The graphing scripts can be obtained via the link in the first post in this message:-
Huawei HG612 Modem Graphing Scripts
There is a basic Linux snapshot graphing script along with Windows snapshot AND 24/7 automated monitoring script.
If using the 24/7 logging, be sure to read the setting up instructions to make the whole setting up process just take a few minutes.
Everything needed is now included in the downloadable zip file HG612_wingraphs.zip