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DeaneG
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Sun May 19, 2013 1:17 pm

Maybe one of our talented EEs could measure the actual current draw of their ELM327 clone in operation, and also with the Leaf turned off, and post the results. We could at least get a rough idea using one of the clone types where it is easy to reach and modify the connector wiring.

My mini clone was noticeably warm after a few minutes of operation, so I assume its operating power consumption is in the 1-2 watt range.
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turbo2ltr
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Sun May 19, 2013 3:44 pm

I just tried a real ElmScan and a homebrew BT adapter and it seems to work well. Of course it's a bit more expensive than the ebay/china knockoffs.. heh.
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LEAFfan
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Sun May 19, 2013 5:08 pm

On one of the ELM website links someone posted, I saw one of them list 45mah when running, so with it just On, but not connected, it would be maybe half that?
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barsad22
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Tue Jun 04, 2013 3:29 pm

A few questions from a newbie who doesn't own a solder gun (I know, go ahead and laugh):

1. I want to buy an ELM327 device, and I see VGates v.1.5 and v.2.1 on eBay... is it OK to get the newest firmware version or will there be a problem with the Android app connection (any recommendations on best brands would help me, cost is not really an issue, I just want the most reliable). I plan to have an extension cord and unplug the device when it's not in use just to be safe about battery draw.

2. How much more info do I get from the EV Can vs. the Car CAN connection (modified vs. unmodified), and is the extra information pertinent to someone who's not into Excel sheets and logging? I really just want a good SOC& and real-time info on efficiency.

3. Since I do not trust myself to modify any electronics correctly, is there anyone who would be willing to modify my ELM327 for me?

Best,
Josh

P.S. -- The work you DIYers are doing is extraordinary and I applaud the innovation, esp. on the Android app.
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FairwoodRed
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Tue Jun 04, 2013 4:36 pm

barsad22 wrote:A few questions from a newbie who doesn't own a solder gun (I know, go ahead and laugh):

1. I want to buy an ELM327 device, and I see VGates v.1.5 and v.2.1 on eBay... is it OK to get the newest firmware version or will there be a problem with the Android app connection (any recommendations on best brands would help me, cost is not really an issue, I just want the most reliable). I plan to have an extension cord and unplug the device when it's not in use just to be safe about battery draw.

2. How much more info do I get from the EV Can vs. the Car CAN connection (modified vs. unmodified), and is the extra information pertinent to someone who's not into Excel sheets and logging? I really just want a good SOC& and real-time info on efficiency.

3. Since I do not trust myself to modify any electronics correctly, is there anyone who would be willing to modify my ELM327 for me?

Best,
Josh

P.S. -- The work you DIYers are doing is extraordinary and I applaud the innovation, esp. on the Android app.

Josh,

I wouldn’t worry about the current draw, unless your car will sit for several days. I’m targeting the EV CAN because I really like the GID values more than the SOC values. Both have a good resolution and an accuracy that is fine for me – I just prefer the GIDs. Turbo3 has plans to add EV CAN support to his app, possible later this month. It will be neat to see what he develops.

Modifying electronics is something that I get to do at my work from time to time, so I have ordered a set of the small, cheap, adaptors from China and I plan to modify them to look at the EV CAN. If all works out, I hope to be able to sell them for $15, also later this month. If you want something sooner, I’m willing to look into modifying yours. Just send me a good photo of the case so I can get a look at how hard it will be to open up. If you’re in the Seattle area, we could meet up and tackle it together (good conversation is all I’d need).

Mr. 54 in the 100 Mile Club

PS – version 1.5 seems to be a direct clone of the original, but 2.1 is unknown to me and not necessarily a follow on version. I’d stick with the 1.5

LEAFfan
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Tue Jun 04, 2013 8:44 pm

barsad22 wrote:A few questions from a newbie who doesn't own a solder gun (I know, go ahead and laugh):

1. I want to buy an ELM327 device, and I see VGates v.1.5 and v.2.1 on eBay... is it OK to get the newest firmware version or will there be a problem with the Android app connection (any recommendations on best brands would help me, cost is not really an issue, I just want the most reliable). I plan to have an extension cord and unplug the device when it's not in use just to be safe about battery draw.

2. How much more info do I get from the EV Can vs. the Car CAN connection (modified vs. unmodified), and is the extra information pertinent to someone who's not into Excel sheets and logging? I really just want a good SOC& and real-time info on efficiency.

