org.bluetooth.characteristic.cgm_measurement.xml

<?xml version="1.0" encoding="utf-8"?>
<!--Copyright 2014 Bluetooth SIG, Inc. All rights reserved.-->
<Characteristic xsi:noNamespaceSchemaLocation="http://schemas.bluetooth.org/Documents/characteristic.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
name="CGM Measurement"
type="org.bluetooth.characteristic.cgm_measurement" uuid="2AA7"
last-modified="2014-11-17" approved="Yes">
  <InformativeText>
    <Summary>The CGM Measurement characteristic is a variable
    length structure containing one or more CGM Measurement
    records, each comprising a Size field, a Flags Field, a Glucose
    Concentration field, a Time Offset field, a Sensor Status
    Annunciation field (optional), a CGM Trend Information Field
    (optional), a CGM Quality Field (optional), and an E2E-CRC
    Field (mandatory if this feature is supported).</Summary>
  </InformativeText>
  <Value>
    <Field name="Size">
      <InformativeText>The Size Field represents the size of the
      CGM Measurement record. In minimum the size is 6 octets and
      is enlarged by more octets indicated by the Flags Field
      (Sensor Status Annunciation Field, CGM Trend Information
      Field and CGM Quality Field) and the E2E-CRC Supported bit in
      CGM Feature. The Size Field itself is included in the overall
      length calculation.</InformativeText>
      <Requirement>Mandatory</Requirement>
      <Format>uint8</Format>
    </Field>
    <Field name="Flags">
      <Requirement>Mandatory</Requirement>
      <Format>8bit</Format>
      <BitField>
        <Bit index="0" size="1"
        name="CGM Trend Information Present">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" requires="C1" />
          </Enumerations>
        </Bit>
        <Bit index="1" size="1" name="CGM Quality Present">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" requires="C2" />
          </Enumerations>
        </Bit>
        <Bit index="5" size="1"
        name="Sensor Status Annunciation Field, Warning-Octet present">

          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" requires="C4" />
          </Enumerations>
        </Bit>
        <Bit index="6" size="1"
        name="Sensor Status Annunciation Field, Cal/Temp-Octet present">

          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" requires="C4" />
          </Enumerations>
        </Bit>
        <Bit index="7" size="1"
        name="Sensor Status Annunciation Field, Status-Octet present">

          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" requires="C4" />
          </Enumerations>
        </Bit>
        <ReservedForFutureUse index="2" size="3" />
      </BitField>
    </Field>
    <Field name="CGM Glucose Concentration">
      <InformativeText>The CGM Glucose Concetration Field contains
      the CGM glucose concentration in mg/dL as a SFLOAT data type.
      The SFLOAT-Type is a 16-bit word comprising a signed 4-bit
      integer exponent followed by a signed 12-bit Mantissa, each
      in twos-complement form.</InformativeText>
      <Requirement>Mandatory</Requirement>
      <Format>SFLOAT</Format>
      <Unit>
      org.bluetooth.unit.mass_density.milligram_per_decilitre</Unit>
      <DecimalExponent>0</DecimalExponent>
    </Field>
    <Field name="Time Offset">
      <InformativeText>The following values are defined for the
      Time Offset Field, specifying the relative time difference of
      the single CGM values to the session start time. Value:
      (0x0000 - 0xFFFF), Description: (Time offset in minutes as
      offset to the Session Start Time).</InformativeText>
      <Requirement>Mandatory</Requirement>
      <Format>uint16</Format>
      <Unit>org.bluetooth.unit.time.minute</Unit>
      <DecimalExponent>0</DecimalExponent>
    </Field>
    <Field name="Sensor Status Annunciation">
      <InformativeText>The Sensor Status Annunciation Field is an
      optional field comprising up to three octets. It is only
      attached if one or more bits are set to ?1?. Only the
      affected octet(s) shall be added and indicated by the Flags
      Field. The Sensor Status Annunciation Field shall be attached
      to every CGM Measurement Record to which the status
      applies.</InformativeText>
      <Requirement>C4</Requirement>
      <Format>variable</Format>
      <Description>The format "Variable" is Defined by the Service
      Specification</Description>
      <BitField>
        <Bit index="0" size="1" name="Session Stopped">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="1" size="1" name="Device Battery Low">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="2" size="1"
        name="Sensor type incorrect for device">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="3" size="1" name="Sensor malfunction">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="4" size="1" name="Device Specific Alert">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="5" size="1"
        name="General device fault has occurred in the sensor">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="8" size="1"
        name="Time synchronization between sensor and collector required">

