Wednesday, 9 May 2012

Friday, 4 May 2012

I heart Google charts

I just got a little server together to serve up the data that my sensor logger is collecting.  The Google chart API makes it very easy to create a fancy zoomable time-series chart (link goes to Google documentation as my server is not accessible to the outside world).  

The code is all on my github at  It's not much good without a serial-connected Arduino piping it data, I'm afraid!  However, it does show how to put together a minimal tornado server in a virtualenv that can serve up static content and a RESTful JSON API.

Thursday, 3 May 2012

First data

I just took the first dump of the data from my wireless sensor node, which logs temperature in our apartment.  It seems to be working pretty well, logging once every 4 minutes or so.  You can clearly see that last night was a few degrees colder than the night before and I think the uptick at the end is when we started cooking!

The electronics are based on a project by one of my colleagues.  It all fits in a laser cut enclosure that I designed.

Tuesday, 1 May 2012

New instructable: Building a laser cut box with living hinge

I just posted a new instructable detailing how I made the box in the picture.  It all started out as a flat piece of cedar plywood!