I have been searching for ascii graph chart tools, this is what I have found some of them highly specific for a special purpose, like monitoring virtual machines, a funny fact is the author of asciivmssdashboard has written a great looking tool using ncurses. The screenshot shows an IP address belonging to Microsoft. 104.40.0.0/13, asking myself if this tool does show HyperV hosts? Also the OUI of the MAC address also belongs to Microsoft 00:0d:3a.
Finally found out the tool for my own purpose will be gnuplot.