Turbo3
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Posts: 2011
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Thu Sep 06, 2012 10:59 pm

Here are the five new cases made today plus the one from yesterday surrounded by the OBDII connectors that were also modified today.

Image

Jim

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TomT
Posts: 10642
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Thu Sep 06, 2012 11:01 pm

Looking good!
Turbo3 wrote:Here are the five new cases made today plus the one from yesterday surrounded by the OBDII connectors that were also modified today.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

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garygid
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Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Sat Sep 08, 2012 9:51 pm

Tony Williams needs to borrow some GID-Meters to instrument the
Leafs as they drive the range test this next Saturday in Phoenix.

Jim, I sent you a PM.

Thanks to anybody who can help.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
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Turbo3
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Posts: 2011
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Mon Sep 10, 2012 9:37 am

The last couple days I have been working on making the DTE range user selectable on first power up or reset.

I finished the first version with user control last night. But not 10 minutes later I get a PM from LeafSwe with details about the Leaf energy display format Nissan uses in Europe. Which to my surprise is very different then what I get when I put a US Leaf into KM display mode.

Here is what the European Leaf display looks like.

Image

They use kwh/km which is the inverse of US Leafs so their energy scale moves in the opposite direction (lower is better).

What I have coded is km/kwh with a default range of “5 6 7 8 9” which corresponds to a EU range of “0.2 0.167 0.143 0.125 0.111”.

The simple solution is to just have a printed table the driver uses mapping km/kwh numbers to kwh/km numbers like in the sentence above. Displaying in kwh/km seems very difficult given my display space limits and the complexity of conversion.

Jim

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Delivery Date: 26 Mar 2011
Location: Ireland

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Tue Sep 11, 2012 6:58 am

UK owners seem to be unhappy with LEAF reporting and they often wondered if US style of miles per kWh could be displayed - so I think those would be happy with US meter.

Turbo3
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Posts: 2011
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Tue Sep 11, 2012 11:28 am

DTE energy range selection coding is complete. You are now able to change the default DTE format (English/Metric) and starting energy usage value (2.5 thru 7.5) upon first plugging in the cable or after pressing the Reset Button located on the back. Selection is made by cycling through the 22 choices (11 for each format) starting at the default value which will be 3.5 for English format and 5.0 for Metric format. When you reach the end of one table you switch to the other table.

Here are the complete tables for both English in miles/kWh and Metric in km/kWh plus a “for reference only” kWh/km table. The default selections are highlighted.

Image

Now back to assembly of the units.

Jim

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garygid
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Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Thu Sep 13, 2012 6:50 am

They often use fuel per 100 km.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

September
Posts: 62
Joined: Tue May 08, 2012 8:06 am
Delivery Date: 26 Mar 2011
Location: Ireland

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Mon Sep 17, 2012 8:37 am

We are a bit diverse:
Continent is liters per 100km
UK & Ireland is imperial mpg different from us mpg

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lemketron
Posts: 242
Joined: Mon Aug 02, 2010 10:46 pm
Delivery Date: 10 May 2011
Leaf Number: 1554
Location: Sunnyvale, CA

Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Thu Sep 27, 2012 1:00 pm

Turbo3 wrote:... A side benefit was four new screens for real time data. I just needed to come up with what to display on them. Just as I was finishing this code up Steve Lemke emailed me for a status update and a suggestion he came up with after seeing the new RAV4 EV maximum distance to empty screen. He suggested I add a screen where I calculated the maximum miles remaining based on current gids and a user selectable mile/kwh number. This sounded like something that could be added since it did not require any additional register space just some calculations and a screen to display it.

Rather than have the user select a miles/kwh number I decided to display a range of five values (4.0, 4.5, 5.0, 5.5, 6.0). With two digits for miles below each number so the driver can see the effect of different driving styles on the remain miles. The final format used the letter scheme for numbers above 99 which is not so important for miles but when I created a kilometer version seemed more useful. Also below 1 mile or km of range the display switches to “.x” to show the last few tenths available.

There are actually three of these “Distance to Event” screens as I am calling them (not to empty). The events are Low Battery warning, Very Low Battery warning and Turtle identified by the letters ‘L’, ‘V’ or ‘T’ in the left most position (at the 49,24,4 gids level).

Here is what it looks like:
Image
I have to say the DTE screens are awesome, just as I expected they would be. I leave mine on "T", showing my distance to turtle from 3.5 to 5.5 (though I might change that to 3.0 to 5.0 since that's a better match for my range of driving styles). I no longer care what the dashboard guess-o-meter says, though it is amusing to compare it to the WattsLeft numbers to see what the car projects my future energy economy will be. I can easily reset my dash Energy Economy indicator to get an idea what my current consumption average is, and (on the rare chance where it is warranted) I can adjust my driving style as needed. I even confirmed that the "L" values are exact, in that the car's Low Battery warning occurred at the exact same instant when the WattsLeft "distance to L" changed from 0.1 to 0. The best part is that I can now just stop worrying about range, since at any time I know (precisely) WattsLeft. :-)

After the 49.7 mile drive from Sunnyvale to Crissy Field last Sunday for National Plug-in Day, it was great to know that (after a brief session on the Nissan QC at the event) I did not need to drive conservatively on the way home. Instead, I was able to simply enjoy a long, beautiful, and fast (never mind how fast) drive back home on Highway 280 without any worries about the GOM or any battery warnings, let alone turtle. :D
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TonyWilliams
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Re: WattsLeft™ Monitor (Parallax SX28AC/DP SOC/CAN Project)

Mon Oct 01, 2012 11:38 pm

Is this product available?

Tony

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