Project day

A busman's day off for me today. This has been gathering dust for a while so I forced myself to progress things... and the basic unit is now nearly working!

The Bluetooth worked first time and adding i2c to both ends of the dual processor didn't put up too much of a struggle. A couple of small tweaks and another half day should show whether it will actually detect anything. I hope so, then the fun board updates and mobile app stage can happen :-)