ESC/POS Receipt Printer Emulator

🖨️ This app emulates a networked receipt printer to test your ESC/POS commands against.

About

• Windows application (WPF + .NET 9)
• Binds to a TCP/IP interface and listens for ESC/POS commands
• Logs commands and visually represents the resulting receipt(s)
• It support different text formattings in the same line, although a few combinations were tested.

👷 This is an unfinished experiment. Use at your own risk and keep your expectations low. :)

Supported commands

⚠️ Support is currently limited to only a subset of ESC/POS. Even the commands listed here may only be partially implemented.

• Raw Text
• LF: Line feed
• CR: Carriage return
• ESC Commands:
  • Initialize printer (ESC @)
  • Toggle italic (ESC 4 / ESC 5) [possibly deprecated?]
  • Select font (ESC M)
  • Select charset (ESC R)
  • Select character table (ESC t)
  • Select justification (ESC a)
  • Select line spacing (ESC 2 / ESC 3)
  • Toggle emphasis (ESC E)
  • Toggle underline (ESC -)
  • Toggle upside down (ESC {)
  • Set print text mode (ESC !)
  • Full cut (ESC m)
  • Partial cut (ESC i)
  • Print and feed n lines (ESC d)
  • Print and feed paper (ESC J)
• FS Commands:
  • Print stored logo (FS p n m)
  • Auto cut (FS } 0x60 n)
• GS Commands:
  • Select character size (GS ! n)
  • Select cut mode and cut paper (GS V m [n])
  • Paper eject (GS e n [m t])
  • Print barcode (GS k m [n] d1...dk [NUL])
  • Print raster image (GS v 0 m xL xH yL yH d1...dk)
  • Set barcode height (GS h n)
  • Set barcode width multiplier (GS w n)
  • Toggle inverted (GS B)

Example

Emulated printer

This program emulates a printer with the following specifications:

• 80mm paper width
• 72mm printing width
• 180x180dpi
• ASCII Font A: 12x24 pixels (42 columns)
• ASCII Font B: 9x17 pixels (56 columns)
• Automatic line feed