Use the DiagTool utility to detect the printer:
At the upper right corner, set the Interface to ETHERNET, then click Setup.
The list of printers should include your printer.
Record the printer's IP address, Exit.
Run the Driver Wizard.
Specify the model of your printer: Wasp WPL304
Specify Port, Create Port, Standard TCP/IP Port, New Port, Next.
Specify the Printer's IP address (2nd field auto-fills), Next.
Leave the default setting Standard: Generic Network Card, Next, Finish, Close.
Back in the Specify Port window, select the IP address port you just created, Next.
Continue installing the driver as usual.
Here is the direct download link to our label printer Diagnostic Tool. Download, save, and run it.
Printer driver for Wasp WPL printers: