Component: Temp / Humidity (Grove 101020019) (101020019) (Environmental)

Author	Matrix TSL
Version	1.2
Category	Environmental

Temp / Humidity (Grove 101020019) component

The DHT22 temperature and humidity sensor is a popular sensor allowing the ambient temperature and relative humidity to be monitored digitally. Humidity Range = 0% - 100% +/- 2% Temperature Range = -40 - 80 Degrees C +/- 0.5 Degrees C

Component Source Code

Please click here to download the component source project: FC_Comp_Source_Grove_DHT22.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_Grove_DHT22.fcfx

Detailed description

No detailed description exists yet for this component

Examples

No additional examples

Macro reference

GetHumidityFloat

	GetHumidityFloat
Gets the humidity returned by calling SampleSensor as a floating point number. If humidity is 15.8 % then this function would return 15.8.
- FLOAT	Return

GetHumidityReal

	GetHumidityReal
Gets the real number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 8.
- INT	Return

GetHumidityString

	GetHumidityString
Gets the humidity returned by calling SampleSensor as a string. If humidity is 15.8 % then this function would return "15.8".
- STRING	Return

GetHumidityWhole

	GetHumidityWhole
Gets the whole number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 15.
- INT	Return

GetTempFloat

	GetTempFloat
Gets the temperature returned by calling SampleSensor as a floating point number. If temperature is 15.8 degrees C then this function would return 15.8.
- FLOAT	Return

GetTempReal

	GetTempReal
Gets the real number portion of the temperature returned by calling SampleSensor. If temperature is 15.8 degrees C then this function would return 8.
- INT	Return

GetTempString

	GetTempString
Gets the temperature returned by calling SampleSensor as a string. If temperature is 15.8 degrees C then this function would return "15.8".
- STRING	Return

GetTempWhole

	GetTempWhole
Gets the whole number portion of the temperature returned by calling SampleSensor. If temperature is 15.8 degrees C then this function would return 15.
- INT	Return

SampleSensor

	SampleSensor
Communicates with the DHT11 sensor and receives the temperature and humidity readings. Returns 0 for success, 1 for no communication detected and 2 for checksum error.
- BYTE	Return

Property reference

	Properties
	SIG Pin
Microcontroller I/O Pin connected to the DHT11 sensor data pin.
	Use Checksum
The checksum value is used to ensure the data being received is correct. Yes = Only receive data if checksum is correct No = Ignore checksum
	Advanced Settings
	Clock Adjustment
On 8-bit PIC devices the timings can be a little tight as slower clock speeds and so we implement an adjustment factor to allow the sensor to function. Auto mode will attempt to automatically calculate a correct adjustment factor. Manual mode will allow you to set your own adjustment factor.