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+--- Thread: AirMini Travel Data Extraction & Teardown (/Thread-AirMini-Travel-Data-Extraction-Teardown)
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RE: AirMini Travel Data Extraction & Teardown - JohnHedge - 05-15-2019
(02-27-2019, 12:03 AM)JimIve Wrote: The 256KB FRAM contains a FAT12 filesystem, but doesn't contain the sleep data (having some communication errors which need to be knocked down so I haven't seen every "page" on there yet, but it appears to be just settings and a journal file) and some DATALOG files (which don't contain sleep data), and the FRAM would be too small:
Code:drwxrwxrwx 1 unknown staff 1024 1 Jan 2012 DATALOG
drwxrwxrwx 1 unknown staff 1024 1 Jan 2012 ERRORLOG
drwxrwxrwx 1 unknown staff 1024 1 Jan 2012 SETTINGS
-rwxrwxrwx 1 unknown staff 16384 1 Jan 2012 journal.jnl
./DATALOG:
total 296
drwxrwxrwx 1 unknown staff 1024 1 Jan 2012 .
drwxrwxrwx@ 1 unknown staff 16384 26 Feb 21:55 ..
-rwxrwxrwx 1 unknown staff 5120 1 Jan 2012 AEE.EVN
-rwxrwxrwx 1 unknown staff 26880 1 Jan 2012 BAE.EVN
-rwxrwxrwx 1 unknown staff 3840 1 Jan 2012 BEE.EVN
-rwxrwxrwx 1 unknown staff 6400 1 Jan 2012 DAE.EVN
-rwxrwxrwx 1 unknown staff 33280 1 Jan 2012 DAF.EVN
-rwxrwxrwx 1 unknown staff 5120 1 Jan 2012 ELV.EVN
-rwxrwxrwx 1 unknown staff 3840 1 Jan 2012 FAE.EVN
-rwxrwxrwx 1 unknown staff 26880 1 Jan 2012 RAE.EVN
-rwxrwxrwx 1 unknown staff 6400 1 Jan 2012 REE.EVN
-rwxrwxrwx 1 unknown staff 5120 1 Jan 2012 SRE.EVN
-rwxrwxrwx 1 unknown staff 6400 1 Jan 2012 XSE.EVN
./ERRORLOG:
total 34
drwxrwxrwx 1 unknown staff 1024 1 Jan 2012 .
drwxrwxrwx@ 1 unknown staff 16384 26 Feb 21:55 ..
./SETTINGS:
total 60
drwxrwxrwx 1 unknown staff 1024 1 Jan 2012 .
drwxrwxrwx@ 1 unknown staff 16384 26 Feb 21:55 ..
-rwxrwxrwx 1 unknown staff 27 6 Aug 2017 AGL.set
-rwxrwxrwx 1 unknown staff 23 6 Aug 2017 AHL.set
-rwxrwxrwx 1 unknown staff 80 1 Jan 2012 BGL.set
-rwxrwxrwx 1 unknown staff 345 1 Jan 2012 BTP.set
-rwxrwxrwx 1 unknown staff 20 6 Aug 2017 CGL.set
-rwxrwxrwx 1 unknown staff 325 1 Jan 2012 DID.set
-rwxrwxrwx 1 unknown staff 28 6 Aug 2017 EGL.set
-rwxrwxrwx 1 unknown staff 1038 1 Jan 2012 MCF.set
-rwxrwxrwx 1 unknown staff 28 6 Aug 2017 MGL.set
-rwxrwxrwx 1 unknown staff 54 1 Jan 2012 MML.set
-rwxrwxrwx 1 unknown staff 48 6 Aug 2017 PGL.set
The SPI Flash seems to contain the sleep data, but I'm stumped as to the format. Anyone have a clue how they're storing the sleep data? They use "FS NOR" repeatedly at the beginning of every page, but I couldn't find a match on the flash file format. Anyone familiar with SleepyHead have any ideas about this?
I just took a quick look at the SPI NOR data you posted and am trying to make sense of the data. There is a small header and then a bunch of records but no index or table of contents present that I can see. I'm thinking that maybe they're using the FRAM to keep track of this bookkeeping information such as where to write next, etc...
Can you upload the FRAM contents as well? I think the journal might contain some helpful clues.
RE: AirMini Travel Data Extraction & Teardown - JohnHedge - 05-15-2019
What I've been able to suss out so far is that the first 32 bytes of the file appears to be some sort of header which is then followed by N records of 368 bytes (0x170) each which appear to consist entirely of signed 16-bit values. I tried to interpret a bunch of the values as some standard time formats but none of them appear to make sense. This pattern does break down partway through the file, so hopefully other sources of information can shed some light on it.
I think the journal file from the FRAM might be helpful in finding timestamps or other metadata for the records stored in the SPI NOR.
RE: AirMini Travel Data Extraction & Teardown - snorult - 06-14-2019
This is excellent work @JimIve and others
RE: AirMini Travel Data Extraction & Teardown - Gideon - 06-14-2019
ResMed has used EDF Plus for it's File formats on the SD cards. The file doesn't look like that format though.
https://www.edfplus.info/
RE: AirMini Travel Data Extraction & Teardown - lemonbomb - 06-15-2019
wow this is amazing, good luck and wish that ResMed made at least a microsd for mini. This is one of the main reasons why I decided against the mini and so many proprietary items.
RE: AirMini Travel Data Extraction & Teardown - yrnkrn - 06-17-2019
Impressive work!
RE: AirMini Travel Data Extraction & Teardown - sedelstein - 08-28-2021
Hi! Haven't posted in a while. I just bought an AirMini to replace my Respironics FoamStation. I like the little machine, but, like so many others, am incredulous that there is no way to get the data out of it. Looking for a way to do it, I landed here and read the fantastic work described in this thread. One of the two, the work or the thread, seems to have ended abruptly several years ago. Is anyone aware whether this work continued, and whether the code to the file format was ever cracked?? Thanks!
RE: AirMini Travel Data Extraction & Teardown - MasterW - 12-03-2022
@JimIve - thanks for all the work you’ve put into this. I can’t help but notice you seem to be quite good at electronics and coding. I’ve been searching for awhile now to try to find a solution that eliminates the need for proprietary chargers. This isn’t such a big deal if I’m at home since my machine is always plugged in and doesn’t move but for traveling, it would be great if I didn’t need to bring my CPAP power supply.
I haven’t seen this done anywhere but have you ever considered getting rid of the proprietary power connector and replacing it with a USB C female tip so users can leverage the convenience and power delivery of USB C?
RE: AirMini Travel Data Extraction & Teardown - Crimson Nape - 12-03-2022
Hi MasterW! -
The OP's profile shows he hasn't been back on the board since September 2021. Since your question deals with a different subject, you may have better luck creating your own thread for your inquiry.
- Red