One of the most common reason why your voice assistant isn't doing what you asked it to do has to do with the naming of the devices. The most common reason for this has to do with the naming of devices. Use the app that comes with the relevant smart home device to make sure that it is set up using the correct name. If it is, make sure that it is actually compatible with your voice assistant without the need for a hub, or that you have the hub. Check the Settings page of your voice assistant's app to see if the system has detected the device on your network, and what the name is. An icon will represent the type (lightbulb, thermostat, etc.)In the case of Alexa, you might also find that you need to control it using a specific Skill - check whether you need to install a Skill, and if you need to mention it when addressing the assistant, e.g. "Alexa, tell Harmony to turn on the TV."