Model View Controller Architecture on Embedded System

I want to design our embedded system application according to MVC pattern.But I couldn't decide where to implement the application modules.

I will process some signals and send some output to computer via tcp/ip for user interface and write same outputs to database.

• Where should I implement database operations?
• Should I write ui and database data to same model class?
• Should I implement communication class in View part?

Can you help about this problem and give me same advice?