A method, to facilitate communication by a machine, includes: receiving data transmitted from a reading/writing apparatus; detecting a data request signal; transmitting, to the reading/writing apparatus, a response signal responsive to the data request signal; acquiring, from a sensor, detected data indicative of at least one of a physical quantity and a physical state; storing the acquired detected data into a memory and setting thereafter a flag to a first state; transmitting the acquired detected data if the data request signal is detected and setting thereafter the flag to a second state; invoking an alarm if the flag is in the first state and a power switch is in an OFF state; and controlling the power switch to disconnect power from the power supply to the information apparatus if the flag is in the second state and the power switch is in the OFF state.