The ABSniffer 502 scans for (any manufacturer) iBeacons and sends the data via USB/TTL plugged into a PC, Mac, Linux or Raspberry Pi. It shows up on the Raspberry Pi as /dev/ttyACM0. It communicates with PCs through a virtual UART port sending the MAC address, UUID, major, minor, measured power and RSSI. It can also be used to configure AprilBrother beacons via USB/TTL commands.
AprilBrother has a full list of AT commands.