If you have trouble printing receipts, use the following tips for Ethernet interface, USB interface and Bluetooth receipt printers.

Troubleshoot Ethernet Interface Receipt Printers

  • Turn your device’s Wi-Fi off and then on again. For Ethernet printers, confirm your device and printer are on the same network.
  • Turn your device completely off and then back on.
  • Turn your receipt printer off and unplug all cables. Plug all cables back in and turn the receipt printer on.
  • Make sure the receipt printer is fully plugged in and a roll of paper is in the printer.
  • Turn your Wi-Fi router off and then on again.
  • Ensure the Wi-Fi router is working and that your device is connected.
  • Ensure that the Ethernet cable connecting the receipt printer to the Wi-Fi router is properly connected to the Ethernet port on each device.
  • Ensure your devices OS and the Square app are up to date.

Often printer errors are due to connectivity or Wi-Fi issues. If you continue to have trouble, contact Star Micronics’ technical support or your wireless router manufacturer for troubleshooting tips.

Troubleshoot Bluetooth Receipt Printers

  • Make sure the printer isn’t already paired to another device.
  • Turn your device’s Bluetooth setting off and then on again.​
  • Ensure your device’s OS and the Square app are up to date.
  • If you have the SM-S220i or SM-T300i printer, confirm that the printer is set to Bluetooth (iAP) mode. To do so:
    1. Press and hold MODE for at least 5 seconds.
    2. After the ERROR LED flashes five times, you can configure the settings.
    3. The current mode will appear on the display.
    4. Press MODE once to change to “Bluetooth (iAP)” instead of Bluetooth.

If you continue to have trouble with your Bluetooth printer and it’s a Star Micronics model, contact the Star Micronics support team for more information.

Note: For additional troubleshooting tips for your iPad or iPhone’s Bluetooth connection, visit Apple’s website.

Troubleshoot USB Interface Receipt Printers

If you’re having trouble with a USB receipt printer connected to an Android device:

  • Ensure the USB printer is plugged into an power outlet.
  • Ensure the USB printer is firmly connected to your Android device via a USB cable and an On-The-Go adapter.
  • Make sure there’s a roll of thermal receipt paper in the printer.
  • Turn your device completely off and then back on.
  • Ensure your devices OS and the Square app are up to date.
  • Delete and reinstall the Square app.
  • Turn your receipt printer off and unplug all cables. Plug all cables back in and turn the receipt printer on.