[Noisebridge-discuss] Open Source Bicycle Computer...

[Jonathan Foote]

Interesting -- I've used the ANT rf modules for a recent  project. I
knew they were in the Nike "smart shoes" but I didn't know about GPS
etc.  ANT seems to be widespread, and it's pretty efficient yada yada.
But the protocol is gnarly and they charge you $700+ for a
"development kit" that includes the documentation you really need to
use it. I got pretty far with the example code from Sparkfun.com, but
I wasn't doing anything fancy and I had control of both ends. Does
Garmin, etc. publish their interface?


On Sun, Oct 18, 2009 at 3:16 PM, dpc <weasel at meer.net> wrote:
> Jonathan Foote <jtfoote at ieee.org> writes:
>
>> I'm pretty sure bike computers use Hall effect sensors to
>> (contactlessly) sense wheel revolutions.
>
> yep. the magnets/sensors are all basically standardized now. the mount
> to the computer is what differs.
>
>> Also consider interfacing with a GPS module, which are relatively
>> inexpensive and pretty simple to talk to over a serial line.
>
> there's an 'open' standard called ant+ taht a lot of sports 'monitor'
> bits use these days. i think it started w/ garmin, but they've gotten
> most of the other people (at least in cycling) to sign-on.
>
>  http://www.thisisant.com/products/data-sheets-brochures
>
> seems to be the jumping off point.
>
> \p
>
> ---
> Plan to throw one away. You will do that, anyway. Your only choice is
> whether to try to sell the throwaway to customers. - Frederick Brooks
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