          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="9" size="1" name="Calibration not allowed">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="10" size="1" name="Calibration recommended">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="11" size="1" name="Calibration required">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="12" size="1"
        name="Sensor Temperature too high for valid test/result at time of measurement">

          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="13" size="1"
        name="Sensor temperature too low for valid test/result at time of measurement">

          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="16" size="1"
        name="Sensor result lower than the Patient Low level">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="17" size="1"
        name="Sensor result higher than the Patient High level">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="18" size="1"
        name="Sensor result lower than the Hypo level">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="19" size="1"
        name="Sensor result higher than the Hyper level">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="20" size="1"
        name="Sensor Rate of Decrease exceeded">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="21" size="1"
        name="Sensor Rate of Increase exceeded">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="22" size="1"
        name="Sensor result lower than the device can process">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <Bit index="23" size="1"
        name="Sensor result higher than the device can process">
          <Enumerations>
            <Enumeration key="0" value="False" />
            <Enumeration key="1" value="True" />
          </Enumerations>
        </Bit>
        <ReservedForFutureUse index="6" size="2" />
        <ReservedForFutureUse index="14" size="2" />
      </BitField>
    </Field>
    <Field name="CGM Trend Information">
      <InformativeText>The CGM Trend Information Field contains the
      CGM Trend information in (mg/dL)/min as an SFLOAT data type.
      This field is optional if the device supports CGM Trend
      information (Bit 15 in CGM Feature is set to 1) otherwise
      excluded.</InformativeText>
      <Requirement>C1</Requirement>
      <Format>SFLOAT</Format>
      <Unit>
      org.bluetooth.unit.mass_density.milligram_per_decilitre</Unit>
      <DecimalExponent>0</DecimalExponent>
    </Field>
    <Field name="CGM Quality">
      <InformativeText>This field contains the CGM Quality
      information in % as an SFLOAT data type. The SFLOAT-Type is a
      16-bit word comprising a signed 4-bit integer exponent
      followed by a signed 12-bit Mantissa, each in twos-complement
      form. This field is optional if the device supports CGM
      Quality (Bit 16 in CGM Feature is set to 1) otherwise
      excluded.</InformativeText>
      <Requirement>C2</Requirement>
      <Format>SFLOAT</Format>
      <Unit>org.bluetooth.unit.percentage</Unit>
      <DecimalExponent>0</DecimalExponent>
    </Field>
    <Field name="E2E-CRC">
      <InformativeText>If the device supports E2E-safety (E2E-CRC
      Supported bit is set in CGM Feature), the measurement is
      secured by a CRC calculated over all fields. The computation
      of the CRC is done using a CRC-CCITT generator polynomial
      g(D)=D16+D12+D5+1 (i.e.210041 in octal representation) with a
      seed of 0xFFFF. This field is mandatory if the device
      supports E2E-CRC (Bit 12 in CGM Feature is set to 1)
      otherwise excluded.</InformativeText>
      <Requirement>C3</Requirement>
      <Format>uint16</Format>
    </Field>
  </Value>
  <Note>
    <p>The fields in the above table are in the order of LSO to
    MSO. Where LSO = Least Significant Octet and MSO = Most
    Significant Octet</p>
    <p>C1: Optional if device supports CGM Trend Information (Bit
    15 is set in CGM Feature) otherwise excluded.</p>
    <p>C2: Optional if device supports CGM Quality (Bit 16 is set
    in CGM Feature) otherwise excluded.</p>
    <p>C3: Mandatory if device supports E2E-CRC (Bit 12 is set in
    CGM Feature) otherwise excluded.</p>
    <p>C4: Optional if bit 5 or bit 6 or bit 7 of the flgas field
    is set to ?1?, otherwise excluded.</p>
  </Note>
</Characteristic>