How do I print barcodes using Epson TM-U220B printer using Arduino?

Projects Programming
1

I use the library "GitHub - signalwerk/thermalprinter: A Library to control an Epson TM-T88II thermal printer (microprinter) by an arduino via serial connection" for normal writing already can, but if printing barcodes can't, is it ever using Epson tm-u220b printer to print barcodes?

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2

Is that print made with exactly the example sketch from the library?

In that case your printer doesn't support barcode printing.

3

The datasheet for the printer (https://www.allbarcodesystems.com/wp-content/uploads/2016/08/Epson-TM-U220-Series.pdf) doesn't say anything about barcodes but DOES indicate that it has a graphics character set which may be able to render barcodes.

That library is for the Epson TM-T88II Pos Thermal Receipt Printer which has a barcode mode. On the TM-U220 you will have to use the graphics characters to draw barcodes.