Research, development and trades concerning the powerful Proxmark3 device.
Remember; sharing is caring. Bring something back to the community.
"Learn the tools of the trade the hard way." +Fravia
You are not logged in.
Time changes and with it the technology
Proxmark3 @ discord
Users of this forum, please be aware that information stored on this site is not private.
Pages: 1
I could really use a reliable Receive Signal Strength Indicator(RSSI) measurement for ISO14443-A, as an indication of inlay quality.
I see "rssi" as a column in many posts on this forum, but the value is almost always blank or zero. Like here:
http://www.proxmark.org/forum/viewtopic.php?id=1797
proxmark3> hf 14a list
recorded activity:
ETU :rssi: who bytes
---------+----+----+-----------
+ 0: : 26
+ 63: 0: TAG 02 00
Plus, my Proxmark does not display the rssi column header:
Start | End | Src | Data (! denotes parity error) | CRC | Annotation |
------------|------------|-----|-----------------------------------------------------------------|-----|--------------------|
0 | 1056 | Rdr | 26 | | REQA
2244 | 4612 | Tag | 44 00 | |
8512 | 10976 | Rdr | 93 20 | | ANTICOLL
12164 | 17988 | Tag | 88 04 3d f9 48 | |
22320 | 32848 | Rdr | 93 70 88 04 3d f9 48 88 67 | ok | SELECT_UID
My Proxmark is from Elechouse. I have not found a Version command in the CLI, so I can't say what the firmware is.
Is there firmware that will give me an RSSI number? Is the number real?
Offline
Aha here is the PC program startup text with board info:
#db# Prox/RFID mark3 RFID instrument
#db# bootrom: /-suspect 2016-11-09 00:59:56
#db# os: /-suspect 2016-12-08 12:45:38
#db# HF FPGA image built on 2015/03/09 at 08:41:42
#db# Modify by Willok(willok@163.com)#db# proxmark3.taobao.com
Prox/RFID mark3 RFID instrument
uC: AT91SAM7S256 Rev B
Embedded Processor: ARM7TDMI
Nonvolatile Program Memory Size: 256K bytes. Used: 0 bytes ( 0%). Free: 262144 bytes (100%).
Second Nonvolatile Program Memory Size: None
Internal SRAM Size: 64K bytes
Architecture Identifier: AT91SAM7Sxx Series
Nonvolatile Program Memory Type: Embedded Flash Memory
Offline
The RSSI column was for 14b only. But even in this mode it didn't work correctly. The column has therefore been eliminated.
Offline
Thank you.
Offline
Would you need it in the hf list command? Or would a dedicated hf rssi command work for you as well?
Offline
Do you want to measure the signal from a card or a reader?
Offline
I'm looking for a measurement of the strength of the reply from the inlay. If an inlay has had one trace of its loop cut, or has poor chip bonding, it can still reply but the reply will be weak. I'm trying to find a way to detect that. I have not found an HF reader that presents RSSI, and am hoping that the proxmark can be made to do it.
Offline
Pages: 1