A line voltage smart thermostat can regulate the heating and cooling systems that run on the direct electricity of 240V of 120V, and allow to stay connected with the mobile app through Wifi connectivity. Electric baseboard heater is a known example that commonly used in the USA.
Some of the modern models are equipped with circuitry that captures the intermittent power from the red wire that charges the internal battery of thermostat. It means that can completely without C-Wire, but such there are only a few furnaces where red wire carries reasonable voltage that can charge the thermostat battery
Alexa enabled thermostats are getting a lot of attraction nowadays because it becomes so convenient to control temperature and related operations with voice. In this article, I list some of commonly used Alexa thermostat commands, you can use these existing command and can make your own through AWS Lambda console.
The Nest Learning Thermostat is a creation of Google Nest Labs, it’s a beautiful, easy to control, advanced and sudorific creation that study your home and leans your ways. There were many modern and hypothetical features that we just can imagine before the birth of learning thermostat, but thanks to nest it happens and technology lovers are enjoying them.