Aerosol generating apparatus and method of controlling the same

An aerosol generating apparatus comprising:

• a cartridge configured to accommodate an aerosol generating material;
• a processor;
• and
• an electronic circuit connected to the cartridge and the processor,
• wherein the processor is configured to detect a remaining amount of the aerosol generating material by using a fixed resistor included in the electronic circuit, the fixed resistor being connected between a first terminal and a second terminal, and the remaining amount is detected based on a voltage value across the fixed resistor,
• wherein a resistance value of the fixed resistor is independent of a temperature of a heater included in the cartridge,
• wherein the electronic circuit includes a third terminal for transmitting a first signal for controlling power supplied to the heater of the cartridge, and a fourth terminal for transmitting a second signal for controlling power supplied to the fixed resistor,
• wherein an amount of power applied according to the first signal is different than the amount of power applied according to the second signal,
• wherein the first signal and the second signal are provided at different times, and
• wherein the processor is further configured to determine the remaining amount of the aerosol generating material corresponding to the voltage value across the fixed resistor based on a lookup table stored in a memory.