bt_mesh_model_pub::msg field

Publication buffer, containing the publication message. The application is expected to initialize this with a valid os_mbuf pointer, with the help of e.g. the NET_BUF_SIMPLE() macro. The publication buffer must contain a valid publication message before calling the bt_mesh_model_publish() API or after the publication's bt_mesh_model_pub .update callback has been called and returned success. The buffer must be created outside of function context, i.e. it must not be on the stack. This is most conveniently acheived by creating it inline when declaring the publication context: static struct bt_mesh_model_pub my_pub = { .msg = NET_BUF_SIMPLE(size), };