Domoticz is a Home Automation system design to control various devices and receive input from various sensors.
For example this system can be used with: 

* Light switches
* Door sensors
* Doorbells
* Security devices
* Weather sensors like: UV/Rain/Wind Meters
* Temperature Sensors
* Pulse Meters
* Voltage / AD Meters
* And more ...


The MQTT broker mosquitto is integrated into the package. It requires its own domain or subdomain. It's an optional setting: during install if you set the same domaine as your main app domain, it won't be installed.