The control of the electricity, lights, air conditioning, heat and other factors in your home or small business can be done with services such as Google Home or Alexa or other services that are integrated with switches, plugs, LED bulbs and other items from various vendors, but are still under the control and access to Google and other closed vendors.
This has two main issues. You do not know what they are doing with your data and if your internet goes down you may not be able to control your house.
Home-Assitant.io is the second largest project in the free software space and you will be amazed at what it can do.
