Given the importance of Tesla's Roadster for changing the way the general public thinks about electric cars, it's a little strange that owners have been left in the dark as far as a dedicated smartphone app is concerned.
For those (most) of you without car hardware yet, we see you are using the DEMO car to try out the Apps. Thanks for your assistance with this, and please let us know if you have any problems, or can suggest any improvements.
In the meantime, we've put a little 'spice' into the demo car.
We found that the short stubby antennas found on most USB modems were just not good enough (particularly when placed in the passenger footwell of the car). Mounting the box behind the passenger/driver seat is a possibility, but requires laying cable and makes the whole unit vulnerable to theft.
The solution we found is a short flat adhesive antenna specifically designed for in-vehicle applications. The cable runs through the fuse box area of the car, and down to the passenger foot-well. It is not too difficult to lay this (once you know how).
Here are some snapshots of the V1 in-car-module. Design is finalized, and in production now. Only change on production version (vs these) is some re-arrangement of the connector orientation and case holes.