Control method, controller, and non-transitory recording medium

A method of controlling a plurality of equipment pieces by a controller including a microphone, a sensor, and a speaker includes collecting, with the microphone, sound around the controller, sensing, with the sensor, a location of a person with respect to the plurality of equipment pieces, generating sensing data based on the sensing, extracting an utterance for controlling the plurality of equipment pieces from the sound collected by the microphone, in accordance with the utterance, identifying a target equipment piece to be controlled among the plurality of equipment pieces, determining whether to control the target equipment piece based on the sensing data, when the control equipment piece is determined to be controlled, generating an audio response for verifying whether to control the target equipment piece in accordance with the utterance, and causing the speaker to output the audio response.