Check-Six Forums

First you need to go in the folder of the module: D:\yourPathToDCS\Mods\aircraft\MIG-21bis\Cockpit We will focus on three files:

devices.lua, which contains all the key to get the panel when the game is running, those keys must be added in a new class dedicated for that, here it will be : MiG-21Bis_Devices.java but don't do it for now, Keep these values saved somewhere, you will use them in the Android part (Interaction)
clickabledata.lua and mainpanel_init.lua, you will find here the IDs to get values, they will be used in the Cockpit++.lua to transfer their values to the phone, first is for buttons, second for light (at least for the Mig21)
command_defs.lua, here you will get the IDs to make an action on an element in the cockpit.