek_5F00_V1.rar

RE: about nrf mesh:chat example

Hieu — Mon, 26 Aug 2024 12:01:08 GMT

Dear Muhammed and Ekmekci,

We can help you debug your project when necessary. However, I must politely point out that you haven't examined all the suggestions that I have made yet.

The fact that the receiving behavior is working correctly is good information. That indicates that the issue lies with the sending.

Then it is only a matter of testing whether the button works like you expect it to or not. A major part of my reply points out common issues when dealing with buttons and calling potentially blocking APIs.

Please go over them first.

Best regards,

Hieu

RE: about nrf mesh:chat example

Ekmekci — Thu, 22 Aug 2024 08:44:29 GMT

Dear Hieu,
First of all thank you for your deep support.

Mr Muhammed is our Nordic FAE. His responsibility is only Nordic.
But sometimes there is topic we cannot go one step further.

In this case we really would like to your professional review.

This topic also we did many of research, we applied your all suggestions but we didnt go one step further.

Could you please review our code, i believe that with your professional point of view you will guide us faster.

Mr Muhammed is already attached our project file

Best regards,

RE: about nrf mesh:chat example

Muhammed — Thu, 22 Aug 2024 08:24:19 GMT

At the same time, when I write that function into the button interrupt, the bluetooth connection is interrupted.

RE: about nrf mesh:chat example

Muhammed — Wed, 21 Aug 2024 13:59:02 GMT

Hi,

When I write chat private 0x0001 hello over the terminal myself, the led lights up on all mesh devices. I'm sure the led part is working. It receives the message and lights the led. But when there is a button, it does not light when pressed. When I look at the button example, I see that the configuration is correct. I share the code with you.

devzone.nordicsemi.com/.../chat_5F00_arastatek.rar

Would you test code please.

RE: about nrf mesh:chat example

Hieu — Wed, 21 Aug 2024 12:28:26 GMT

In this case, bt_mesh_chat_cli_private_message_send() is the right function to use.

There are several places that things could go wrong here. Here are two things that people commonly overlook:

The DK LED is active low, meaning that it lights up when you set it low.
Check carefully how the LEDs are setup, from hardware to Devicetree to driver API usage.
The button input could bounce, leading to repeated calling of the interrupt function.

Note that I am not claiming it's definitely one of those two issues. It could be something else.

I strongly suggest you adopt an incremental development approach, start from the unmodified sample, add, and test each small feature at a time. Here is the order of addition I would suggest:

Setup button with debouncing and handler
1. The DK Buttons and LEDs library provide native button debouncing
  The Mesh samples make use of this library and can serve as a good usage sample
Setup LEDs
Confirm sending message works
Setup sending Chat message to trigger upon button press
1. It's a good practice to just raise a flag or queue a job in the button handler, not actually executing the job there. The job could be blocking, causing system timing issues
2. Confirm via logging that the other end receives the message
Add LED behavior to message handling

RE: about nrf mesh:chat example

Muhammed — Tue, 20 Aug 2024 09:35:28 GMT

No, I want to send a message. For example, to send a "Hello" message and take the action I want.

I want to send messages to devices that are grouped in Mesh:Chat software

RE: about nrf mesh:chat example

Hieu — Tue, 20 Aug 2024 08:46:43 GMT

Hi mhakbilen,

Is your goal having the behavior of "pressing one button on a node turns on the light on another," or is your goal evaluating the customization of the Mesh: Chat sample?

If your goal is the button-light behavior, then please look into the Bluetooth Mesh: Light switch and Bluetooth Mesh: Light samples. They use the Generic OnOff Client and Server and are the intended way to achieve that behavior.

Hieu