Relative humidity sensor calibration

An integrated humidity and temperature sensor, comprising:

• a humidity sensor configured to output a signal corresponding to a first humidity value at a first time and a second humidity value at a second time;
• a temperature sensor configured to output a signal corresponding to a first temperature at the first time and a second temperature at the second time;
• a heating element configured to raise a temperature of the humidity sensor and the temperature sensor between the first time and the second time;
• and
• a processor device configured to determine a drift value of the humidity sensor according to the first and the second temperatures and the first and the second humidity values.

An apparatus comprising:

• a humidity sensor configured to output a signal corresponding to a humidity value;
• a temperature sensor configured to output a signal corresponding to a temperature;
• a heating element configured to raise a temperature of the humidity sensor and the temperature sensor;
• and
• a processor device in communication with the humidity sensor, the temperature sensor, and the heating element, the processor device configured to:
• measure a first humidity value at a first time;
• measure a first temperature at the first time;
• raise a temperature within the apparatus;
• measure a second humidity value at a second time;
• measure a second temperature at the second time;
• and
• determine a drift value of the humidity sensor according to the first and the second temperatures and the first and the second humidity values.