How do I connect a USB printer on Android?

Use this guide for a USB receipt or kitchen printer plugged into an Android tablet running Sidro POS.

Before you start:

• A USB thermal printer that uses ESC/POS, with 58mm or 80mm paper loaded
• A tablet that can use USB devices. If the tablet only has a USB-C port, you may need a USB-C to USB adapter (OTG).

Connect and set it up:

1. Plug the printer into the tablet and turn the printer on.
2. In Sidro POS, tap the More tab, then under Station tap Thermal printers.
3. Tap Add profile and type a Profile name, for example Counter USB.
4. Under Transport, tap USB.
5. Under Connected USB printers, tap your printer. If it is not listed, tap Refresh.
6. Under Paper, choose the Paper width (58mm or 80mm).
7. Tap Save profile.
8. Under Printer roles, tap the printer under Receipt printer (and Fulfillment printer or Batch summary printer if needed).

Test it:

1. Under Saved profiles, tap Test print.
2. The first time, Android asks if Sidro POS can use the USB device. Tap OK (or Allow).
3. You should get a slip that says "Sidro POS test print". Tap Done.

Common fixes:

• "USB host is not available on this device.": this tablet cannot use USB printers. Use a Bluetooth or network printer instead.
• "No USB printers found. Plug in a USB printer, then refresh.": check the cable and adapter, turn the printer on, then tap Refresh.
• "USB printer permission was denied.": tap Test print again and tap OK when Android asks.
• "USB printer not found for vendor/product ids.": the printer was unplugged or swapped. Plug it back in, then tap Edit on the profile and pick it again.