Reverse Engineer Estimote, make your own beacons

http://makezine.com/2014/01/03/reverse-engineering-the-estimote/

It’s fairly simple to build your own iBeacon—either using a Raspberry Pi or using a Bluetooth LE board like the Red Bear Labs BLE Mini board

This is an old post but may still be useful..

Screen Shot 2016-08-09 at 10.26.00