adding BLE testing info.

applications/protocols_serialization/user_guide.md

@@ -1,25 +1,56 @@
 # Protocols serialization applications testing
+- [Protocols serialization applications testing](#protocols-serialization-applications-testing)
+  - [Overview](#overview)
+  - [Setting up nRF Connect SDK](#setting-up-nrf-connect-sdk)
+  - [Install NCS](#install-ncs)
+  - [Building application](#building-application)
+  - [Flashing and connecting](#flashing-and-connecting)
+  - [Testing](#testing)
+    - [Testing BLE](#testing-ble)
+    - [Testing OpenThread](#testing-openthread)
 
 ## Overview
 
+## Setting up nRF Connect SDK
 
+## Install NCS
+Please see:
+https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.6.0/nrf/installation/install_ncs.html
 
-## Setting up nRF Connect SDK
+To initialize nrf belov command instead the one mentioned in instruction:
 
-Install NCS
+`west init -m https://github.com/nrfconnect/sdk-nrf --mr collab-serial-ble-ot`
 
 ## Building application
 
-
 ## Flashing and connecting
 
 ## Testing
 
+### Testing BLE
+
+In order to test BLE You will need to install `nRF Connect for Mobile`
+
+ - IOS: https://apps.apple.com/pl/app/nrf-connect-for-mobile/id1054362403
+
+ - Android: https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp&pcampaignid=web_share
+
+On client site please invoke in zephyr shell:
+```console
+ > bt init
+ > bt advertise on
+```
+
+On mobile Phone open `nRF Connect` app and scan for: `Nordic_UART_Service` as in image below.
+
+![alt text](resources/nrf_scan.jpg){height=400px width=500px}
 
-###
+Tap connect.
 
-Testing BLE
+This will connect to nRF52 and You should be able to see in zephyr Shell similar message:
 
-###
+```
+LE conn param updated: int 0x0027 lat 0 to 42
+```
 
-Testing OpenThread
+### Testing OpenThread