The Faurecia BioFit Seat is a Bluetooth LE peripheral.
| Type |
Value |
| int8 |
-128 .. 127 |
| uint8 |
0 .. 255 |
| int16 |
-32768 .. 32767 |
| uint32 |
elapsed time |
Characteristics marked with an asterisk are independently notifiable
with values sent once per second. Other attributes are only notified
when the value changes.
All values are integers unless a decimal precision is shown in which
case it is fixed point (treat as integer and divide by 10 * number of
decimal places to convert to floating point). The numeric types in
order of preference are:
Reading BioFit Property Values
To get a stream of data from BioFit, use the notifiable group characteristic to specify which property values you would like to receive updates on. To do this, write the IDs (not the UUIDS) to the Notifiable Group characteristic.
The Notifiable Group Values characteristic will notify every second with the values that were requested in the write to Notifiable Group. The first item in the list will always be a uint32 timestamp of when the data sample was taken. The subsequent values will be the requested properties, in the order they were written to the request.
Properties are also readable. Reading loses the optimization benefit of packaging them together into a single communication, and loses the benefit of the timestamp. Reading is great for values that you want to check infrequently.
Limitations
A Bluetooth communication is limited to 20 bytes, so the size of the uint32 timestamp plus the length of the property data types requested must not exceed 20 bytes.
Example Workflow
- Write [7,11,12] as uint values to the notifiable group characteristic
- Subscribe to the notifiable group values characteristic
- When a notify occurs on the notifiable group, decode the array of values that are returned: [uint32 timestamp, int8 heart rate, int8 systolic blood pressure, int8 diastolic blood pressure]
Performing Seat Functions
BioFit also supports several seat functions such as performing massages, updating the position and heating and cooling the BioFit. BioFit function characteristics are writeable. Performing a function is as simple as writing to that function's characteristic.
Functions take a little bit of time to complete - the seat can't instantly move forward. When the requested operation is complete, the write effect complete characteristic will notify with the int8 id of function characteristic that completed.
BioFit Service
BioFit has only one Bluetooth service. Its UUID is:
E5E8451C-A235-4A96-9E81-EAE3DF296564
BioFit Characteristics
Property Characteristic Details
ID0
|
UUIDB43EED9C-E88E-42FF-AB8C-4399977C3D9D
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 or 1
|
Description
1 if seat is occupied, 0 if not
ID1
|
UUID71BFAE4D-51CD-422D-AE87-B4921AC75C1
|
Type uint32
|
Bluetooth Properties Readable
|
Valuesyyyy-MM-dd-HH:mm:ss.SSSS
|
Description
Time at which the most recent data reading was recorded from BioFit.
ID2
|
UUID 21752B03-3735-473E-903F-485CF77DA0AE
|
Type uint32
|
Bluetooth Properties Readable
|
Valuesyyyy-MM-dd-HH:mm:ss.SSSS
|
Description
The time at which the initial connection was made to the Bluetooth BioFit peripheral.
ID3
|
UUID0A347E6C-02E4-4749-A8A4-6BD6202E8FEA
|
Type uint32
|
Bluetooth Properties Readable
|
Values milliseconds since initial connection was made.
|
Description
Elapsed time since initial connection was made in milliseconds
ID4
|
UUIDB4A265CD-2786-432D-8E92-819B9113AA10
|
Type uint8 for each element in array
|
Bluetooth PropertiesReadable, Writeable
|
Values [int8 ID-1][int8 ID-2]...[int8 ID-N]
|
Description
A list of characteristics to notify at 1Hz. Notifications will occur on the
notifiable group values characteristic.
ID5
|
UUID5957BE8F-C01F-4531-A529-0924398E4FE9
|
Type Array of individually typed values
[uint32, [type-1][type-2]...[type-n]]
|
Bluetooth Properties Readable, Notifiable
|
Values [Current Elapsed Time][Value-1][Value-2]...[Value-N]
|
Description
The packed values of the characteristics in the group. Values to notify determined by the
notifiable group characteristic. Limited to a total length of 20 bytes. The first item will always be the time at which the requested values were read.
