title: Do cartridges have a unique (snmp) value? (Lexmark)
body: <p>I'm currently developing an SNMP application for work. My boss wants me to somehow identify that a completely new cartridge has been installed and that you get a notice when an old one gets placed again in the printer. To do this, I need some kind of unique value that says that either a new or old cartridge has been placed in the printer. Now I can store this unique ID somewhere in a database, that's not a problem, the problem is: how can I tell if a completely new cartridge has been placed? By some kind of serial number?</p>
  
  <p>I need to be able to retrieve this value by SNMP. (Yes, everything works for SNMP, so technically I just need the OID).</p>
  
  <p>AGAIN: THIS IS FOR LEXMARK</p>
  
  <p>The closest I can find to something being unique for a cartridge is an install date...</p>
  
  <p>Any information on this is very helpful.</p>