[Ovmsdev] GEVCU 5 hardware

Mark Webb-Johnson mark at webb-johnson.net
Thu May 15 20:13:37 HKT 2014


Do you have anything on target pricing for GEVCU v3?

While there is some synergy between the two projects, when I looked at GEVCU v2 last year, my three biggest concerns were:

I/O: GEVCU was more about digital I/O and PWM, while OVMS needs a bunch of different comms options (mostly async).

Price: GEVCU retails for US$595 (vs US$99 for OVMS v2).

Power consumption: In general, units like GEVCU are designed to be on when the car is driving or charging, and off at other times. Doing telematics separately seems a sensible approach.

I was wondering about a hybrid approach. Some of the GSM units (like the SIMCOM OVMS uses) can run user programs alongside the traditional modem and have I/O. All the telematics could run on such a processor (always on) and an I/O line could be used to wake up the GEVCU if required. But, such an arrangement would be far from trivial and a stretch for a hobbyist approach. A dual-processor, dual-firmware, system is much more complex to maintain and keep up-to-date.

Regarding full linux boxes (like raspberry pi, beagle bone, etc), my concern is power consumption. It would be wonderful to have a linux base, but the overhead is horrendous.

Regards, Mark.

On 15 May, 2014, at 6:55 pm, Kevin Sharpe <kevin.sharpe at zerocarbonworld.org> wrote:

> Hi Rob,
> I’ll send a complete GEVCU 5 hardware list when I get a moment. It’s based on a Arduino Due architecture with a 84Mhz 32-bit microcontroller :-)
> Here’s a link to the enclosure which is IP67/69 (submersible!)
> http://www.cinch.com/products/modular-integrated-connector-enclosure
> <MODIce_enclosure.png>
> Kevin Sharpe | Founder & Patron | Zero Carbon World is a UK Registered Charity #1141347
> From: Robert Sharpe <robert.sharpe at evergreen-consulting.co.uk>
> Reply-To: OVMS Developers <ovmsdev at lists.teslaclub.hk>
> Date: Thursday, 15 May 2014 11:31
> To: OVMS Developers <ovmsdev at lists.teslaclub.hk>
> Subject: Re: [Ovmsdev] GEVCU 5 hardware
> Hi Kevin,
> It seems sensible to assess the opportunity.
> If someone more informed than me can list the relative features, potential and cost of the two units then that would put us in a better position to comment.
> Regards,
> Rob
> ---- On Thu, 15 May 2014 11:00:50 +0100 Kevin Sharpe <kevin.sharpe at zerocarbonworld.org> wrote ---- 
>> Version 5 of the Generalised Electric Vehicle Control Unit (GEVCU) will include BT, WiFi, and isolated I/O in a low cost and rugged automotive enclosure. Many of the things on my OVMS wish list!
>> GEVCU development is progressing well and I’ve suggested they add GPS as an option in the final version;
>> https://groups.google.com/forum/#!forum/gevcu-development
>> Would their be any interest in porting OVMS to the GEVCU hardware? Or even in merging the projects possibly?
>> I ask this because the more resources we can bring to the project the more likely it is to flourish.
>> Kevin Sharpe | Founder & Patron | Zero Carbon World is a UK Registered Charity #1141347
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