https://www.thingiverse.com/thing:2884823
I built one of these to monitor the status of a Lulzbot Mini using Octoprint as a server.
It uses a 3d printed case, less than $20 worth of parts and uses your wi-fi network to collect data from
your Octoprint Server. Even sets up its own web site on your network you use to configure the monitor.
It only needs 5 volts and access to your wi-fi network. It displays head and bed temps, percent complete, time left to complete etc.