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From: Mark Langford via KRnet <krnet at list.krnet.org>
To: KRnet <krnet at list.krnet.org>; CorvAircraft <corvaircraft at
list.corvaircraft.org>
Cc: Mark Langford <ml at n56ml.com>
Sent: Tuesday, October 13, 2015 7:50 PM
Subject: KR> inexpensive serial data logger, iEFIS
KRnetHeads,
I've been waiting something like 18 months on MGL to port their serial
data to the microSD card that's plugged into the face of the iEFIS, and
after several conversations and assurances, I've finally given up. The
iEFIS does have a serial output stream available on a DB-9 connector on
the back of the unit, but I was trying to avoid carrying a laptop around
to collect that stuff.? Been there, done that, didn't like it. I bought
the iEFIS specifically to get a simple SD card interface that logs
flight data...and it turns out data isn't even logged to it!? Instead,
an extremely hoaky JPG with a bunch of squiggly lines with corresponding
multiple scales is what you get, and trust me...it's useless!? There is
no data stream of actual numbers that can be gleaned for engine health
monitoring purposes.
So I started looking around on ebay for a serial data logger, and there
are plenty of options these days.? The one I settled on is shown at
http://www.ebay.com/itm/271999383948 , and it looks perfect for what I
need...just wire it to the master and iEFIS serial data output, plug in
a microSD card, and data is automatically recorded to a time-stamped
data file whenever power is applied. It weighs 4 grams (.14 ounce) and
is the smaller than two postage stamps, is 3/16" thick, and cost me $52
delivered.? Needless to say, this is far preferable to lugging a laptop
around.
I'll report back after flying with it, but thought others might be
looking for something similar.? This should also work fine with a GRT
EIS.? I may eventually reinstall the EIS, as I consider it far better
than the very expensive iEFIS, as an engine monitoring and parameter
trend analysis device.
If you wonder what I mean by "hoaky JPG" from the iEFIS, take a look at
http://www.n56ml.com/iefis/150513_no_alt_no_rpm.jpg and I think you'll
agree that it's not only useless, but a complete waste of time to even
download and generate.? Contrast that with the GRT EIS output, shown at
http://www.n56ml.com/iefis/EIS_logging_example.jpg. This is stable,
detailed, readable data you can sink your teeth into! Notice how stable
these numbers are...quite a contrast to the iEFIS output.? More on this
later...
--
Mark Langford
ML at N56ML.com
http://www.n56ml.com
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