const ThermalPrinter = require('../node-thermal-printer').printer; const Types = require('../node-thermal-printer').types; const printer = new ThermalPrinter({ type: Types.EPSON, interface: process.argv[2], }); // Print all available charcodes for (let i = 33; i < 255; i++) { printer.print(`${i}: `); printer.add(Buffer.from([i])); printer.print(', '); } printer.cut(); printer.execute();