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Hello, I was wondering if anyone would be able to recognize what type of data this is? I have a physical device (SkyTrak) which analyzes a golf ball (launch angle, spin, speed etc.) and passes the data to an app on the iPad. I can see the data being passed from port 5024 on the device to a port on the iPad (in this case 57471). When I do a port scan using Mac Network Utilities it seems to show a SCTP Telnet port but I am unable to Telnet to the port directly.

I am hoping to capture the data into a human readable format and save it to a local excel file but I am obviously unable to decode the dataset.

Please note that I have transposed some of the serial number details.

Thanks in advance

While I am not sure if it is helpful or not, the wifi device being used in the unit is a Inventek es-Wifi (Maybe ISM43362-M3G-L44).

Data set 1: (initial device connection to the ipad)

.......................A...@P..B...C................x...........................SKYTRAK_CXXXXXXXXXXX.........................................................{.. [email protected]'..B...C................Y...........................SKYTRAK_CXXXXXXXXXXX........................................................<... [email protected]................SKYTRAK_CXXXXXXXXXXX..........................................................5. ........ [email protected].......SKYTRAK_CXXXXXXXXXXX.........................................................a.g [email protected] ...................................SKYTRAK_CXXXXXXXXXXX...........................................................| [email protected]!.......R...........................SKYTRAK_CXXXXXXXXXXX........................................................PGFu [email protected]".......5...........................SKYTRAK_CXXXXXXXXXXX......................................................... d. [email protected]]..B4q.C........#...................................SKYTRAK_CXXXXXXXXXXX........................................................R.. .......................A...@H..B.S.C........$.......e...........................SKYTRAK_CXXXXXXXXXXX.........................................................d.5 [email protected] ..B.S.C........%...................................SKYTRAK_CXXXXXXXXXXX...........................................................q [email protected]&.......n...........................SKYTRAK_CXXXXXXXXXXX........................................................|.~. [email protected]'.......^...........................SKYTRAK_CXXXXXXXXXXX............................................................ [email protected](.......^...........................SKYTRAK_CXXXXXXXXXXX..........................................................4. [email protected]).......o...........................SKYTRAK_CXXXXXXXXXXX..........................................................z. [email protected]}..B...C...............g...........................SKYTRAK_CXXXXXXXXXXX........................................................dk< .......................A...@T..B...C........+.......J...........................SKYTRAK_CXXXXXXXXXXX.........................................................%.i .......................A...@A..Bj..C........,...................................SKYTRAK_CXXXXXXXXXXX..........................................................QC [email protected]'..C........-...................................SKYTRAK_CXXXXXXXXXXX.........................................................%.o [email protected]................SKYTRAK_CXXXXXXXXXXX..........................................................O. [email protected]/.......(...........................SKYTRAK_CXXXXXXXXXXX........................................................Q.Vb [email protected]................SKYTRAK_CXXXXXXXXXXX........................................................./.r ........'[email protected].......SKYTRAK_CXXXXXXXXXXX........................................................z..{ ........%..............A...@u..B...C........2...................................SKYTRAK_CXXXXXXXXXXX............................................................ .......................A...@L~.B^..C........3...................................SKYTRAK_CXXXXXXXXXXX......................................................../... ............o...&......A...@8{.B.%.C........4...................................SKYTRAK_CXXXXXXXXXXX........................................................:_.. ....(........D.+.(z.1C.....V.....-..}......(...z..g.Y..n....91R...<~.1..k....9...;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y

Dataset 2: (I believe this is the data which is shown when I actually take a swing with the device)

