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garygid
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sat Aug 20, 2011 9:16 pm

Yes, we are working on using a display that includes a micro-SD card.
When we are able to write a file to that card, we will be able
to do one-bus CAN logging right "inside" the SOC-Meter.

Cheers, Gary
Last edited by garygid on Tue Oct 11, 2011 8:16 pm, edited 1 time in total.
See SOC/GID-Meter and CAN-Do Info
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evnow
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 10:37 am

TonyWilliams wrote:
mogur wrote:I'd prefer to see range expressed at a function of M/KwH which is much more of an absolute. Perhaps you could add that in parentheses after the speed if you anted to display both...
Ditto... speed and m/kWh.
Image

Using a button we should be able to change to different display pages - with details like Voltage & Power.

The other thing I'd like to figure out is the "run rate" i.e. the rate at which SOC is dwindling. We could use the last 15 minutes or so to get an idea of current m/kwh going rate and derive a range better than the guess-o-meter.
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garygid
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 10:54 am

I think 15 minutes will be too long.
Something more like 30 seconds is probably better.
See SOC/GID-Meter and CAN-Do Info
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evnow
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 11:28 am

garygid wrote:I think 15 minutes will be too long.
Something more like 30 seconds is probably better.
But that would change the range too quickly (like the intial Leaf range display). Yes, we will have to get to some happy medium (5 minutes ?).

BTW, is there a way to keep track of the time using the time stamp of the SOC messages ?
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TomT
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 11:31 am

5 minutes sounds like a good compromise to me.
evnow wrote: But that would change the range too quickly (like the intial Leaf range display). Yes, we will have to get to some happy medium (5 minutes ?).
BTW, is there a way to keep track of the time using the time stamp of the SOC messages ?
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evnow
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 11:40 am

garygid wrote:Yes, we are working on usig a display that includes a micro-SD card.
When we are able to write a file to that card, we will be able
to do one-buss CAN logging right in the SOC-Meter.
Exactly - we just need to find the right display. I had looked at some of them - either the display was too small or some other problem.

Found anything good ?

Hmmm ... may be this ...

http://www.adafruit.com/products/358

"1.8" 18-bit color TFT LCD display with microSD card breakout - ST7735R"

Image

Image

It is about the same size as 6610, has TFT and comes with microSD.

This looks like better value than 6610 !
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gascant
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 2:11 pm

Looks pretty sweet to me! Now, if it just comes in OLED.......
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evnow
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 4:29 pm

gascant wrote:Looks pretty sweet to me! Now, if it just comes in OLED.......
There is an OLED one - but it is too tiny. Just 1".

http://www.sparkfun.com/products/8538

Image

An OLED display with SD would be great as the current consumption would be much less.
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TomT
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 5:12 pm

Do we REALLY care what the current consumption is? 50ma, 5ma; what real difference does it make in the overall scheme of things? It's nothing...
evnow wrote:
gascant wrote:Looks pretty sweet to me! Now, if it just comes in OLED.......
There is an OLED one - but it is too tiny. Just 1".

http://www.sparkfun.com/products/8538

Image

An OLED display with SD would be great as the current consumption would be much less.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
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evnow
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Re: LEAF SOC gauge with Nokia 6610 LCD display

Sun Aug 21, 2011 5:15 pm

mogur wrote:Do we REALLY care what the current consumption is? 50ma, 5ma; what real difference does it make in the overall scheme of things? It's nothing...
This is not for car efficiency - but for the handling ability of the AVR-CAN we are using (and the CAN bus itself).
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