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Index: book.xml.withusb
===================================================================
--- book.xml.withusb
+++ book.xml.withusb
@@ -6328,6 +6328,47 @@
always have a modem attached to the
port.</para>
+ <para>If you are using USB to UART converter cables,
+ then it will show up as a different device. An easy way to
+ find out what it will show up in &man.dmesg.8; is to run
+ &man.dmesg.8; without having your device connected, then
+ running &man.dmesg.8; again to see what your device is
+ listed as: </para>
+
+ <screen>&prompt.user;<userinput> dmesg | tail -5</userinput>
+ums0: 3 buttons and [XYZ] coordinates ID=0
+ugen1.5: &lt;Logitech USB Keyboard&gt; at usbus1
+ukbd0 on uhub3
+ukbd0: &lt;USB Keyboard&gt; on usbus1
+kbd2 at ukbd0
+&prompt.user;<userinput>dmesg | tail -5</userinput>
+ukbd0: &lt;USB Keyboard&gt; on usbus1
+kbd2 at ukbd0
+ugen1.4: &lt;Silicon Labs CP2102 USB to UART Bridge Controller&gt;at usbus1
+uslcom0 on uhub3
+uslcom0: &lt;CP2102 USB to UART Bridge Controller&gt; on usbus1</screen>
+
+ <para>In the commands above, the first &man.dmesg.8;
+ happened before the device was connected. Then we
+ connected the usb and the second &man.dmesg.8; was used
+ to show the device detected. The <command> | tail -5 </command>
+ pipe was used to do limit the output to 5 lines. This is
+ only a way to ensure that our device is detected, but it
+ will not show up in <filename>/dev/</filename> as
+ <filename>uslcom0.</filename> USB to UART devices usually
+ show up as <filename>ttyUX</filename> where X is the
+ number of device.</para>
+
+ <para>To establish a connection through USB to UART, use the
+ <command>cu</command> command. For example if the
+ device is shown up in <filename>/dev/ttyU0</filename>:</para>
+
+ <screen>&prompt.user;<userinput>cu -l /dev/ttyU0 -s [speed]</userinput></screen>
+
+ <para>Where <command>speed</command> is the baud-rate of
+ your device which you can find on your device's website.
+ For BeagleBone Black, as an example, this is 115,200.</para>
+
<para>The <filename>GENERIC</filename> kernel includes
support for two serial ports using the same IRQ and port
address settings in the above example. If these settings

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