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I can't figure out a way to print on a POS machine(EPSON TM-T20III).

I have tried creating a text file and then printing it. It works, but I have no control over alignments, font type, font size, or specifying printer(at least 2 printers will be connected). So I came across this Python library called Escpos. Here is my code using that library:

from escpos.printer import Usb

#######(vendor id, device id, 0, profile)
p = Usb(0x6&398681A4, 0x1, 0, profile="TM-T20III")
p.text("Hello World\n")
p.cut()

This code can't find my printer:

error: USBNotFoundError("Device not found or cable not plugged in.")

I'm suspecting that I may have the wrong details for the vendor id and device id. I got them by:

  • Open the Device Manager by right-clicking on the Start button and selecting Device Manager.

  • Expand the Printers section.

  • Right-click on your printer and select Properties.

  • Click on the Details tab.

  • In the Property drop-down list, select Hardware IDs.

  • The vendor ID and product ID will be listed in the Value column.

    • This is what I'm getting: usbprint\epsontm-t20iii2dac

  • In the Property drop-down list, select Device instance path.

    • This is what I'm getting: USBPRINT\EPSONTM-T20III\6&398681A4&1&USB002. Accoding to chartGPT the Vendor id is 0x6&398681A4 and the product id is 0x1

Note: Network connection if off the table for me. Thank you for helping

Tinashe Mphisa
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  • Please check the USB ID with the utility distributed by EPSON, not with the device manager of the OS. [TM-T20III Utility](https://download.epson-biz.com/modules/pos/index.php?page=single_soft&cid=6176&pcat=3&pid=6146) – kunif Jun 30 '23 at 07:16

0 Answers0