Fecha de publicación: 21/06/2021 Fuente: Wipo "IOT" The present invention relates to a technology by which an IoT gateway generally integrally controls legacy devices in an IoT service environment. In particular, the present invention relates to an integrated IoT control technology based on device state recognition, by which IoT controllers, which recognize operating states of legacy devices by the patterns of recognition elements (body vibration and operation noise), and convert a device control command for an IoT gateway into a remote control signal for the legacy devices with reference to the operating state, are attached to the legacy devices, respectively, so that the IoT gateway integrally controls various types of legacy devices, produced by various companies, in an IoT service environment. In accordance with the present invention, the IoT gateway can integrally control various types of legacy devices, produced by various companies to have different technical specifications and control methods, in an IoT service environment without functional errors. Therefore, the legacy devices can also be used in IoT services so that the variety of user experiences for the IoT services can be expanded. In addition, the initial investment burden of IoT service providers for IoT service dissemination can be reduced so that loT service launching can be activated. COPYRIGHT KIPO 2022