Hello,

I did customize in odoo11 serial number barcode print. I have added one button "print barcode" in serial number when you click on that button it will directly print barcode to pos printer(if you have configured it) . 
but the issue is, it always print blank in the printer, while I print to PDF it works fine.

I have used same code from pos printer for direct print to printer (with proxy) . the connection of printer is werking well but it prints blank,

How to print barcode on the label through printer? 

I have used code128 encoding for lable printing .

can anyone help in this?

Thanks!!