*Mosquitto* implements an MQTT server. It is the recommended
implementation for using MQTT with Home Assistant.
I have added this role to deploy Mosquitto on the Home Assistant server.
It will be used to send data from custom sensors, such as the
temperature/pressure/humidity sensor connected to the living room wall
display.
The UniFi Security Gateway now provides DHCP for the Home Assistant
network. This simplifies management a bit, so I do not have to manage
three DHCP servers. The USG has firewall rules to prevent Internet
traffic.
The *hass-dhcp* role installs dnsmasq and configures it to serve DHCP
requests on the Home Assistant network. Since this network is not
routed, the regular DHCP relay/server setup will not work.
Dustin