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#1 2014-05-08 09:01:26

hheile
Contributor
Registered: 2014-03-03
Posts: 35

Sending bytes to proxmark failed after hw version

Hello,

i have a strange issue here:
when i use hw version, i recieve:

proxmark3> hw tune
#db# Measuring antenna characteristics, please wait...                 
#db# Measuring complete, sending report back to host                 
         
# LF antenna: 14,50 V @   125.00 kHz         
# LF antenna: 21,08 V @   134.00 kHz         
# LF optimal: 26,45 V @   130,43 kHz         
# HF antenna:  1,00 V @    13.56 MHz         
# Your HF antenna is unusable.         
proxmark3> hw version
#db# Prox/RFID mark3 RFID instrument                 
#db# bootrom: svn 848                 
#db# os: master/v1.0.0-2-g7eb0f3d-suspect 2014-04-03 13:05:19                 
#db# FPGA image built on 2014/03/24 at 21:54:44                 
uC: AT91SAM7S256 Rev B         
Embedded Processor: ARM7TDMI         
Nonvolatile Program Memory Size: 256K bytes         
Second Nonvolatile Program Memory Size: None         
Internal SRAM Size: 64K bytes         
Architecture Identifier: AT91SAM7Sxx Series         
Nonvolatile Program Memory Type: Embedded Flash Memory   

when i type hw tune again i recieve:
       
proxmark3> hw tune
Sending bytes to proxmark failed         
proxmark3>

i am able to reproduce this over and over again.
typing hw version makes my proxmark unusable until reset
the device is connected then /dev/ttyACM1
and then /dev/ttyACM2
and so on

?! any ideas how to solve this issue? Device was bought directly from proxmark3.com

thanks for reading and answering this post

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#2 2014-05-09 07:46:18

holiman
Contributor
Registered: 2013-05-03
Posts: 566

Re: Sending bytes to proxmark failed after hw version

The hw version command does 'kill' the device, in one known version just after we switched to git. See https://github.com/Proxmark/proxmark3/issues/10 for more info

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