If you use either a Star TSP100(143) LAN/Ethernet or Star 650 Bluetooth printer and you are having trouble printing from Retail POS on your iPad, you can use Star's StarPRNT SDK app to verify whether your printer can print at all.

1. Download the StarPRNT SDK app.

2. Select the Destination Device at the top of your screen.

   

3. Select the LAN or Bluetooth interface and select the printer.

4. Back on the main page, click Sample under Printer.

   

5. Select a paper size and receipt type.

If the receipt prints then there is a connection issue between your iPad and the printer. If the receipt does not print and gives you an error, that usually means that it is a hardware or connection issue as opposed to the Retail POS app failing to print. Contact Star Micronics who will need to diagnose the problem further.