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missing flow rate chart data
#11
JediMark's info on F&P gives it a grade of D.

With the following remarks:
Negatives

Manufacturer failed to openly document this format.
Fails to keep flow data, even with a potentially huge datastick.
Very low resolution (2 minutes) event data, can't overlay over flow waveform.
Hideously stupid timestamp format.

http://sleepyhead.sourceforge.net/wiki/i...ata_Format

With emphasis on flow waveform data structure:
http://sleepyhead.sourceforge.net/wiki/i..._Structure

Perhaps F&P has some sort of Y2K15 bug?

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#12
Okay, can we find out what program or tool to use, in order to read the 3800KB FLW000x.FPH flow files?

Per below, there ought to be some way to look at the the FLW000x.FPH files, and to compare the 32bit timestamp words written now to the 32bit timestamp words written prior to Dec 30.

I happen to have complete data stick archives from November and December. If the FLW000x.FPH files on the stick today do not possess 2015 timestamps, then the machine is no longer writing the files. If they do possess current timestamps, then we know the machine is still writing flow rate data, but that Sleepyhead can no longer import them.




"This FLW000?.FPH files are constant 3.7Mb in size, and will start a new one when it's full, cycling between 7 files.

Begins with normal 0x200 byte header Followed by a 32bit timestamp, and multiple chunks of sample data for a single session.

Each chunk consists of a repeating pattern of

50 16bit samples,
followed by the 16bit pressure value,
8 bit leak/adjustment value
and a 16bit (0xffff) end-of-record marker
Each chunk ends after the last 0xffff marker with the 16bit end-of-chunk code 0xff7f, and zero padding to the end of a 512byte page, followed by the next block if any (or zeroes till the end of file)

Unsure of any timing issues in between chunks.. (possibly chunks restart aligned to a 2 or 6 minute boundary)"
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#13
I suspect that SH simply doesn't understand the data in 2015 due to the undocumented format. You might try changing the date on the machine to 2014 and see if the flow data comes back. (Assuming you can change the date on the Icon).
Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
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#14
I looked for a way to change the date... there isn't one. You can only change the time. Nowhere in the User's manual is there any mention of setting the date.
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#15
You need a HEX file reader. I'm sure there are some freeware ones out there.
I sent a PM to jedimark -- no response as to this date.
INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#16
Wow all - This reminds me of when I used to write code. I did not like it then and I don't like it now. F&P needs to make the change and it should be easy to do. Thanks for all the efforts guys - lot of work went into your effort.

Buffalo bob
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#17
So, I compared the FLW files off of my USB stick from last night, against the night before. Even without a HEX reader, I can see that the ICON is still writing flow rate data. I detected changes within the FLW002 and FLW003 files, so I now know that the ICON is still going through its system of archiving to the FLW0001 through FLW0007 files, cycling through them as each 3800KB bucket gets filled up with fresh data.

The problem is evidently with Sleepyhead's ability to pull the data. Hopefully we can get this info to the Sleepyhead developers?
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