Campbell Scientific HydroSense II Support Software User Guide - Manual (Page 63)

Section 6. Terms
6.1 Bluetooth Adapter
The Bluetooth adapter is a hardware device connected to the local PC that
transmits and receives radio signals required for Bluetooth communications.
On desktop computers, the adapter is usually a USB device that connects to a
USB port on the computer. If the HydroSense II Support Software is reporting
a BTStackError, check that the USB device is firmly inserted into a USB port
on the PC. The Bluetooth stack on the computer should recognize that the
device is attached.
On laptop computers, the adapter is often built into the laptop hardware so that
an extra USB adapter is not required. These laptop computers will have an
option to enable/disable the internal adapter. Usually, this function is
performed by a special key on the laptop keyboard or an extra sliding switch on
the side of the laptop. If the software is reporting a BTStackError, check that
the internal Bluetooth adapter is enabled using the hotkey or switch.
6.2 Bluetooth Stack
The term Bluetooth stack refers to the collection of code on a PC which
handles Bluetooth traffic.
HydroSense II Support Software supports the four major Bluetooth stacks
currently on the market: Microsoft, BlueSoleil, Toshiba and Broadcom.
6.3 VWC
VWC is an acronym for volumetric water content. This is a measure of the
volume of water present in soil expressed as a percentage of the total volume.
A VWC of 20% indicates that the water fraction is 20% the soil by volume.
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