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#1 2015-12-05 19:17:07
- Lenox
- Contributor
- Registered: 2015-01-29
- Posts: 42
PM3 reading G-Prox II showing Indala
Hi there,
I am testing an old G-Prox II fob with latest version 2.5.0, but the PM3 always shows Indala UID=0000000000000000000000000.
Sometimes(10% of the chance) shows G-Prox II which is right.
Is this a software bug or just my PM3 problem?
Thanks in advance,
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#2 2015-12-05 20:14:08
- iceman
- Administrator
- Registered: 2013-04-25
- Posts: 9,538
- Website
Re: PM3 reading G-Prox II showing Indala
Can you save the read and share it?
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#3 2015-12-06 04:11:56
- Lenox
- Contributor
- Registered: 2015-01-29
- Posts: 42
Re: PM3 reading G-Prox II showing Indala
Can you save the read and share it?
proxmark3> lf search
Reading 30000 bytes from device memory
Data fetched
Samples @ 8 bits/smpl, decimation 1:1
NOTE: some demods output possible binary
if it finds something that looks like a tag
False Positives ARE possible
Checking for known tags:
BitLen: 319
Indala UID=0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 (0000000000000000000000000000000000000000000000000)
Valid Indala ID Found!
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#4 2015-12-06 06:08:46
- Lenox
- Contributor
- Registered: 2015-01-29
- Posts: 42
Re: PM3 reading G-Prox II showing Indala
Should Be:
proxmark3> lf search
Reading 30000 bytes from device memory
Data fetched
Samples @ 8 bits/smpl, decimation 1:1
NOTE: some demods output possible binary
if it finds something that looks like a tag
False Positives ARE possible
Checking for known tags:
G-Prox-II Found: FmtLen XX, FC XX, Card X553
Raw: f900533004038230XXXXXXXX
Valid G Prox II ID Found!
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#5 2015-12-06 12:10:42
- iceman
- Administrator
- Registered: 2013-04-25
- Posts: 9,538
- Website
Re: PM3 reading G-Prox II showing Indala
sorry, I was unclear in my post. Can you save the trace and share it. I didn't mean the output from the commands.
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#6 2015-12-07 03:39:15
- Lenox
- Contributor
- Registered: 2015-01-29
- Posts: 42
Re: PM3 reading G-Prox II showing Indala
http://www.filedropper.com/investigated
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#7 2015-12-07 22:18:12
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: PM3 reading G-Prox II showing Indala
that is some terrible signal. what size is the tag? and what voltage is your antenna without a tag on it?
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#8 2015-12-07 22:20:34
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: PM3 reading G-Prox II showing Indala
it can be cleaned up if you ran a `data dirthreshold 10 -30` (for this specific read only) before the `lf search`
btw, indalademod has some pending adjustments that will clean up false positives like this. (but your read signal is sooo bad it cannot be demodulated without some cleaning.)
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#9 2015-12-08 06:39:51
- Lenox
- Contributor
- Registered: 2015-01-29
- Posts: 42
Re: PM3 reading G-Prox II showing Indala
that is some terrible signal. what size is the tag? and what voltage is your antenna without a tag on it?
proxmark3> hw tune
Measuring antenna characteristics, please wait......#db# DownloadFPGA(len: 42096)
.
# LF antenna: 11.69 V @ 125.00 kHz
# LF antenna: 17.74 V @ 134.00 kHz
# LF optimal: 17.74 V @ 133.33 kHz
# HF antenna: 0.28 V @ 13.56 MHz
# Your HF antenna is unusable.
Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.
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#10 2015-12-08 07:26:25
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: PM3 reading G-Prox II showing Indala
well an 11.69 V antenna with what i assume to be a tiny tag (keyfob or sticker) would probably account for the poor read.
a good lf antenna is between 20-40 V.
but i've used one as low as 10 V with no problems on larger tags, but it caused problems on small tags.
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#11 2015-12-09 18:04:34
- Lenox
- Contributor
- Registered: 2015-01-29
- Posts: 42
Re: PM3 reading G-Prox II showing Indala
well an 11.69 V antenna with what i assume to be a tiny tag (keyfob or sticker) would probably account for the poor read.
a good lf antenna is between 20-40 V.
but i've used one as low as 10 V with no problems on larger tags, but it caused problems on small tags.
I see. Thanks for the info.
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