Can't send dynamically allocated array over bluetooth mesh

[Sisimi]

Hello everyone!

I'm new to bluetooth mesh or even to C programming and i don't understand the following:

I want to send messages over Bluetooth Mesh from an nRF52840 to another, to do this i used the light_switch example and modified the "send_reliable_message()" method inside "simple_on_off_client.c".
I have no problem with sending simple variable or a constant string array but if i declare an array dynamically and fill it with info that i want to send to the server, the server dont get the right data.   

Example:

The above image shows what inside the puffer that is sent over the mesh.
What i cant understand is that why can i send something like this: const char payload[5] = "Hello", but cant send the above? Am i missing something here?

Thank you for the help in advance.

Specifics:
Development software, with versions: SDKs = NordicMeshSDK_2.0.1, nRF5_SDK_15.0.0; IDE = SEGGER 3.34, SoftDevice = s140
Computer platform, with versions: Windows 10 with spring update
Hardware revisions: nRF52840

[Hung Bui]

Hi , 

 

The access layer wouldn't copy the buffer into its own buffer, so the data you provide need to keep its value even after you get out of the function. You would need to use a static array here.