Buy hardware carefully
A POS decision is not complete until the printer, scanner, drawer and daily backup work. Use this page before buying hardware, and ask us when a model is uncertain.
| Hardware | What usually works | What to verify |
|---|---|---|
| Thermal receipt printer | USB, LAN or Bluetooth printers that install as normal OS printers. | Paper width, driver availability, receipt layout, cutter behavior and cash drawer trigger. |
| Barcode scanner | Keyboard-mode scanners that type the barcode into the active field. | Barcode format, enter/tab suffix and scan speed at the billing counter. |
| Cash drawer | Drawers triggered through the receipt printer cash-drawer port. | Printer support, drawer cable type and opening behavior on bill close. |
| Weighing scale | Scales that expose a usable local connection can be tested during setup. | Protocol, cable, driver, unit format and whether staff need manual fallback. |
| Touch screen or tablet | Touch-friendly billing screens and shop LAN workflows. | Screen size, browser/app mode, counter Wi-Fi and permission setup. |
| Backup drive | External drive or secure local backup path for daily local backups. | Restore test, storage rotation and who checks backup success. |
Most barcode scanners that work like a keyboard can be tested quickly with Posnic. Scan into a text field first; if the code appears, the scanner is usually suitable.
If possible, ask first. Printer drivers, paper width, cash drawer trigger and weighing-scale protocol are easier to confirm before purchase.
No. Posnic can start on an ordinary computer, then add receipt printer, scanner, drawer or scale as the business needs them.