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It certainly is possible, but will be very
> hardware dependent (what is the light connected to).This point can't be stressed enough. Basically you need to go find or make a device that the iSeries can talk to. There are a bunch of possible solutions that involve a photosensor, relay and PIC microcontroller, all using a serial port (which iSeries can drive/query via an ASCII controller and ICF file.)
An alternative is to use a PC to control the light and to control the PC via remote command, which you can evoke through RPG via system(), QCAPCMD, QCMDEXC and so on. See RUNRMTCMD for details.
--buck
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