Hi,

For the Epson TM-U220D (USB) printer, connect it through an IoT Box or Virtual IoT, as USB models can’t print directly from Odoo.

In CUPS, use a Raw/Generic ESC/POS driver and ensure Odoo’s printer mode is set to Receipt Printer.

If the output shows symbols, switch to ESC* printing mode instead of GS v 0.

You can also try third-party printer bridge modules if you prefer not to use an IoT setup.

Hope it helps