PJL commands can do some front-panel functions programmatically. The following page suggests some possibilities:
http://www.hp.com/cgi-bin/cposupport/get_doc.pl?SNI=hplaserjet8887&LC=printers&Tfile=bpl02416 Cost per page
|file: /Techref/printer/hps.htm, 1KB, , updated: 2005/5/18 17:12, local time: 2022/5/23 16:38,
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<A HREF="http://www.massmind.org/Techref/printer/hps.htm"> Hewlett Packard Printers</A>
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