Update serial console chapter

boards/beagleplay/demos-and-tutorials/using-serial-console.rst

@@ -3,3 +3,25 @@
 Using Serial Console
 ####################
 
+To see the board boot log and access your BeaglePlay's console you can connect a USB-UART  
+cable as dipicted in image below and use application like ``tio`` to access the conole.
+
+.. figure:: images/serial-debug-connection.jpg
+    :width: 1400
+    :alt: Serial debug (USB-UART) cable connection.
+
+    Serial debug (USB-UART) cable connection.
+
+If you are using Linux your USB to UART converter may appear as ``/dev/ttyUSB``. 
+It will be different for Mac and Windows operatig systems.
+
+.. code-block:: shell
+
+    [lorforlinux@fedora ~] $ tio /dev/ttyUSB0 
+    tio v2.5
+    Press ctrl-t q to quit
+    Connected
+
+.. tip::
+    For more information on ``USB to UART`` cables, 
+    you can checkout :ref:`serial-debug-cables` section.