ID6
|
UUIDF56A209B-2285-44E5-862F-1AB206DFFBE6
|
Type uint8
|
Bluetooth Properties Readable, Notifiable
|
Values [id] (0 ..40)
|
Description
Contains the id of a property. Notifies when the request that was written is complete.
ID 7
|
UUID39D1E3AE-EA25-43BD-BB62-ADD8ECD897D5
|
Type uint8
|
Bluetooth Properties Readable
|
Values 0 .. 255
|
Description
Heart Rate Value in Beats / Minute
ID8
|
UUIDD5F34109-9F28-4213-85A4-808357CEF8F3
|
Type uint8
|
Bluetooth Properties Readable
|
Values 0 .. 200
|
Description
Filtered Respiration Rate Value in Breaths / Minute
ID9
|
UUID8217E89D-C226-45F6-A36E-DA23DDE4A83A
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
An integrated score that describes an occupant’s respiratory status (normal = 10, less than 6 may indicate intervention required)
ID10
|
UUID00CFF3E3-A2FF-4E05-8EFA-C22D799EB136
|
Type int8
|
Bluetooth Properties Readable
|
Values 0.00 .. 1.00
|
Description
heartRateVariability = returned int8 value / 100.
=LF/(LF+HF): Very Low Frequency (VLF) < 0.04 Hz Low Frequency (LF), 0.04 .. 0.14 Hz High Frequency (HF) 0.15 .. 0.40 Hz
ID11
|
UUIDD9A9F3E2-E884-40F4-91D6-41892C2D2E73
|
Type uint8
|
Bluetooth Properties Readable
|
Values 0 .. 255
|
Description
Value in mmHG (normal < 120, prehypertension 120 .. 139, hypertension 140 ..)
ID12
|
UUID0038087B-31E2-4D67-8106-A4996E329EE2
|
Type uint8
|
Bluetooth Properties Readable
|
Values 0 .. 255
|
Description
Value in mmHG (normal < 80, prehypertension 80 .. 89, hypertension 90 ..)
ID13
|
UUID65CF8D40-8943-473A-8DC9-400F5A17A6C7
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
An integrated score that estimates an individual’s blood flow relative to ideal: ideal blood flow = 100, poor blood flow = 0
ID14
|
UUID48560C7A-F383-4C27-BE20-E92C416C8F80
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
An integrated score that estimates an individual’s level of comfort: extreme comfort = 100, extreme discomfort = 0
ID15
|
UUID96A70770-C16F-40CC-BB4D-768E0F02494E
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
0 is very un-stressed, 100 is very stressed
ID16
|
UUIDC2D2F281-7756-47A7-9B14-C9BAC900354F
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
An estimate of emotional positivity or negativity: negative = 0, neutral = 50, positive = 100
ID17
|
UUID3B7E5227-2926-4E15-9FE6-E4CD273371B2
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
An estimate of how strong someone’s emotion is: calm = 0, excited = 100
ID18
|
UUIDE76B29AC-FD59-4530-898B-35AB751A43C8
|
Type int16
|
Bluetooth Properties Readable
|
Values 0 .. 500
|
Description
Weight in Kilograms
ID19
|
UUIDB11102CC-5235-44BE-B8E8-825DFF3B90FD
|
Type [int16, int16, int16]
|
Bluetooth Properties Readable
|
Values (-500, -500, -500) .. (500, 500, 500)
|
Description
XYZ Coordinates Relative to H-Point (mm)
ID20
|
UUID2B46CF2F-C102-4683-8F05-9E6AD5A84843
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
Percent Relative Humidity
ID21
|
UUID4612CD0D-64F0-4140-9EB5-198B770FC0D0
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
Percent Relative Humidity
ID22
|
UUID53603F65-6B4B-4D46-B373-B486B78590D2
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
Percent Relative Humidity
ID23
|
UUID7E3DF6AE-41C7-493E-8D4D-556A62321A9B
|
Type int8
|
Bluetooth Properties Readable
|
Values 0 .. 100
|
Description
Percent Relative Humidity
ID24
|
UUID75A8A1EF-B8E0-4FB4-A867-B68E653DF932
|
Type int16
|
Bluetooth Properties Readable
|
Values 0 .. 85
|
Description
Value in ⁰C
Cushion Surface Temperature = returned int16 value / 10
ID25
|
UUID2CD29B7B-22D5-4371-89FF-E849E2120929
|
Type int16
|
Bluetooth Properties Readable
|
Values 0.0 .. 85.0
|
Description
Value in ⁰C
Back Surface Temperature = returned int16 value / 10
ID26
|
UUID45DEFC80-B2FC-49A4-A97D-A68FFDEFF8C2
|
Type int16
|
Bluetooth Properties Readable
|
Values 0.0 .. 85.0
|
Description
Value in ⁰C
Ambient Temperature = returned int16 value / 10
ID27
|
UUID1BA22BC7-28AB-4B25-A0EE-4553C4C28DC2
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 0.0 .. 100.0
|
Description
% of Range. 0 is no pressure, 100 is maximum pressure.
