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Old 09-14-2009, 01:11 PM   #11 (permalink)
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Old 09-26-2009, 09:50 PM   #12 (permalink)
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Is it possible to have a l/100km reading?

I know that 235.2/MPG = L/100km

Can be possible to modified it to have this reading?

Last edited by AlainB7; 09-27-2009 at 12:16 AM..
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Old 10-14-2009, 02:42 PM   #13 (permalink)
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Quote:
Originally Posted by AlainB7 View Post
Is it possible to have a l/100km reading?

I know that 235.2/MPG = L/100km

Can be possible to modified it to have this reading?
I'm rewriting the code (based on 0.75m) for european use (L/100km etc). It may be alpha, because I can not test it because of weather atm (motorcycle..).

If someone wants to test it, I will send it to you with pleasure! Then I could correct issues if there are any.. It's also supporting a temperature sensor, if you want to use one.

Last edited by Sebastian; 10-14-2009 at 03:04 PM..
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Old 10-28-2009, 05:41 AM   #14 (permalink)
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I've been waiting my MPGuino-kit from Fundamental logic for 11 weeks and I'm starting to believe that my package is lost forever. I paid 39 dollars for nothing.
Trying to save gas seems to be expensive.

So I read about the Arduino, and realized that it can be used in many other applications than just mpg computer. Only have to learn some programming or to find ready solutions from the net. Plus some external electronic components, ofcourse.
Anyway I've always wanted to try microcontroller stuff and this Arduino seems to be quite easy way to start.
So today I ordered Arduino Duemilanove Atmega328 and this time from my home country so that it hopefully will not get lost on the way.

How much kb's does the 0.75 version for kilometers need?
Should fit easily to Atmega328, I think, since it has more memory than Atmega168?
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Old 11-02-2009, 06:07 PM   #15 (permalink)
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Quote:
Originally Posted by Sebastian View Post
I'm rewriting the code (based on 0.75m) for european use (L/100km etc). It may be alpha, because I can not test it because of weather atm (motorcycle..).

If someone wants to test it, I will send it to you with pleasure! Then I could correct issues if there are any.. It's also supporting a temperature sensor, if you want to use one.
I would like to test it.

How I test it? You send the code to dcb and I buy a preasamble kit from im with your code in it?
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Old 11-03-2009, 02:32 AM   #16 (permalink)
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Would be possible, but I don't know if he simply can flash a 0.75
version. If I'm right, he don't uses the original Arduino system
anymore. Also, there should be an error in the code, you would have to
send the unit back to him for a new software version or find someone who
can program it. It has no USB port!
So I would recomend to build your own MPGuino from an Arduino board.
It's simple. If you send me your mail adress, I can give the software to
you. You may want to comment out both of the "#define _funktion"
directives in top of code (_temperature and _lambda) if you don't use an
LM135, 235 or LM335 temperature sensor or lambda readout. Also, there is
a little tricky think to mention: My parameters list (saved from
setup-menue) is not compatible with original code. I removed all of the
unused variables so I don't confuse the users more then neccesary. That
means, if there was an original software on your unit, you first have to
clear the memory or rewrite it with the new parameters. And same in
other direction. Else it will read / write to undefined adresses and
mess up the running program.
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Old 11-10-2009, 11:29 AM   #17 (permalink)
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L/100 KM, and Metric Update

I upgraded my MPGuino to the Atmel 328 (double the memory).

Here's the latest version (0.79), which uses the 013 IDE which supports the 328. It features L/100KM, KM/L, RPM, Distance, etc. And it saves the current Tank readings when you stop the vehicle ... handy for when you update the software. I also included some data acquired from a short trip in my 95 Neon, for your interest.

This version contains a new method for calibration, it isn't fully debugged though. Instead of the mathematical method to adjust calibration, it displays the current Kilometers or Litres and you are simply to adjust to the readings from your odometer or the gas pump.

I've been playing around with accelerometers and GPS, and plan to extend this project to collect more statistics and store them on a memory card.
Attached Files
File Type: zip mpguino079_data.zip (36.0 KB, 170 views)
File Type: zip MPGuino079metric.zip (15.0 KB, 178 views)
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Old 11-10-2009, 12:50 PM   #18 (permalink)
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Fine, if I count them right now we have 3 L/100km versions

Two points to you:
.) I think the rpm function was disabled because it varies to much. Do you get a steady reading in your car?
.) Why are you not using Arduino 17?
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Old 11-10-2009, 01:26 PM   #19 (permalink)
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Three versions LOL

Agreed that 3 versions is not useful but each has something to contribute ... not just metric, but other additions too? In that light, I will check out the other versions more carefully

I found bugs in my original post (.77m) thought it would be nice to post a corrected version. If I should be posting in some other manner, I welcome your suggestion please.

RPM seems stable and correct in my vehicle.

IDE 17 - sure, why not - it's just that when I got the 328 a few months ago, I didn't hit on the latest version.

What's your opinion of replacing the hard-to-understand integer math functions with the regular math library?
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Old 11-10-2009, 01:37 PM   #20 (permalink)
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Quote:
Originally Posted by mluckham View Post
Agreed that 3 versions is not useful but each has something to contribute ... not just metric, but other additions too? In that light, I will check out the other versions more carefully
This was not meant in negative way Of course I'm also reading every other source code in hope to find better ideas.

Quote:
What's your opinion of replacing the hard-to-understand integer math functions with the regular math library?
I'm not shure which "standard 64 bit math" library is meant. Is normal x * z 64 bit in arduino?
But if there is a faster one I would use it, because space is no problem with an ATMega328.

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