Samosrfist & Nfilipe,
Not sure what to say. Without your hardware in front of me, its a bit hard to troubleshoot.
One thing I always check is that the Beacon module isnāt aready connected to another device or another app on the same device and therefore stops sending advertising packets.
Found the cause of my problemā¦ the beacons were not broadcasting the default uuid. On the final version of the android app i was not testing for it.
So thanks to this I solved 2 errors.
Thanks,
Great tutorial. Thanks a lot!
Could you please suggest some nice hardware iBeacons? Suitable for this tutorial application purposes. I mean rather small ibeacons to put to cats collar 
or to bags, laptops etc.
Hey novoselov,
Personally, I havenāt used many off the shelf beacons. The applications I work with require custom hardware so I write the beacon code.
From a little experience though, Iāve had bad experience with the cheap, no-name ones. Some of them were just BLE devices but didnāt conform to the beacon advertising standard and therefore was not recognizable by a beacon scanner.
This tutorial is more than six months old so questions are no longer supported at the moment for it. We will update it as soon as possible. Thank you! :]