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org.bluetooth.characteristic.position_quality

Last Modified: 2013-05-13 Approved: Yes

Name: Position Quality

Type: org.bluetooth.characteristic.position_qualityDownload / View

Assigned Number: 0x2A69

Summary:

The Position Quality characteristic is a variable length structure containing a Flags field and at least one of the optional data fields listed below

Value Fields

Names Field Requirement Format Minimum Value Maximum Value Additional Information
Flags
Mandatory
16bit N/A N/A
Bit Field
Bit Size Name
Definition
Key Value
0 1 Number of Beacons in Solution Present
0 False
1 True
1 1 Number of Beacons in View Present
0 False
1 True
2 1 Time to First Fix Present
0 False
1 True
3 1 EHPE Present
0 False
1 True
4 1 EVPE Present
0 False
1 True
5 1 HDOP Present
0 False
1 True
6 1 VDOP Present
0 False
1 True
7 2 Position Status
0 No Position
1 Position Ok
2 Estimated Position
3 Last Known Position
9 7 Reserved for future use
Number of Beacons in Solution
Information:
Unitless with a resolution of 1
Unit:
org.bluetooth.unit.unitless
Exponent: Decimal, 0
Optional
uint8 N/A N/A None
Number of Beacons in View
Information:
Unitless with a resolution of 1
Unit:
org.bluetooth.unit.unitless
Exponent: Decimal, 0
Optional
uint8 N/A N/A None
Time to First Fix
Information:
Unit is in seconds with a resolution of 1/10
Unit:
org.bluetooth.unit.time.second
Exponent: Decimal, -1
Optional
uint16 N/A N/A None
EHPE
Information:
Unit is in meters with a resolution of 1/100
Unit:
org.bluetooth.unit.length.meter
Exponent: Decimal, -2
Optional
uint32 N/A N/A None
EVPE
Information:
Unit is in meters with a resolution of 1/100
Unit:
org.bluetooth.unit.length.meter
Exponent: Decimal, -2
Optional
uint32 N/A N/A None
HDOP
Information:
Unitless with a resolution of 2/10
Unit:
org.bluetooth.unit.unitless
Exponent: Decimal, -1
Multiplier: 2
Optional
uint8 N/A N/A None
VDOP
Information:
Unitless with a resolution of 2/10
Unit:
org.bluetooth.unit.unitless
Exponent: Decimal, -1
Multiplier: 2
Optional
uint8 N/A N/A None

Note:

The fields in the above table, reading from top to bottom, are shown in the order of LSO to MSO, where LSO = Least Significant Octet and MSO = Most Significant Octet. Where a field with the format ‘16bits’ or ‘32bits’ is used, the Least Significant Octet represents the eight bits numbered 0 to 7.