I´d like to close this post with the information that I got from lab401. At first I was advised to detach the antenna and remount it again. This made no difference at all. The error message that the antenna is not working kept coming. Lab401 informed that they´ll exchange my device shortly.
]]>https://www.shopnfc.com/fr/lecteurs-encodeurs-nfc/300-390-lecteur-nfc-xl-longue-portee.html#/122-modele-libnfc
Someone heard something about it? Tested It?
Any good results?
I Will have it in the days but if you have some advices?
Thanks all!
]]>I've recently bought an 'original'(?) Proxmark3 Easy with 512k chip.
But sadly it seems be only partially working; reading and writing to cards works fine, but simulation does not work. (Also sniffing somehow only shows messages from the tag and never from the reader.)
I've tried many simulation modes (14a, mf, etc), but none of them work. Both my ACR122 and Oneplus device do not respond to the Proxmark at all..
Here is my hardware and software information:
[ ARM ]
bootrom: iceman/master/ice_v3.1.0-1060-gbac9fe04 2018-10-21 07:00:25
os: iceman/master/ice_v3.1.0-1060-gbac9fe04 2018-10-21 07:00:30
[ FPGA ]
LF image built for 2s30vq100 on 2017/10/25 at 19:50:50
HF image built for 2s30vq100 on 2018/ 9/ 3 at 21:40:23
[ Hardware ]
--= uC: AT91SAM7S512 Rev B
--= Embedded Processor: ARM7TDMI
--= Nonvolatile Program Memory Size: 512K bytes, Used: 235800 bytes (45%) Free: 288488 bytes (55%)
--= Second Nonvolatile Program Memory Size: None
--= Internal SRAM Size: 64K bytes
--= Architecture Identifier: AT91SAM7Sxx Series
--= Nonvolatile Program Memory Type: Embedded Flash Memory
Ofcourse I also tried with the vanilla software, that made no difference. My host OS is Arch Linux.
The antenna performance seems great and not an issue. I can read cards and detect reader fields over 4cm away and resonance voltages also seem fine:
pm3 --> hw tune
[=] measuring antenna characteristics, please wait...
....
[+] LF antenna: 35,26 V - 125.00 kHz
[+] LF antenna: 27,33 V - 134.00 kHz
[+] LF optimal: 35,41 V - 123,71 kHz
[+] LF antenna is OK
[+] HF antenna: 27,20 V - 13.56 MHz
[+] HF antenna is OK
[+] Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.
What could be causing this issue? It seems like my device can read the coil open and drive it, but cannot load the coil like a tag would.
I know there are 8 drivers per coil, could one of them be broken to cause these symptoms? How could I check this?
Many thanks in advance for your help
]]>If you've done all the standard software troubleshooting then it definitely looks like it's defective in some way - the HF antenna cannot be disconnected on this design without physically cutting PCB traces. The problem may not be anything major but unless you want to sink time into repairing the board yourself, the best option would be to return it and get a new one.
If replacing it isn't an option and you've got a multimeter it might be worth trying to trace continuity from the antenna back through to pin 4 on the microcontroller (AD5) - this is the AMPL_HI signal that hw tune is trying to measure. There could just be a bad resistor along that path. I investigated the board layout of my PM3 easy clone and the connections seem to pretty closely follow the original schematic, so the schematic may be helpful to you too: https://github.com/Proxmark/proxmark3/b … schema.pdf There are a couple of non-essential chips that haven't been included on the board though (AD8052 and TLV3052)
]]>Here is more information concerning my case ...
I would like to work on a MIZIP type tag but the antenna that came with my proxmark 3 (hirose connector and loop) does not support this type of tag. It does not succeed in establishing communication.
May I ask Mizip users if they can specify what kind of antenna they are using please?
I tried to build several models of antennas loops but none issued more than 4.09 volts ....
Thank you very much for your help
Have a great day
Ps : Here is a picture of my "experimental" setting ...
May I also ask owners of the proxmark 3 V2 (Elechouse) if they can communicate on the size of the pcb and the diameter of the copper wire used the HF Antenna please ?.
Thank you very much
I found this antenna but i am unsure about if it works or not..
Q1.
is it safe to connect this antenna to the PM HF or will it burn the hardware?
Q2.
Will this antenna help on the range or does the PM not have enough power to drive this?
Q3.
if the PM is having to little power to drive this antenna, is there an way to fix that.. like an amplifier or change some parts on the PM to better ones ?
As you can see i dont know much about antenna but hope you guys can help me.
specs on the antenna:
-----------------------------------------------------------------------------
dimensions: W337xH237xD8,3mm
Antenne Connection: RG58 koax-cabel, SMA-connector
Read range up to 30 cm
Operating frequency 13.56 MHz
Max. transmitting power 1.2 W
Antenna connector RG58 coaxial cable with SMA plug (50 Ω); ca. 200 mm long
-----------------------------------------------------------------------------
Thanks
Thomas
http://www.proxmark.org/forum/img/6813/1453457974_z_antenna.jpg
Can you repost the pic please?
]]>Normaly i upgraded my PM3
But when i check my HF Antenna
hw tune : HF antenna unusable
( LF antenna is ok )
Can i check my antenna with Ohms ? if yes how ?
Thanks
Regards,
Mert Cilek
http://blog.7pcb.com
Here are a few to get you started...
Others on this forum may have more suggestions.
HTH
]]>Jonor you are right, that small antenna works GREAT with small tags! Thank you man !!!
thanks.
I created my antenna with 6 laps and Cable 1.2mm . The voltage is too low ... but I read more or less well (25 % of the time correct reading ) .
As I can improve it ?
proxmark3> # LF antenna: 0.00 V @ 125.00 kHz
proxmark3> # LF antenna: 0.00 V @ 134.00 kHz
proxmark3> # LF optimal: 0.00 V @ 12000.00 kHz
proxmark3> # HF antenna: 3.00 V @ 13.56 MHz
proxmark3> # Your LF antenna is unusable.
proxmark3> # Your HF antenna is marginal.
]]>