3. Since I do not trust myself to modify any electronics correctly, is there anyone who would be willing to modify my ELM327 for me?

Best,
Josh

P.S. -- The work you DIYers are doing is extraordinary and I applaud the innovation, esp. on the Android app.
1. I recommend Vgate from Simvalley (Amazon $18) 1.5 because it has 4 screws to easily take it apart and install a DPDT switch for CAR & EV CANs. I've left mine plugged in over a month with not even .1V lost. Just make sure you exit the App each time.
2. I believe there will be much more info, but true Gids is certain.
3. If you ask Garygid, he may do it for you.
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Duncan
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Location: Sydney, Australia

Re: ELM327-type OBD Bluetooth devices for Android Apps

Wed Jun 05, 2013 6:50 am

Hi all,

I have finished wading through the 140 pages (interesting read) but only one person seemed to have the same issue I do.

Basically I have a generic (appears to be the larger 4 screw type) OBD adapter, and have tried both HTC Velocity and Sony Xperia Z phones.

Bluetooth connection is fine but the app sticks on "waiting for leaf data".

It looks like I should be looking for a bad connection to the CAN pins, or that the OBD adapter itself is faulty....sound about right? Interestingly I also cannot get data with the same reader from my Cube to Torque, I had assumed it was not OBDII compliant but maybe it is the device?

Thanks in advance :)

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garygid
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Wed Jun 05, 2013 7:19 am

Looking at the back side of the above-suggested device from Amazon:

http://www.amazon.com/Simvalley%2599-EL ... 558&sr=1-4" onclick="window.open(this.href);return false;

I see that the circuit board is not one of the two that I have had the
most experience using. Even with these pictures, you might order
and get something else, but I do not know. It might be great.
In my somewhat limited experience, it is difficult to tell.
Perhaps ask the seller.

The description says firmware 1.5, but difficult to tell.
There might even be several different 1.5 versions.

The 2.1 is software (for the PC?)
presumably supplied on the CD, which we do not use.

If you provide your location, city and state, in your profile,
it would be easier to suggest help for you.

GIDs come from the EV bus, and have not been discovered
on the CAR bus. They seem to be the best "fuel" gauge that
we have. The SOC is only an estimate of "tank fullness",
whereas GIDs estimate the amount of fuel in the tank.
Of course, these would be closely related if the "tank"
did not change capacity, and even gradually shrink
with age.

For any ELM327-type clone device:
Test it with the LEAF Battery App and the CAR bus.
If it appears to work consistantly, pairing easily, and
maintaining a solid connection, then...
Get somebdy (usually local to you) to modify it
from you.

I do not yet have a good solution for adding the slide
switch, but the EV modification is easy to do on these
"stubby" (not the mini, or the short) cases.

Possible modification suggestion:
If you want to buy two of these, and have them both shipped
to me, I will test them both, and notify one for EV instead
of CAR bus, test it again, and send the modified one to
you (in the USA?), keeping the other for my growing
collection of different types.
See SOC/GID-Meter and CAN-Do Info
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garygid
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Re: ELM327-type OBD Bluetooth devices for Android Apps

Wed Jun 05, 2013 7:32 am

Duncan,

Did the Elm device pair with the phone successfully?

Yes, some of these elm devices do not work well.

Was the car in Ready mode, so that the CAN buses would be active?

Are these phones listed in the Wiki as tested by others?

If you are located near other app-users, get together and swap parts:
(Oh, Australia, so not so many LEAF owners around.)

1. phone and elm that work.
2. your phone and the elm that works.
3. their phone and your elm.
4. your phone and your elm.

Or, send your elm device to someone who agrees to test it for you,
perhaps including $5 (or?) to help pay for the return shipping?
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
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Duncan
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Delivery Date: 01 Feb 2013
Location: Sydney, Australia

Re: ELM327-type OBD Bluetooth devices for Android Apps

Thu Jun 06, 2013 2:09 am

Thanks for the quick response Gary. The adapter pairs with both phones and my laptop fine. Neither phone is currently on the confirmed compatible list but I think it's very unlikely both phones are a problem. The issue is only with the app reading the CAN data.

2 of my 8 cars have ODB ports and this adapter does not work with either car (the other car is for the Torque app)

Unfortunately there are very few Leafs around, so I'll pull the adapter apart this weekend and see if I can spot anything physical, and then just try a different vendor.

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