Using MQTT to create lights and with emulated_hue it’s possible to control almost any device you can write a script for. e.g. want to turn your monitor off with an “alexa bed time” routine? It just requires some bridging.
So what this code does ( GitHub - sweharris/mqttlight_bridge ) is to abstract out the MQTT/HA interface and provide a simple stdin/stdout interface so it’s very simple to add devices to HA, and then onto Alexa/Google.
If you can script it, you can control it 