! ......kF].4.dR...O....{68..r+.C8-.s.20uA.T.}[email protected]'k.U.9.>G.y.,.......;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y....q7;..&.\7t..T}Gr,...Va9........v..K.c.. ..[UC.%PCMC.!...Q.............K...A..9'.....=02......;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y...............px....g..P.Al|....?..L.;........URU..V.g....9.N.Ve.d.vf...JHw<...#.!c.....j........;7..[.oO.b...y..;7..[.oO.b...y ..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y/S8..$...{GC .........JAF....e..KA..:L'.[.?3C.i |l)..)N.4..\."...3..L...I>.+.z2ZX. ..........W.O..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;U.6.-..].G.t.b...P..?.j.RV...H.j..4S.....K....?^...n1.H.'....O.0...[.N.T...Z.*D.f,......q a....;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y)..r.*....'&.......P.........y.U........ .X.K.n.8..k..f..w..q...b.....~L.}.2HS.....q..:...[Z.C....;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y.E...6no.C\Mj.g....9^2.,............{88&....:.-....N.e...<D.S.........q.......G..Hy.........h>iz..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...yBG..L...S....$........;C_ ..].L..k...oQC...".Yl. Os..+....)L~.raj&h.=r..e..4....w..kF...../...E.z..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y ..;7..[.oO.b...y..;7..[.oO.b...yk8.>......B%..oX/..c.}d...l...(./..(k$."...... ..51...mH....w.|.<n.1.....g.c..,.x...ut5.z........;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;h.d....xb. \\~.z.m..7#.....2.p....b.k%.="" ....fvhu.s....]p+c..s.......{"..i.iv......!.l.y<........;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y.....w.il....\..8*+.....gn.....6..n...h+c...l.........!......q...^.!.="" j_..g.z58.a.="" n....pd]@.t....;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y..;7..[.oo.b...y.,...f..c.....\...^.p.u....d.2.j.t.:.w5.q..e.%.!|..="" b.z...v....lc...b.._..;l..5.a..:b.r<code="">k.....M...;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y ..;7..[.oO.b...y..;7..[.oO.b...y...\0.k. .......)4.... ..nb.>[email protected]<...'0.d....H."0=..O~K.f>.........oh...8C9;......\....e....R5...;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y ..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y.v....;;...;.(.....yo..::....g"........n.........6_v.../...y.l,...N&.n...s&.Y.}....MP..i.V.....(..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y....U.}.9.o.M.!.....M....zZ....."[email protected]~.....k...z........w.^.X.b....X.H/.;i..G-... W4..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...yi"..O........V'..|. .iy......9.p.#......Bw......\\& ..!....6..M..A.[.....8..c...2S+kz.a.A...I......;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y>....Y.4..u.<[email protected] .w...o7O....~E.L..,...=....s#......YJ......4K.....Z...;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y ..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...y..;7..[.oO.b...yI..S......zh`...F.._m.[z...*/,.:.^.>.kVPv.3..l..Iq.=....w..SQ......C.5....5 .$..

asked 25 Feb '15, 13:29

shifter's gravatar image

shifter
6113
accept rate: 0%

edited 25 Feb '15, 13:33

1

I doubt you'll have any luck anyone reverse engineering this for you, especially when you do not provide a capture file instead of that unreadable ASCII dump.

By the way, all those "." are non-printable numbers, but they're probably all different, so you lost a lot of information by exporting your data like that ;-)

(25 Feb '15, 15:37) Jasper ♦♦

Thanks for the comment Jasper - As suggested, below is a link to the capture file.

Re: ASCII dump - thanks for the heads up - since it was the only piece of human readable text (with the serial number of the device showing) I assumed it was the most decoded content.

https://www.dropbox.com/s/pryn5k2exd2alzv/Skytrak1.pcapng.gz?dl=0

(25 Feb '15, 17:27) shifter

well, by looking at the text export of the data, I can literally see a bad slice. The reason could be a grip that's too soft. Furthermore the launch angle is a bit low with 17 degree. I guess you are hitting the ball to early. A better stand and a better alignment to the ball could help to optimize the launch angle.

Seriously, there is no easy way to decipher the communication as that's a proprietary binary protocol. With a lot of reverse engineering (especially by looking at the iOS app internals), one could probably figure out how their protocol works, but that's gonna cost a lot of time and/or money. I guess it's much easier to contact the vendor and simply ask for that information and/or ask them to add data export features into their tool.

Regards
Kurt

permanent link

answered 26 Feb '15, 01:45

Kurt%20Knochner's gravatar image

Kurt Knochner ♦
24.8k1039237
accept rate: 15%

edited 27 Feb '15, 15:24

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question asked: 25 Feb '15, 13:29

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last updated: 27 Feb '15, 15:24

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