Using Simple message model.

Question

Hi, 
 I have certain doubts regarding simple message model . 
 1. Why simple_message_client_init or simple_message_server_init is never used? Don't we need this function to bind model to the element? 
 2. I am sending a message from client to server. Can I receive it from simple_message_server.c and vice versa? 
 3. I could not understand how the model's functions can be used and how the communication takes place.

Bjørn Kvaale · Accepted Answer

What about if you create a new model based off of the simple on off model instead? If you take a look at the light switch client example, you can see that when a user presses button 1 on the dev kit, the client sends a unicast message to the first provisioned server using the simple_on_off_client_set() function. This function first makes sure that the parameter pointer p_client & the status_cb pointer are not null. Then, a check is done to make sure the client is not in an invalid state. 
 It's this struct that is interesting for us: 
 /** Simple OnOff Client state structure. */
struct __simple_on_off_client
{
 /** Model handle assigned to the client. */
 access_model_handle_t model_handle;
 /** Status callback called after status received from server. */
 simple_on_off_status_cb_t status_cb;
 /** Timeout callback called after acknowledged message sending times out */
 simple_on_off_timeout_cb_t timeout_cb;
 /** Internal client state. */
 struct
 {
 bool reliable_transfer_active; /**< Variable used to determine if a transfer is currently active. */
 simple_on_off_msg_set_t data; /**< Variable reflecting the data stored in the server. */
 } state;
}; 
 The simple_on_off_msg_set struct contains the on_off state (i.e. whether the server light should be on or off). 
 The simple_on_off_client_set() function then calls send_reliable_message(), which will then send the data via the access_model_reliable_publish() call on the access layer of the mesh stack. 
 What if you try to create a new model based on the simple on off model & then update the simple_on_off_msg_set_t struct to send a string message instead of uint8_t on_off? 
 I would also recommend making a copy of each of the three light switch examples (provisioner, client, server) & modify those. This way, if you were to make a mistake & the mesh network does not work anymore, you can refer back on the working light switch example. Hope that helps!

Using Simple message model.

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