iButton anyone?

[Bob Elzer]

To be clear, where is the readout coming from ?
 
If each machine is running software, that reads the iButton, and stops at
30,000 logins. Then my questions would be
 
Is it the software that is stopping the logins at 30,000, in which case, can
we bypass the software ? Or fix it.
 
Is it the iButton, that has a counter and won't go higher ?
 
It seems to be the software, in which case, booting from another system, and
changing the system disk to bypass that software would probably work.
 

  _____  

From: plug-discuss-bounces at lists.plug.phoenix.az.us
[mailto:plug-discuss-bounces at lists.plug.phoenix.az.us] On Behalf Of Tim
Noeding
Sent: Friday, April 17, 2009 10:58 AM
To: Main PLUG discussion list
Subject: Re: iButton anyone?


Thanks for the response Daniel, but sadly it is exactly 30k. The machine has
a readout on the display which gives a warning at 25k and stops functioning
at 30k. I'll post again when the 1-Wire usb and the scanner come in.

Thanks again for the responses!

Tim


On Tue, Apr 14, 2009 at 10:05 PM, Daniel Stasinski <mooooooo at avenues.org>
wrote:


> for logging usage. After 30k uses, it prevents the machine
> from working anymore. My boss tasked me with finding
> out how to get around


I could be flat wrong but 30k is close to 32k, which is one of those
magical numbers.  It could be incrementing a counter that is evaluated
as a 16 bit signed integer (which overflows at 32767 + 1).   Depending
on the rest of the code, it could be as simple as changing it to a
long integer.

Daniel

| ---------------------------------------------------------------
| Daniel P. Stasinski          | http://www.saidsimple.com
| mooooooo at avenues.org         | http://www.disabilities-r-us.com
| XMMP: mooooooo at avenues.org   | http://www.avenues.org
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