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Author: Subject: New (Low cost) Datalogger for Megasquirt
irvined

posted on 3/7/11 at 02:27 PM Reply With Quote
New (Low cost) Datalogger for Megasquirt

Hello,

Having run with Microsquirt for a while now, one thing I felt that was lacking from the package was an easy way to log data. I could have bought a datalogger, but very few of them support megasquirt, and they tend to be expensive, especially since its not something I strictly need. I've been using Arduino for a few other gadgets recently and decided this would be a good base package for an automotive datalogger.

So, meet Loguino, an open source datalogger, with support for Megasquirt (and variants) and GPS support. The cost to build is around 100GBP and it will log to an SD card which you can plug into your PC and pull the data off. I'd love to hear from anybody who is interested in using it, either by email, pm, or ideally using the user group on the site.

It's not limited to megasquirt users, it already supports GPS and an accelerometer, and shortly will support analog inputs (pressure sensors, tps, etc) and a gyroscope.

The website is here: http://code.google.com/p/loguino/

Best regards


David





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ashg

posted on 3/7/11 at 02:51 PM Reply With Quote
why didnt you just buy a ms3? it has an sd slot and can datalog any item on the ms. also i think if you can get a gps gyro mdule that will output data in real time onto a canbus then ms3 will log that too.

good work though nice to see people going the extra mile.





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irvined

posted on 3/7/11 at 02:59 PM Reply With Quote
Nice as the MS3 is, I wanted a logger that worked with the MS I had, not the one I didn't hence why I built this, I also want one logger design for the various cars I drive rather than switching between various ones.

The geek in me wants my car to just upload its log data for analysis whenever its in range of the garage too, but that part is for another day.





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Confused but excited.

posted on 3/7/11 at 04:23 PM Reply With Quote
That sounds pretty cool to me. Nice one.





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matt_gsxr

posted on 3/7/11 at 06:17 PM Reply With Quote
Very nice work.
I am an Arduino and MS fan too, now I am drawn between the MS Android interface and this approach. Tricky.

What sampling rate can you get out of an Arduino? I assume combine the MS log and the additional parameters so that you are sampling at around 60ms.

Cool

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matnrach

posted on 3/7/11 at 06:44 PM Reply With Quote
Anybody seen this?
http://everlog.co.uk/
Looks pretty good. I don't think its available yet, still under test.
Not that cheap though.

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irvined

posted on 3/7/11 at 09:52 PM Reply With Quote
Matt,

I'm getting around 5hz sample rate, I think I can get higher, but I need to tune some of the delays and timeouts. Its throttled at the moment as it was a little too fast initially. On my todo list is to profile the code and see what it's waiting on, my guess is the SD card as it flushes after every 20 metrics (about once every 2 polls) which will take a while. I think I can up that considerably before badthingshappen(tm)

Just need to spend some time actually driving and get some data

David





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