node-thermal-printer

Installation

Dependency requires build-essentials

sudo apt-get install build-essential

$ npm install node-thermal-printer

Features

printer.init({
  type: 'star',                                     // Printer type: 'star' or 'epson'
  interface: '/dev/usb/lp0',                        // Printer interface
  characterSet: 'SLOVENIA'                          // Printer character set
});

printer.isPrinterConnected()                        // Check if printer is connected
printer.execute();                                  // Executes all the commands
printer.raw(new Buffer("Hello world"));             // Print instantly
printer.print("Hello World");                       // Append text
printer.println("Hello World");                     // Append text with new line
printer.cut();                                      // Cuts the paper

printer.bold(true);                                 // Set text bold
printer.drawLine();                                 // Draws a line
printer.newLine();                                  // Insers break line

printer.alignCenter();                              // Align text to center
printer.alignLeft();                                // Align text to left
printer.alignRight();                               // Align text to right

printer.setTypeFontA();                             // Set font type to A (default)
printer.setTypeFontB();                             // Set font type to B

printer.setTextNormal();                            // Set text to normal
printer.setTextDoubleHeight();                      // Set text to double height
printer.setTextDoubleWidth();                       // Set text to double width
printer.setTextQuadArea();                          // Set text to quad area

printer.leftRight("Left", "Right");                 // Prints text left and right
printer.table(["One", "Two", "Three"]);             // Prints table equaly
printer.tableCustom([                               // Prints table with custom settings (text, align, width, bold)
  { text:"Left", align:"LEFT", width:0.5 },
  { text:"Center", align:"CENTER", width:0.25, bold:true },
  { text:"Right", align:"RIGHT", width:0.25 }
]);

printer.code128("Code128");                         // Print code128 bar code

print.clear();                                      // Clears printText value
print.getText();                                    // Returns printer buffer string value
print.getBuffer();                                  // Returns printer buffer

Code 128 settings

printer.code128("Code128", {
    width: "LARGE",          // "SMALL", "MEDIUM", "LARGE",
    height: 80,              // 50 < x < 80
    text: 2,                 // 1 - No text
                             // 2 - Text on bottom
                             // 3 - No text inline
                             // 4 - Text on bottom inline
}); 

Examples

var printer = require("node-thermal-printer");
printer.init({
  type: 'epson',
  interface: '/dev/usb/lp0'
});
printer.alignCenter();
printer.println("Hello world");
printer.cut();
printer.execute();