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Originally Posted by NateSchiffer
Obviously you could make a ScanGauge-type device pretty easily, but what would people really want?
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There's already a few OBD2 apps.
Take a look at what they do, and what you could add.
A simpler set-up would probably sell better to the average Joe.
An extensive hypermiling feature set will sell better to the ecodriver's niche-market - but we're below the 1%-ers
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After all, the iPhone is a lot more capable: it has GPS, an internet connection, an accelerometer, a compass, and of course OBD2.
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The internet connection isn't always on or working though.
Don't fall into the developer's trap that the 'net always needs to be working for the app to function properly
Must haves :
- logging
- high frequency OBD polling, i.e. realistic measurements updates.
- % time and distance idling
- % time and distance in which gear
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how about a "drag gauge" that you enter your car's CdA and Crr?
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Not everybody has those figures.
Even a lot of us don't even have them.
CdA is relatively easy to find, but Crr ?
You could maybe built a feature that grabs the required time/speed data and calculates the drag ?
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Or a "hill-climb gauge" that shows how far you could coast up a hill (I'm always terrible at that).
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You'd need to have the topography of the road ahead, actual vehicle weight, RR, ... this would get complicated very quickly.