Which of the following home automation platforms does not support Wi-Fi devices?

Iris and Nexia are home automation platforms that primarily focus on a variety of communication protocols, such as Z-Wave and Zigbee, which are often geared towards device types that do not necessarily rely on Wi-Fi connectivity. These platforms serve as central hubs for smart home devices, allowing for automation and control through wired communication methods, which can offer improved reliability and energy efficiency compared to Wi-Fi. In contrast, SmartThings, Google Home, and Amazon Alexa integrate Wi-Fi devices extensively, enabling users to control a wider range of smart products through their respective applications or voice command features.

Choosing Iris and Nexia as those that do not support Wi-Fi devices reflects their design as hubs that utilize other protocols for device connectivity, thereby emphasizing the importance of diversifying device compatibility when setting up smart home systems.