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{| width="50%" |- | width="20%" style="color: gray;" | Author | Matrix TSL |- | width="20%" style="color: gray;" | Version | 1.2 (Release) |- | width="20%" style="color: gray;" | Category | Grove |} ==[[File:Component Icon 0689100f_8b13_45a6_98a2_b9833b02eed5.png|Image]] Temp Humidity DHT22 (101020019) component== The DHT22 temperature and humidity sensor is a popular sensor allowing the ambient temperature and relative humidty to be monitored digitally. Humidity Range = 0% - 100% +/- 2% Temperature Range = -40 - 80 Degrees C +/- 0.5 Degrees C ==Examples== ''<span style="color:red;">No additional examples</span>'' ==Downloadable macro reference== ===<span style="font-weight: normal;"><u><tt>GetTempWhole</tt></u></span>=== 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. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|INT]] ===<span style="font-weight: normal;"><u><tt>GetHumidityFloat</tt></u></span>=== Gets the humidity returned by calling SampleSensor as a floating point number. If humidity is 15.8 % then this function would return 15.8. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|FLOAT]] ===<span style="font-weight: normal;"><u><tt>GetHumidityString</tt></u></span>=== Gets the humidity returned by calling SampleSensor as a string. If humidity is 15.8 % then this function would return "15.8". '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|STRING]] ===<span style="font-weight: normal;"><u><tt>GetTempString</tt></u></span>=== Gets the temperature returned by calling SampleSensor as a string. If temperature is 15.8 degrees C then this function would return "15.8". '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|STRING]] ===<span style="font-weight: normal;"><u><tt>GetHumidityWhole</tt></u></span>=== Gets the whole number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 15. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|INT]] ===<span style="font-weight: normal;"><u><tt>GetTempReal</tt></u></span>=== 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. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|INT]] ===<span style="font-weight: normal;"><u><tt>GetHumidityReal</tt></u></span>=== Gets the real number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 8. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|INT]] ===<span style="font-weight: normal;"><u><tt>SampleSensor</tt></u></span>=== 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. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|BYTE]] ===<span style="font-weight: normal;"><u><tt>GetTempFloat</tt></u></span>=== 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. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|FLOAT]] ==Simulation macro reference== ''This component does not contain any simulation macros'' ==Property reference== <span style="font-weight: normal;"><u>SIG Pin</u></span> This property is of type ''Single digital pin'' and can be referenced with the variable name ''dpin''. Microcontroller I/O Pin connected to the DHT11 sensor data pin. <span style="font-weight: normal;"><u>Use Checksum</u></span> This property is of type ''True or false'' and can be referenced with the variable name ''csum''. The checksum value is used to ensure the data being received is correct. Yes = Only receive data if checksum is correct No = Ignore checksum

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