Frist a bit of background. We have been using Sun Ray's in our Point of Sale application for a number of years and have learned through trail and error what works and what doesn't. Recently, we installed our system at a new customer, replacing PC's used as Point of Sale Cash Registers with our Sun Ray based solution. For sales receipt printers we have been using Star TSP-600 series printers connected to Sun Ray 2's (USB interface). However this customer had several perfectly good Epson TM-88 series printers (parallel interface) that we didn't necessarily want to scrap. So we purchased a couple different USB to parallel adapters to see if we could support their existing Epson printers. These were a Radio Shack Gigaware model ($36 yikes) and one from Sabrent ($10 nice). Both adapters were recognized and nodes were created in the /tmp/SUNWut/units/.../dev directory. Voila! We could print the Epson printers using either adapter. Unfortuately, we discovered later that there were data communications issues, resulting data loss, with the Sabrent adapters and ultimatley replaced them all with the Radio Shack model. The Radio Shack adapter solution has been working well for a few weeks now.
Today's situation. We came upon an opportunity to support existing RS-232 connected customer display poles. Unfortunatley we are already using the Sun Ray RS-232 port as a control interface to a credit/debit card terminal. But, given our success with the USB to parallel adapter solution we decided to try a USB to serial adapter. Thiinking that this would be a pretty generic situation, we went to Fry's grabbed an adapter off the rack. Back at the lab, we connected the adapter and ... nothing, no node in the dev directory. Now, in retrospect, I know I should have checked the HCL. Which I have done and subsequently ordered a Keyspan USA-19HS to try. The actual questions. When a USB device is plugged in to a Sun Ray and not recognized is there anything we can do to talk to it? In the big scheme of things, are there docs on how Sun Ray does USB peripheral recognition and creates nodes or how to write routines to talk to unsupported devices? -- Bruce Silveria SUM/IT Systems p: 888-549-5848 x116 f: 888-598-5479
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