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#1 2018-08-19 19:56:24

slawallo
Contributor
Registered: 2018-08-19
Posts: 3

I need help with keyfob

20180819_191506.jpg

I want clone of this keyfob

hw tune

Measuring antenna characteristics, please wait......#db# DownloadFPGA(len: 42096)
.
# LF antenna: 37.26 V @   125.00 kHz
# LF antenna: 31.21 V @   134.00 kHz
# LF optimal: 37.81 V @   126.32 kHz
# HF antenna: 29.60 V @    13.56 MHz
Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.
lf search u
NOTE: some demods output possible binary
  if it finds something that looks like a tag
False Positives ARE possible


Checking for known tags:


No Known Tags Found!


Checking for Unknown tags:

Possible Auto Correlation of 1 repeating samples

Using Clock:64, Invert:0, Bits Found:625
ASK/Manchester - Clock: 64 - Decoded bitstream:
1111111110100101
1111111111111100
0110000010101010
0111110001110000
0000000000000000
0110000001011111
1010010111111111
1111111111111111
1111111110100101
1111111111111100
0110000010101010
0111110001110000
0000000000000000
0110000001011111
1010010111111111
1111111111111111
1111111110100101
1111111111111100
0110000010101010
0111110001110000
0000000000000000
0110000001011111
1010010111111111
1111111111111111
1111111110100101
1111111111111100
0110000010101010
0111110001110000
0000000000000000
0110011111111111
1111111111111111
1111111111111111


Unknown ASK Modulated and Manchester encoded Tag Found!

if it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'

Last edited by slawallo (2018-08-19 20:53:10)

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#2 2018-08-19 20:28:21

iceman
Administrator
Registered: 2013-04-25
Posts: 6,646
Website

Re: I need help with keyfob

Any markings / numbers  on your keyfob?

Save a trace and share the file will help analysing it.

lf read
data save mykeyfob.pm3

If you feel the love,  https://www.patreon.com/iceman1001

modhex(hkhehghthbhudcfcdchkigiehgduiehg)

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#3 2018-08-19 20:42:47

slawallo
Contributor
Registered: 2018-08-19
Posts: 3

Re: I need help with keyfob

I see number 0058539

lf read
#db# LF Sampling config:
#db#   [q] divisor:           95
#db#   [b] bps:               8
#db#   [d] decimation:        1
#db#   [a] averaging:         1
#db#   [t] trigger threshold: 0
#db# Done, saved 40000 out of 40000 seen samples at 8 bits/sample
#db# buffer samples: 6d 6e 6f 70 70 71 71 72 ...
Reading 39999 bytes from device memory

mykeyfob.pm3

https://ufile.io/vmqtw

Last edited by slawallo (2018-08-19 20:53:58)

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#4 2018-09-19 04:06:56

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,301

Re: I need help with keyfob

your tag is not of a format we've seen.
the raw data collected by the lf search u appears correct however.
(4 blocks of ask/manchester encoded data at rf/64 bit rate)
this should be sufficient to clone the tag.

more information is needed to properly identify the format the data on the tag is stored in (or what the bits mean).

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