Conectar C# con impresora térmica

Send bytes to thermal printer with C# and ESC POS

In this article I will show you how to use native C# to open a thermal printer as a file and send it bytes or data including ESC POS commands.

Remember that I already have a plugin that allows you to print on thermal printers and exposes a consumable HTTP API from any programming language so that you can use it and not implement your own library, but if you want to see how it’s done, keep reading.


Imprimir códigos QR en impresora térmica

How to print QR codes on Thermal printer

Summary: In this post I will show you how to print readable QR codes on a thermal printer (also called ticket printer, pos printer, etc.) using JavaScript and a plugin.

If you have followed my posts, you will know that a long time ago I developed a plugin and I have added new features, until today we print QR codes on a thermal printer.

Some time ago I showed you how to print a ticket /receipt directly from browser, today we will use it to print a QR code.


How does the plugin for thermal printers work

A plugin for printing in thermal printers directly from browser

In this post I will introduce to you a plugin for printing tickets, receipts or invoices on a thermal printer using client-side JavaScript even if your web page or application is on a cloud server.

This plugin allows you to print directly from browsers, without dialogs and without browsers compatibility issues because you only have to send a HTTP request to print silently and in the background.


Ticket sample

Print receipt in thermal printer using JavaScript, CSS & HTML

In this post I will show you how to print a ticket or receipt by using JavaScript (client side) and a thermal printer. At the end we will have a great ticket that looks like this:

Ticket sample

Receipt printed in thermal printer using JavaScript only

Obviously you can change the font family, size, logo and so on. And remember: we will be using only pure CSS, HTML & JavaScript, no frameworks; though you can use any framework to render the content before printing.

You can see the demo here, and the full code on my GitHub.