Did you have error messages while you were installing BlueZ 5.30? Did you install the source on the Release 2.1 or did you create a custom image?
What is the immediate output of running hcitool lescan?
Are you able to detect devices using hcitool scan?
If there are no LE devices near or as discoverable you can obtain that loop too. Are you sure you are using a LE device and that it is discoverable for other devices?
Other makers also use GATTtool, you can try with that too.