You probably know how it is with projects - you're motivated at some point and then again totally lost focus and interest. And necessity is the mother of invention. This is not an excuse log. I'll always take a look at my projects and think about everyone for a minute.

There is a professional way to make this project and a diy/hackish-way to do it. This should probably be made with BTLE and be connected to your phone, but this would compromise my initial - off the phone - concept. I still have a BTLE dev kit - the wunderbar - with 6 sensor boards and one "mother"board somewhere and I feel like I owe them a project since I've won this and it's probably what they expected when they handed them out (because reasons). It's not that easy to hack, I guess. I'd have to work with the onboard BTLE chip and there are more people that are used to "work" with arduino.

I need a quick hacked together prototype to start writing some more code though. It should be something anyone can build with a few parts - basically a LiPo cell, a 5V boost converter and an arduino connected to a 1602 LCD character display with a hall effect sensor connected. I'm not happy with 5Vs though. the battery power should be measured with the arduino, too. This is a total waste of money in comparison to a 5 dollar computer and basically what I've achieved already. Next step would has to be logging. That's the killer-app / the pitch. Am I going in the right direction?

This feels like two projects! Damn! One is easy to hack together but not efficient, one is efficient but not easy to hack.

What should be the key point here?