The best Wi-Fi temperature and humidity sensors for Home Assistant
Wi-Fi temperature and humidity sensors do not require a hub. They connect directly to an access point and configured using a built-in web server or an app.
Integration: Wi-Fi
The best Wi-Fi door/window sensors for Home Assistant
The devices featured in this list of the best Wi-Fi door/window sensors for Home Assistant don’t need any hubs and can be directly connected to Wi-Fi.
Making a dumb doorbell smart using a Shelly 1 and Home Assistant
The Shelly 1 will allow you to keep your old doorbell and chime but will notify Home Assistant whenever someone is at the door.