ID28
|
UUID636235DE-D04C-42DD-8673-F11918D7C5BD
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 0 .. 100
|
Description
% of Range. 0 is no pressure, 100 is maximum pressure.
ID29
|
UUIDE430BAFB-B101-4896-9957-6E3938F575D8
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 0 .. 100
|
Description
% of Range. 0 is no pressure, 100 is maximum pressure.
ID30
|
UUID434A3872-2DE3-4E76-A120-30A179286D28
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 0 .. 100
|
Description
% of Range. 0 is no pressure, 100 is maximum pressure.
ID31
|
UUID984CB911-02F5-4941-9A1D-AD09A5764F15
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 0 .. 100
|
Description
% of Range. 0 is no pressure, 100 is maximum pressure.
ID32
|
UUID65A45C5D-9B54-4488-ABD2-1853D11E7F54
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 0 .. 100
|
Description
Percent of Full Extension. 0 is minimum extension, 100 is maximum extension.
ID33
|
UUID7949ABDC-965E-4175-ACF1-B842848C6AD5
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 0 .. 100
|
Description
% of Range. 0 is no pressure, 100 is maximum pressure
ID34
|
UUIDEC7D0CB9-34D4-423C-AAAC-CFF722E3A6C5
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values -20 .. +30
|
Description
Angle in Degrees
ID35
|
UUIDE66E4070-831B-4E23-B05E-D7BE5F06AF4B
|
Type uint8
|
Bluetooth Properties Readable, Writeable
|
Values 0 .. 99
|
Description
0 is off, 1-99 are pre-set programs. If you would like to run a specific program (ie 3 beats upper left, 3 beats upper right, 3 beats lower left, 3 beats lower right), pick a number, and describe in a README what program that represents.
ID36
|
UUID165F7489-A805-4D70-8900-135A4E174404
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 1 .. 9
|
Description
1 is min intensity, 9 is max intensity
ID37
|
UUIDC4248837-F351-4538-9A73-8480637F3841
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values 1 .. 9
|
Description
1 is min speed, 9 is max speed
ID38
|
UUID25BFE8A4-786D-458D-A4AD-F710D4E7EFC6
|
Type uint8
|
Bluetooth Properties Readable, Writeable
|
Values 1 .. 9
|
Description
0 is off, 1 is min ventilation, 9 is max ventilation
ID39
|
UUIDC391FFC3-BD58-4BB4-AC90-08A96BF04E39
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values-9 .. 9
|
Description
Less than 0 is cooling, 0 is off, greater than 0 is heating. A higher magnitude represents a higher magnitude temperature.
ID40
|
UUIDB3AB6D33-3E6A-42B3-B1BD-D821FFBE3090
|
Type int8
|
Bluetooth Properties Readable, Writeable
|
Values -9 .. 9
|
Description
Less than 0 is cooling, 0 is off, greater than 0 is heating. A higher magnitude represents a higher magnitude temperature.