[Ovmsdev] OVMS v3
nshishkov at yahoo.com
Sat Jun 21 05:36:07 HKT 2014
Have you seen these guys?
This is does not appear to be open source, but maybe there are some indications as to what kind of hardware they are using?
On Friday, June 20, 2014 10:59 PM, Marcos Mezo <mmezo at selexco.net> wrote:
no really knowing at all about all this, but... Have you heard
about the Raspberry Compute Module?
It's basically the Raspberry A on a module + 4Gb Flash. I think
it's design is open and the page says it will sell for about 30$
in batches of 100, a bit more for individual purchases. It has
internal 4Gb Flash and 512Mb RAM and a 32bit CPU ). All the gpios
and everything else are routed to a SODIMM connector.
I've read in the product documentation  that internally, the
broadcom chip does not power at all it's different parts or
modules unless they are beeing used, so if no 3D is used this part
of the chip is not powered and draining any power...
Theres is still no CAN or Wifi or bluetooth, but maybe that could
be in the "mainboard". There could even be different mainboards
with/without Wifi or 3g...
Just my 2c in case it can be useful.
* For me, the requirement comes down to a base framework and module that supports:
> * 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?)
> * What is interesting is the advent of low-cost Linux frameworks that are very close to what we need. Things like the BeagleBone and RasberryPi are fascinating, but really designed for HDMI video output - and the overhead of GPU + HDMI is a huge power drain. The closest I've found to what we require is (http://compulab.co.il/products/computer-on-modules/cm-t335/) - pretty amazing little device - low power, wifi+bluetooth, dual CAN, up to 512MB RAM and 1GB FLASH, for around US$50 (in horrendous quantities). I'm working with my contacts in China to see if we can base on a dev board something like that. If they can make Android phones for US$50, we should be able to get the guts of such a device for something similar. Then, add on GSM, take it from a BOM to a product, and we're probably looking at something still <US$150 but with so much more. The closest thing to ideal I've found at the moment is build a baseboard (connectors, power, CAN buses, etc) and
have slots to take that CM-T335 module and an optional GSM module. But, I still think we can find something on the China market even closer to what we want/need.
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