const ThermalPrinter = require('../node-thermal-printer').printer; const Types = require('../node-thermal-printer').types; async function testConnection () { const printer = new ThermalPrinter({ type: Types.EPSON, interface: process.argv[2], }); printer.getStatus(); try { const status = await printer.execute({ waitForResponse: true }); console.log('Printer status:', status); } catch (e) { console.error('Print failed:', e); } } testConnection();