Bluetooth Reader (Wiegand). Vanderbilt?s range of Bluetooth Readers is a secure and flexible identification solution bringing the access credential to Android and iOS smartphones. Bluetooth Low Energy (BLE) is transforming the future of access control and removes the need for a physical card or tag. Simultaneous support of smartphones and a wide range of smart cards bridges the gap from traditional access credentials to cardless mobile access control and allows a seamless integration into existing locations. Available communication interfaces include BLUE-A: Wiegand, BLUE-B: Wiegand (with keypad), BLUE-C: OSDP and BLUE-D: OSDP (with keypad).