Printing Reverse Text Always about esc_pos_printer

[michalsuryntequiqo]

Yeah, the same for me.
I’m using the newest version of the plugin, 2.1.2

[andrey-ushakov]

Humm interesting...

Could you please try to print something very simple:

final Ticket ticket = Ticket(PaperSize.mm80);
ticket.text('Hello world!');
ticket.feed(2);
ticket.cut();

Does it happen every time?

[renenucci]

Humm interesting...

Could you please try to print something very simple:

final Ticket ticket = Ticket(PaperSize.mm80);
ticket.text('Hello world!');
ticket.feed(2);
ticket.cut();

Does it happen every time?

Yeah, happens every time in all text, the shutdown moment still random.

I'll try with ticket.feed(2) line and tell if something change...

[andrey-ushakov]

Hi @renenucci,
Hi @michalsuryntequiqo,

What are your printer models, please?
Have you tested with a previous version of the library (before the Ticket class was created)?

[michalsuryntequiqo]

Before, the app was still using plugin version 1.0.0 and the printed text was fine (no background, just black text). After upgrading and refactoring code to use Ticket class, printer prints black backgrounds.

[renenucci]

Hi @renenucci,
Hi @michalsuryntequiqo,

What are your printer models, please?
Have you tested with a previous version of the library (before the Ticket class was created)?

Knup kp 1022 printer 80mm

Look at the test with your code (Hello World)
I'm using bluetooth mode, dont have wifi thermal to test..

Version of pub package
esc_pos_printer: ^2.1.2

[renenucci]

I commented the line in ticket.dart:

78: bytes += styles.reverse ? cReverseOn.codeUnits : cReverseOff.codeUnits;

And got this result:

Is almost fine, except by special sections (1 and 2), and underscore in all except regular.

For this printer, should we set some codetable ou something else?...
(https://novaknup.com.br/produtos/impressora-termica-smart-bluetooth-kp-1022/)

[andrey-ushakov]

Hi @renenucci, @michalsuryntequiqo

I've recently updated the library. It may fix the underline / reverse issues.

May I ask you to print a few test tickets using your printers to check if it helps, please?

[andrey-ushakov]

BTW, the Bluetooth printing moved to this package.

Feel free to create a new ticket in that repo if the issue persists.