I wrote this script after our ISP complained we were using more than their "fair use policy" allowed. They sent me to their website where they had a bandwidth counter, but it didn't work because of the way we were connected (the ISP piggy-backed on another to serve our area)

So I wrote my own script to log into the router and work out how much we were really using.

From my "scripts" bzr (yes, remember that?) repo:

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revno: 32
committer: Matt Molyneaux <moggers87@m87.co.uk>
branch nick: scripts
timestamp: Fri 2010-10-01 01:20:35 +0100
message:
  added bandwidth.py
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It was also the first time I'd used BeautifulSoup and CSV. Still works too!

It takes a snapshot of bandwidth up and down. It then works out how it should add those numbers together (if the connection resets, the counters on the router get reset) and plots them on a nice bar chart.

The earliest month of data I have is from July 2011 (don't know what happened to the original data), in which the house used 22GB in total. Last month we used ~3 times as much :P