Activate Bluetooth device

ActivateBTDevice.applescript

set mouseName to "James Mouse" -- edit as appropriate
-- SystemUIServer controls the right hand side of the Menu bar - AHA! 

tell application "System Events" to tell the front menu bar of process "SystemUIServer"
    activate
    delay 0.5
    tell menu bar item 1    
        click
        tell menu item mouseName of menu 1
            click
            delay 0.2
            tell menu item 1 of menu mouseName
                click
                delay 0.2
            end tell
        end tell
    end tell
end tell