[Ovmsdev] OVMS v3

Collin Kidder collink at kkmfg.com
Thu Oct 16 21:47:49 HKT 2014

Yes, it seems like it is always a pain to find exactly what you want.
That's actually why the GEVCU hardware is custom made. We didn't find
anything we really liked either. But, the good news is that you do have
options. The MBED system you were looking at is very nice. We have the
GEVCU hardware. I don't see any reason that you could not retrofit
something from either of them. Yes, the cost of the GEVCU hardware is
expensive but the design is open. You can make modifications and then build
them in China as cheaply as possible. The version 6 design of GEVCU should
have the capability of bluetooth and wifi as well as an SDCard. There are
lots of great MBED designs you could modify as well. So, options exist.
But, unfortunately you might be stuck building your own hardware to fit
your needs. I'm just not sure that anything exists that matches your needs
closely enough.


On Wed, Oct 15, 2014 at 11:04 PM, Mark Webb-Johnson <mark at webb-johnson.net>

> Kevin,
> An Arduino Due clone is about US$30, and a dual CAN bus shield about US$25.
> But, that doesn't solve the Bluetooth, Wifi, GPS, GPRS, etc, issues.
> The problem we are seeing is that while the hardware seems trivial, it is
> proving to be impossible to find. Refer back to the original list:
> • 32bit CPU with enough grunt, and a low-power sleep mode
> • Dual CAN
> • Async + I2C + SPI + GPIO expansion
> • SD-Card
> • USB
> • Lots of RAM and FLASH
> • Wifi
> • Bluetooth
> • Optional GSM
> • Optional display (or can we get away with bluetooth to a cellphone?)
> That is what we need. Finding it in a low-power, low-cost, framework is
> proving impossible. It seems that we are just too early, and I suspect than
> in a couple of years this will actually be trivial. While GEVCU comes
> close, the US$600++ pricetag is just too high. The EVTV kit doesn't even
> come close but still costs eight times what we have now.
> Regards, Mark.
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