node-thermal-printer/examples/usb.js

Print on Epson, Star, Tranca, Daruma and Brother thermal printers with Node.js

const usb = require('usb');
const ThermalPrinter = require('../node-thermal-printer').printer;
const Types = require('../node-thermal-printer').types;


function getStringDescriptor(device, descriptorIndex) {
  const stringDescriptor = device.getStringDescriptor(descriptorIndex);
  return stringDescriptor ? stringDescriptor.toString() : '';
}

// Get a list of USB devices
const devices = usb.getDeviceList();

// Display information about each device
devices.forEach((device, index) => {
  console.log(`Device ${index + 1}:`);
  console.log(`  Device Name: ${getStringDescriptor(device, device.deviceDescriptor.iProduct)}`);
  console.log(`  Vendor ID: ${device.deviceDescriptor.idVendor}`);
  console.log(`  Product ID: ${device.deviceDescriptor.idProduct}`);
  console.log('--------------------------------------');
});

// List all USB devices
usb.getDeviceList().forEach((device) => {
  console.log(`Device: ${device.deviceDescriptor.idVendor}:${device.deviceDescriptor.idProduct}`);
});

usb.on('attach', function (device) {
  console.log(`Attach: ${device.deviceDescriptor.idVendor}:${device.deviceDescriptor.idProduct}`);
});

// Replace these values with your printer's Vendor ID and Product ID
const vendorId = 4070; // Vendor ID
const productId = 33054; // Product ID
// const vendorId = 1305; // Vendor ID
// const productId = 3; // Product ID

const device = usb.findByIds(vendorId, productId);

if (device) {
  console.log(`Found your printer: ${vendorId}:${productId}`);

  // Open the USB device
  device.open();

  // Define your control transfer parameters and command
  const bmRequestType = usb.LIBUSB_REQUEST_TYPE_CLASS;
  const bRequest = 0x01; // Custom control request (replace with the correct value)
  const wValue = 0x0000; // Replace with the correct value
  const wIndex = 0x0000; // Replace with the correct value

  const dataBuffer = Buffer.alloc(4); // Buffer for data, if any



  const printer = new ThermalPrinter({
    type: Types.EPSON,
    interface: process.argv[2],
  });

  printer.getStatus();

  console.log(dataBuffer, printer.getBuffer())

  // Send the control transfer
  device.controlTransfer(bmRequestType, bRequest, wValue, wIndex, printer.getBuffer(), (error, data) => {
    console.log(error, data)
    if (error) {
      console.error('Control transfer error:', error);
    } else {
      console.log('Control transfer data:', data);
    }

    // Close the USB device when done
    device.close();
  });
} else {
  console.log('Printer not found');
}