If you find the Connector is not working go through some of these steps. 


NOTE: This list is non -exhaustive and if you find that you are still having trouble connecting please do not hesitate to contact the relevant local support team within K3 @ Support - K3 (k3btg.com)


  • Check the Power, USB and Ethernet connections.
  • Ensure the correct Connector is selected via the POS using the USB icon.​

Green Bar = This is the selected Connector and is working as expected.
Red Flashing Bar = This is the selected Connector but there is a problem.
Green Dot = The Connector is available but not selected.
Red Dot = There is an issue with the Connector.

  • Ensure everything is connected correctly. See @Installing Hardware for more information.
  • NOTE: Ensure nothing but the supplied hardware is plugged into the Connector.
  • The Wi-Fi Connector on the rear of the unit should not be relied on for connectivity we advise a hardwired connection.
  • If the Connector is being used with just a label printer alone, the label printer must still be plugged into the lower USB port. 
  • Ensure the Connector is plugged in and the power cable, power brick is assembled correctly, and the socket switched on.
  • Ensure the Ethernet cable is plugged into a live socket, router or otherwise attached to LAN.
  • If a live Ethernet connection is not available when the Connector boots it will wait 5 minutes before defaulting to the previously cached IP and It will  continue to boot.
  • If your Connector prints the start-up slip but you cannot still connect and the boot time has been longer than normal, we recommend you connect a screen to the Connector to check it's not waiting for an IP address to be issued by DHCP.
  • Ensure the Ethernet connection is working by using another compatible device.
  • Ensure the Receipt printer is powered on and connected via the USB/Serial Converter before booting the Connector.
  • If any cables are removed while the Connector is powered on, then the Connector must be rebooted.
  • Is there sufficient paper in the Receipt Printer and the lid closed correctly.
  • Ensure the Printer is powered on and connected via the serial cable and USB/Serial Converter.
  • Check the Start up slip has been printed, if its blank check that the paper is correctly installed into the printer.
  • If using a Epson TM88 Printer after 90 seconds after boot up  if the Start Up Slip has not printed check the DIP Switches.
  • If the Start Up Slip has printed check for the IP address if there in no IP shown please check your router and network setup.
  • Is the Connector listed in Platform Admin, you should be able to see a local IP address and a 'last seen' date. If the Connector is listed but there is no IP contact K3. 
  • If the POS is showing the Connector as offline (red flashing dot) then this is often a sign the certificate is not installed correctly. Please check in the Certificate Manager for your operating system for the certificate, and if necessary re-install.
  • Ensure the Connector is set up in Admin. The ID must match the unit ID on the printed slip. NOTE: The hex code should be exactly 6 sets of numbers, letters and are separated by - not : as displayed on the Start Up Slip.