HP Point of Sale (POS) Peripherals Configuration Guide
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3. Select the correct device name for the cash drawer to be tested. The
OPOS name for the HP USB cash drawer is: HPUSBCashDrawer-1.
4. Click the Open button.
5. Click the Enable button.
6. Click the Open Drawer button and the cash drawer should open. The GUI
should also show status that the cash drawer is open.