The Fluksometer, a Dragino/openWRT router based energy monitoring appliance by default only offers a built-in MQTT monitor that does "not better" than using mosquitto directly to get hands on consumption values. As the built-in configuration web front-end uses AngularJS, this quite easily can be altered to also offer some visualization capabilities for the measured energy flow. My github repository https://github.com/gebhardm/flmlocal offers an expandable solution to locally serve different visualization alternatives: A gauge, a graph, a panel, and a chart retrieval for locally stored consumption values. This enables a cheap home energy display using a 70Eur Android tabled connected to the LAN. And as all consumption values are actually "just" MQTT messages, this can be "infinitely" extended to also show humidity, temperature, etc. using an easy Arduino based MQTT publisher.
All installation details may be obtained from the Github ReadMe I supplied.