[nrfconnect] samples: docs revised by a technical writer.

Signed-off-by: Marcin Kajor <marcin.kajor@nordicsemi.no>

examples/window-app/nrfconnect/Kconfig

@@ -1,5 +1,5 @@
 #
-#    Copyright (c) 2021 Project CHIP Authors
+#    Copyright (c) 2022 Project CHIP Authors
 #
 #    Licensed under the Apache License, Version 2.0 (the "License");
 #    you may not use this file except in compliance with the License.

examples/window-app/nrfconnect/README.md

@@ -92,10 +92,8 @@ with other Thread devices in the network.
 ### Device Firmware Upgrade
 
 The example supports over-the-air (OTA) device firmware upgrade (DFU) using
-available method:
-
--   Matter OTA update that is mandatory for Matter-compliant devices and enabled
-    by default
+the Matter OTA update, which is mandatory for Matter-compliant devices and enabled
+by default.
 
 For this method, the
 [MCUboot](https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/mcuboot/index.html)
@@ -177,15 +175,16 @@ following states are possible:
 -   _Solid On_ — The device is fully provisioned and has full Thread
     network and service connectivity.
 
-**LED 2** brightness indicates the shutter lift position
-
--   the brightness changes in range 0-255, where 0 means fully opened shutter
-    and 255 means fully closed shutter (lift)
-
-**LED 3** brightness indicates the shutter tilt position
+**LED 2** indicates the lift position of the shutter, which is represented by the
+brightness of the LED. The brightness level ranges from 0 to 255, where the
+switched off LED with brightness level 0 indicates a fully opened shutter (lifted)
+and 255 indicates a fully closed shutter (lowered).
 
--   the brightness changes in range 0-255, where 0 means fully opened shutter
-    and 255 means fully closed shutter (tilt)
+**LED 3** indicates the tilt position of the shutter, which is represented by the
+brightness of the LED. The brightness level ranges from 0 to 255, where the
+switched off LED with brightness level 0 indicates a fully opened shutter (tilted
+to a horizontal position) and 255 indicates a fully closed shutter (tilted
+to a vertical position).
 
 **Button 1** can be used for the following purposes:
 
@@ -200,29 +199,26 @@ following states are possible:
     [Building with Device Firmware Upgrade support](#building-with-device-firmware-upgrade-support)
     instruction.
 
-**Button 2** and **Button 3** — pressed together at the same time switch
-the mode of the shutter movement between lift and tilt; by default, after the
-device reset, the mode is set to lift.
+**Button 2** — Pressing the button once moves the shutter towards the open
+position by one step. Depending on the current movement mode, the button decreases
+the brightness of **LED2** for the lift mode and **LED3** for the tilt mode.
 
-**Button 2** — pressed alone once, steps the shutter towards the open
-position. Depending on the current movement mode, it decreases the brightness of
-LED2 for lift mode and LED3 for tilt mode.
+**Button 3** — Pressing the button once moves the shutter towards the closed
+position by one step. Depending on the current movement mode, the button increases
+the brightness of **LED2** for the lift mode and **LED3** for the tilt mode.
 
-**Button 3** — pressed alone once, steps the shutter towards the close
-position. Depending on the current movement mode, it increases the brightness of
-LED3 for lift mode and LED3 for tilt mode.
+**Button 2** and **Button 3** — Pressing both buttons at the same time toggles
+the shutter movement mode between lift and tilt. After each device reset,
+the mode is set to lift by default.
 
 > **Note**:
 >
-> There are 20 steps needed to fully close the shutter from fully opened
-> position, and vise versa (each step takes approximately 200 ms, which aims to
-> simulate the real shutter movement). This means that, for instance, **Button
-> 2** needs to be pressed 20 times to fully lift the shutter and to cover the
-> whole range of **LED 2** brightness step by step. Note that the shutter
-> positions and brightness of **LED 2** and **LED 3** are stored in non-volatile
-> memory and are restored after every device reset. After the firmware update,
-> by default both LEDs are switched off, which corresponds to the shutter being
-> fully open, both lift-wise and tilt-wise.
+> Completely opening and closing the shutter requires 20 button presses (steps).
+> Each step takes approximately 200 ms to simulate the real shutter movement.
+> The shutter position and LED brightness values are stored in non-volatile
+> memory and are restored after every device reset. After the firmware update
+> or factory reset both LEDs are switched off by default, which corresponds
+> to the shutter being fully open, both lift-wise and tilt-wise.
 
 **Button 4** — Pressing the button once starts the NFC tag emulation and
 enables Bluetooth LE advertising for the predefined period of time (15 minutes
@@ -471,12 +467,12 @@ Before you start testing the application, you can select one of the build types
 supported by the sample. This sample supports the following build types,
 depending on the selected board:
 
--   debug -- Debug version of the application - can be used to enable additional
+-   debug — Debug version of the application - can be used to enable additional
     features for verifying the application behavior, such as logs or
     command-line shell.
--   release -- Release version of the application - can be used to enable only
+-   release — Release version of the application - can be used to enable only
     the necessary application functionalities to optimize its performance.
--   no_dfu -- Debug version of the application without Device Firmware Upgrade
+-   no_dfu — Debug version of the application without Device Firmware Upgrade
     feature support - can be used only for the nRF52840 DK and nRF5340 DK, as
     those platforms have DFU enabled by default.
 

examples/window-app/nrfconnect/boards/nrf5340dk_nrf5340_cpuapp.overlay

@@ -1,5 +1,5 @@
 /*
- *    Copyright (c) 2021 Project CHIP Authors
+ *    Copyright (c) 2022 Project CHIP Authors
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

examples/window-app/nrfconnect/overlay-low_power.conf

@@ -1,5 +1,5 @@
 #
-#    Copyright (c) 2021 Project CHIP Authors
+#    Copyright (c) 2022 Project CHIP Authors
 #
 #    Licensed under the Apache License, Version 2.0 (the "License");
 #    you may not use this file except in compliance with the License.