Automate Bluetooth?

Well, it's not that simple - it's a lot easier to just click a couple of times in the menu extra. I am guessing that the "Enable access for assistive devices" box is checked in the System preferences > Universal Access, since at least the main menu is getting clicked. Using GUI scripting is a bit of a hack to begin with, and the menu extras (the menu items on the right side of the menu bar) aren't your regular menu items. Scripting the regular menus usually works OK if that is the only way to do it, but the menu extras can fail in a number of mysterious ways since they are built different.

The following AppleScript is an example of clicking an item in a menu extra, and can be run by itself or placed in a "Run AppleScript action. I don't have a mobile to test, so I used the "Open Bluetooth Preferences…" item - replace the menu item with the name of the item you want to click:

<pre style="
font-family: Monaco, 'Courier New', Courier, monospace;
font-size: 10px;
margin: 0px;
padding: 5px;
border: 1px solid #000000;
width: 720px;
color: #000000;
background-color: #FFDDFF;
overflow: auto;"
title="this text can be pasted into the Script Editor">
tell application "System Events" to tell process "SystemUIServer"
tell menu bar 1
set menu_extras to value of attribute "AXDescription" of menu bar items
repeat with the_menu from 1 to the count of menu_extras
if item the_menu of menu_extras is "bluetooth" then tell menu bar item the_menu
click
delay 0.5
click menu item "Open Bluetooth Preferences…" of front menu
delay 0.5
end tell
end repeat
end tell
end tell</pre>

Herry wrote:
What am i doing wrong?

The answer to your question is simple:
Record mouse-clicks in a menu extra´s submenu does not work.
But you can realize it like this: Click on the menu extra and then use the keyboard to navigate to and activate the sub menu´s item (by using "arrow down" and "return")

A GUI Script works a bit more "safe" then an Automator-record, but not that "safe" at all. If there is any chance to avoid it, do not use it.
In your case maybe the best solution to use a command-line tool named blueutil

If you will give it a try, to run it from Automator you need the Run shell script action with the command: +/usr/local/bin/blueutil on+

And maybe later in the workflow
+/usr/local/bin/blueutil off+

Spażek