The following steps outline the process of configuring a QL420+ for wireless connectivity using WEP.

1. Before we configure the printer we will need to download Zebra’s Label Vista program, which is used to configure the QL420+ for wireless connectivity. Download Label Vista here: Label Vista v 3.5
2. Before connecting the QL420+ to your PC be sure that the unit is powered on, and media is present in the printer. When ready, connect to PC.
3. Windows should recognize a new device and install the necessary drivers.
4. Once the printer is installed and Label Vista is installed, begin device configuration by going to Printer, Com Port Setup.
   
5. Ensure the COM port is set to USB, and the USB Device selected is the QL 420+ device. Once it is set, click OK.
   
6. Got to Printer, Network Settings
   
7. Go to the Network tab, and configure the Network Port (6100), ESSID, and DHCP. Also configure the Request timeout and Requests per session as shown below. Click Apply, click OK.
   
8. Go to the WPA-PSK tab and configure as shown below. Click Apply, click OK.