mergCLStartRangingBeaconsInRegion <pIdentifier>, <pProximityUUID>, [<pMajor>], [<pMinor>]
a unique identifier for a region. Using the same identifier twice will replace the first region.
a UUID for the region
(optional with 0 default) value identifying a group of beacons
(optional with 0 default) value identifying a specific beacon in a group