Nicotine electronic vaping devices having dryness detection and auto shutdown

A method for controlling a nicotine electronic vaping device including a heater to heat nicotine pre-vapor formulation drawn from a nicotine reservoir, the method comprising:

• determining a plurality of resistance values for the heater during a time window;
• calculating a percent change in resistance of the heater between a first of the plurality of resistance values and a second of the plurality of resistance values;
• detecting whether the percent change in resistance of the heater exceeds a percent change in resistance threshold;
• and
• outputting an indication of dry puff conditions at the nicotine electronic vaping device in response to detecting that the percent change in resistance of the heater exceeds the percent change in resistance threshold.

A nicotine electronic vaping device comprising:

• a nicotine reservoir storing nicotine pre-vapor formulation;
• a heater configured to heat nicotine pre-vapor formulation drawn from the nicotine reservoir;
• and
• processing circuitry configured to
• determine a plurality of resistance values for the heater during a time window,
• calculate a percent change in resistance of the heater between a first of the plurality of resistance values and a second of the plurality of resistance values,
• decide whether the percent change in resistance of the heater exceeds a percent change in resistance threshold, and
• disable power to the heater in response to deciding that the percent change in resistance of the heater exceeds the percent change in resistance threshold.

A nicotine electronic vaping device comprising:

• a nicotine reservoir storing nicotine pre-vapor formulation;
• a heater configured to heat nicotine pre-vapor formulation drawn from the nicotine reservoir;
• and
• processing circuitry configured to cause the nicotine electronic vaping device to
• determine a plurality of resistance values for the heater during a time window,
• calculate a percent change in resistance of the heater between a first of the plurality of resistance values and a second of the plurality of resistance values,
• detect whether the percent change in resistance of the heater exceeds a percent change in resistance threshold, and
• output an indication of dry puff conditions at the nicotine electronic vaping device in response to determining that the percent change in resistance of the heater exceeds the percent change in resistance threshold.