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pos-printer

Ruby library for printing using ESC/POS (thermal) printers using CUPS.

Install

Add the following line to Gemfile:

gem 'pos-printer'

and run bundle install from your shell.

To install the gem manually from your shell, run:

gem install pos-printer

Usage

require 'pos-printer'

POS::Printer.print('my-printer-name-on-cups') do |p|
  p.align_center
  p.print_logo
  p.big_font
  p.text 'MY HEADER'
  p.align_left
  p.small_font
  p.text 'some body'
end

You may also specify extra options to pass to lp:

require 'pos-printer'

POS::Printer.print('my-printer-name-on-cups', lp_options: ['-h', 'somehost:port']) do |p|
  # Your printing code
end

More Information

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pos-printer's Issues

Some spanish characters require multilingual character table

pos-printer/lib/pos/printer.rb

Line 103 in 0b920aa

.gsub("Á".b, "\xB5".b)

pos-printer/lib/pos/printer.rb

Lines 105 to 107 in 0b920aa

.gsub("Í".b, "\xD6".b)
.gsub("Ó".b, "\xE0".b)
.gsub("Ú".b, "\xE9".b)

These four character substitutions will work only when the character code table set for the printer is Multilingual ("\et\x02"). When the character code table is the default one (USA, Standard Europe, "\et\x00") different characters are shown.

Examples of this can be seen in the reference manual

No matter what i do, print_logo doesn't work

Every time I try to add a picture/logo, nothing happens.
The print_logo function doesn't work for me, maybe I'm doing it wrong, but when I add just 'print_logo' nothing happens, so I add something for it to print, a link or a file path or something like that, I get an error saying 'The wrong number of arguments given, expected 0 got 1'
So I'm not supposed to give it anything to print (how is it supposed to know what I want to print???) and if I do, I get an error, has anybody else gotten this? What do I do to get an image to work?

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