nRF5 SDK for Mesh v2.2.0: Light Switch Demo - Where Next?

Question

So I have successfully built & deployed the Light Switch Demo - and it works. 
 
 But where do we go next? 
 The documentation seems far too close-in focussed on the microscopic details of functions, types, etc - I can't see anything which gives a macroscopic overview of how to create a system. 
 It's like a car handbook which describes each cog in the gearbox in fine details - but doesn't tell you how to drive the car! 
 
 For example, the Server controls just 1 LED on the DK. 
 How would we expand that to give independent control of all 4 LEDs? 
 In BT Mesh terminology, I think that would mean making each LED an "Element" ? 
 So how would we instantiate these - as instances of the Generic On/Off model?

Bjørn Kvaale · Accepted Answer

I realize this is 4 months too late, but better late than never. I have created an example showing how you can create two generic on off server models with one element each. That way, it is possible to provision & configure the server example from the nRF Mesh smartphone app & control the LEDs 1 & 2 from the app itself. Unfortunately, there is a bug at the moment in the iOS app, which means that the state set message only gets sent to the first on off server unicast address & never to the second one. 
 However, this works fine with the Android nRF Mesh app. 
 I made a copy of the generic on off server light switch example from mesh sdk v3.1.0. The main changes were the following: 
 - increased the ACCESS_MODEL_COUNT & ACCESS_ELEMENT_COUNT by one since I have added an extra element. The ACCESS_SUBSCRIPTION_LIST_COUNT has also been increased by one. All of these defines are found in nrf_mesh_config_app.h. 
 - in main.c, I added another APP_ONOFF_SERVER_DEF() for the second on off server model 
 - also changed the app_onoff_server_set_cb() to either change the LED state of LED 0 or LED 1 depending on which server model state is changed 
 - app_model_init() has also been updated to initialize two generic on off models instead of one. 
 I have added a comment //added by BK behind each line I have changed, so it should be easy to make search for the different changes. 
 In nRF Mesh, just provision & configure the node similar to this Youtube video , find the first server model, bind the app key & then change the state at the bottom of the same window. The same procedure applies for the second on off server model. 
 I would recommend to run a debug session by pressing F5 to get additional logging info in SES. 
 Unfortunately, I was unable to upload the zip file to DevZone, but I found a workaround . I have only tested on a 52832 DK. 
 Just unzip the folder like this: nrf5_SDK_for_Mesh_v3.1.0_src\examples\light_switch\server_4_generic_on_off 
 It should then look similar to this:

nRF5 SDK for Mesh v2.2.0: Light Switch Demo - Where Next?

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