Patent ID: 8274384

Claim:
An information device capable of performing wireless communication with a reader/writer device, the information device comprising: a reception section which, when activated, detects information request signals transmitted from said reader/writer device; a transmission section which, when activated, transmits a response signal to said reader/writer device in response to the detection of a respective information request signal by said reception section; a detection data acquisition section which, when activated, acquires detection data corresponding to a physical quantity or state from a sensor for detecting said physical quantity or state; a detection data storage section which holds the detection data acquired by said detection data acquisition section; a first control section which activates said detection data acquisition section at a first time period so that the data detection acquisition section thereby acquires the detection data at the first time period, the detection data being acquired at the first time period being held by said detection data storage section; and a second control section which activates said reception section at a second time period so that the reception section thereby detects the information request signals at the second time period, and, when a respective information request signal is detected by the reception section, activates said transmission section so that the transmission section thereby transmits the response signal to said reader/writer device, the transmitted response signal including the detection data held in said detection data storage section; and a third control section which adjusts the first and second time periods independently of each other in accordance with a number of times that the information request signals are detected by the reception section.