*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.
*hass0.pyrocufflink.blue* is a virtual machine that runs Home Assistant.
It is dual-homed on the *pyrocufflink.blue* network and the isolated IoT
network.
