23 |
M 5 7 4 8
7.4
Humidity Sensor Interface
The Humidity sensor provides readings of 0 to 100 % Relative Humidity.
Humidity Descriptor
Offset
Name
Value
Description
0x00
Sensor Type
0x02
Relative humidity (%)
0x01
Data Type/Format
0x06
Float type
0x02
Configuration
??
See below
0x03
Sensor Device
0x00
Not Used
0x04
UOMR
“%RH”
Units of measure
Humidity Sensor Type
The Humidity interface provides a measurement of Relative Humidity (%).
Sensor Type
SI Derived Units
Measurement
0x02
%RH
Relative Humidity
Humidity Data Type/Format
Humidity Data Type/Format
7
6
5
4
3
2
1
0
Smart
Sensor
Writeable
Factory
Calibrate
Data Type
0
0
0
0
6 == Floating point
Data Type
The 4-bit Data Type field determines the type of data of the specific sensor.
Factory Calibrate
The Factory Calibrate bit is used during factory calibration. If set, factory calibration is
performed on the raw sensor reading PRIOR to user scaling.
Writeable
The writeable bit is cleared, indicating that the sensor values may not be overwritten.
Smart Sensor
This bit is cleared.
Humidity Configuration Byte
Humidity Sensor Configuration
7
6
5
4
3
2
1
0
Available
Assigned
Apply
Scaling
Lock
Sensor Selection
0
0
?
?
0x02 (Internal use)
Lock
If set, the user specified units of measure string (4 character maximum) will be used in
place of the default units of measure.