SensirionSHT4x.h file
Contains the SensirionSHT4x sensor subclass and the variable subclasses SensirionSHT4x_
- Reference
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Detailed Descriptions
These are used for the Sensirion SHT40, SHT41, and SHT45 capacitive humidity and temperature sensor.
This depends on the Adafruit SHT40 library.
Classes
- class SensirionSHT4x
- The Sensor sub-class for the Sensirion SHT4x.
- class SensirionSHT4x_Humidity
- The Variable sub-class used for the relative humidity output from an Sensirion SHT4x.
- class SensirionSHT4x_Temp
- The Variable sub-class used for the temperature output from an Sensirion SHTx0.
Defines
- #define SHT4X_NUM_VARIABLES = 2
- Sensor::
_numReturnedValues; the SHT4x can report 2 values. - #define SHT4X_INC_CALC_VARIABLES = 0
- Sensor::
_incCalcValues; we don't calculate any additional values.
Sensor Timing
The sensor timing for an Sensirion SHT4x
- #define SHT4X_WARM_UP_TIME_MS = 1
- Sensor::
_warmUpTime_ms; SHT4x warms up in 0.3ms (typical) and soft-resets in 1ms (max). - #define SHT4X_STABILIZATION_TIME_MS = 0
- Sensor::
_stabilizationTime_ms; SHT4x is assumed to be immediately stable. - #define SHT4X_MEASUREMENT_TIME_MS = 9
- Sensor::
_measurementTime_ms; SHT4x takes 8.2ms (max) to complete a measurement at the highest precision. At medium precision measurement time is 4.5ms (max) and it is 1.7ms (max) at low precision.
Humidity
The humidity variable from an Sensirion SHT4x
- Range is 0 to 100% RH
- Accuracy is ± 1.8 % RH (typical)
Construct a new SensirionSHT4x_
SensirionSHT4x_Humidity(SensirionSHT4x* parentSense,
const char* uuid = "",
const char* varCode = SHT4X_
Parameters
parentSense
The parent SensirionSHT4x providing the result values.
uuid
A universally unique identifier (UUID or GUID) for the variable; optional with the default value of an empty string.
varCode
A short code to help identify the variable in files; optional with a default value of "SHT4xHumidity".
- #define SHT4X_HUMIDITY_RESOLUTION = 2
- Decimals places in string representation; humidity should have 2 (0.01 % RH).
- #define SHT4X_HUMIDITY_VAR_NUM = 0
- Sensor variable number; humidity is stored in sensorValues[0].
- #define SHT4X_HUMIDITY_VAR_NAME = "relativeHumidity"
- Variable name in ODM2 controlled vocabulary; "relativeHumidity".
- #define SHT4X_HUMIDITY_UNIT_NAME = "percent"
- Variable unit name in ODM2 controlled vocabulary; "percent" (percent relative humidity)
- #define SHT4X_HUMIDITY_DEFAULT_CODE = "SHT4xHumidity"
- Default variable short code; "SHT4xHumidity".
Temperature
The temperature variable from an Sensirion SHT4x
- Range is -40°C to +125°C
- Accuracy is ±0.2°C
Construct a new SensirionSHT4x_
SensirionSHT4x_Temp(SensirionSHT4x* parentSense,
const char* uuid = "",
const char* varCode = SHT4X_
Parameters
parentSense
The parent SensirionSHT4x providing the result values.
uuid
A universally unique identifier (UUID or GUID) for the variable; optional with the default value of an empty string.
varCode
A short code to help identify the variable in files; optional with a default value of "SHT4xTemp".
- #define SHT4X_TEMP_RESOLUTION = 2
- Decimals places in string representation; humidity should have 2 (0.01 °C).
- #define SHT4X_TEMP_VAR_NUM = 1
- Sensor variable number; temperature is stored in sensorValues[1].
- #define SHT4X_TEMP_VAR_NAME = "temperature"
- Variable name in ODM2 controlled vocabulary; "temperature".
- #define SHT4X_TEMP_UNIT_NAME = "degreeCelsius"
- Variable unit name in ODM2 controlled vocabulary; "degreeCelsius" (°C)
- #define SHT4X_TEMP_DEFAULT_CODE = "SHT4xTemp"
- Default variable short code; "SHT4xTemp".