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==Concepts and Definitions==
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*'''Fixed PIN''': a PIN code that is preset in the OPN2002. Typically the last 4 characters of the OPN2002's Bluetooth name.
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*'''Dynamic PIN''': a PIN code that is determined at pair time by the Bluetooth host.
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*'''HID''': Human Interface Device. In the case of the OPN2002, it's recognized as a Bluetooth HID keyboard, meaning that each character of a scanned barcode is transmitted to the host as a keyboard press. HID devices cannot be used as a master at pair time, but after pairing with a Bluetooth host, can switch roles and become master devices for reconnection purposes.
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*'''SPP (VCP)''': Serial Port Profile (Virtual COM Port). In the case of the OPN2002, it sends data serially to a serial port on the Bluetooth host. Software running on the host can read from that serial port to capture the data.
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*'''Embedded Firmware''': The embedded OS and application that is present on the OPN2002, and required for its function.
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*'''Embedded OS''': A binary common to all OPN2002s that enables the OPN2002 to function and exposes an API that the OPN2002's embedded applications utilize to "drive" the device.
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*'''Default Firmware, OS, or Application''': Refers to standard Opticon software for the OPN2002, typically installed on the OPN2002 at the factory and present out-of-the-box. The OS version string is always RBGVXXYY, where XX denotes the major revision and YY denotes the minor revision. The application version string is RFGAAABB, where AAA denotes the major revision and BB denotes the minor revision. Occasionally, the first 'A' in RFGAAABB is a letter, denoting the Opticon office responsible for developing the software.
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