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#1 2019-10-31 22:44:29

Cedar
Contributor
Registered: 2019-10-29
Posts: 4

PM3 clicking

I've had a proxmark3 for about a year now, using it occasionally without issue.  Recently I was trying to sniff mifare interaction with a ACR122u reader and the pm3 seemed to shutdown during the process and become nonresponsive.  Both the pm3 and the ACR122u were plugged into the front-panel ports on my machine, so I suspect the failure may have been due to insufficient power.

After that, however, the pm3 makes an audible click when I plug it in to the usb, the led's flash, then the red light near the button flashes.  The client is able to access it, but only once before I have to unplug the USB and reconnect it.  Trying to bring the client up a second time yields 'invalid serial port', though dmesg does not indicate the device has detached or otherwise changed (and does detect it disconnecting).

So, it still works, but with degraded performance and new behavior.  Is there anything to do about this?

I'm using latest client and firmware from github, pulled & built earlier this week.

Thanks,
Cedar

me@computer:~/proxmark/proxmark3-master/client$ ./proxmark3 /dev/ttyACM0
Prox/RFID mark3 RFID instrument
bootrom: /-suspect 2019-10-29 17:58:00
os: /-suspect 2019-10-29 17:58:01
fpga_lf.bit built for 2s30vq100 on 2015/03/06 at 07:38:04
fpga_hf.bit built for 2s30vq100 on 2019/10/06 at 16:19:20
SmartCard Slot: not available

uC: AT91SAM7S512 Rev B
Embedded Processor: ARM7TDMI
Nonvolatile Program Memory Size: 512K bytes. Used: 209303 bytes (40%). Free: 314985 bytes (60%).
Second Nonvolatile Program Memory Size: None
Internal SRAM Size: 64K bytes
Architecture Identifier: AT91SAM7Sxx Series
Nonvolatile Program Memory Type: Embedded Flash Memory
proxmark3> hw status
#db# Memory
#db#   BIGBUF_SIZE.............40000
#db#   Available memory........40000
#db# Tracing
#db#   tracing ................1
#db#   traceLen ...............0
#db# Currently loaded FPGA image:
#db#   fpga_hf.bit built for 2s30vq100 on 2019/10/06 at 16:19:20
#db# Smart card module (ISO 7816)
#db#   version.................FAILED         
#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#   s] samples to skip:   0
#db# USB Speed:
#db#   Sending USB packets to client...
#db#   Time elapsed:      1500ms
#db#   Bytes transferred: 766976
#db#   USB Transfer Speed PM3 -> Client = 511317 Bytes/s
#db# Various
#db#   MF_DBGLEVEL........2
#db#   ToSendMax..........-1745331512
#db#   ToSendBit..........0
proxmark3> exit
me@computer:~/proxmark/proxmark3-master/client$ ./proxmark3 /dev/ttyACM0
ERROR: invalid serial port
proxmark3>

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