@phygrid/thermal-printer NPM

@phygrid/thermal-printer

A Node.js library for interfacing with thermal printers in the Phygrid ecosystem.

Installation

npm install @phygrid/thermal-printer

yarn add @phygrid/thermal-printer

Usage

import { ThermalPrinter } from '@phygrid/thermal-printer';
import { PeripheralInstance } from '@phygrid/hub-client';
// Initialize with a peripheral instance
const printer = new ThermalPrinter(peripheralInstance);
// Add text with formatting options
printer.addText('Hello World!', {
align: 'center',
size: { width: 2, height: 2 },
bold: true
});
// Add a QR code
printer.addQR('https://example.com', {
size: 8,
correction: 'H'
});
// Add a barcode
printer.addBarcode('123456789012', 'CODE128', {
width: 2,
height: 100
});
// Print everything
await printer.print();

API Reference

typescript constructor(peripheral: PeripheralInstance)

Add text to be printed with optional formatting.

align: 'left' | 'center' | 'right'
size: { width: 1 | 2, height: 1 | 2 }
bold: boolean
underline: boolean

Add a QR code to be printed.

model: 1 | 2 | 3
size: 1 to 8
correction: 'L' | 'M' | 'Q' | 'H'

Add a barcode to be printed.

Supported types:

'UPC-E'
'UPC-A'
'JAN/EAN8'
'JAN/EAN13'
'Code39'
'ITF'
'CODE128'
'CODE93'
'NW-7'

width: number
height: number

Clear all pending operations.

Print all queued operations and clear the queue.

Generate the final payload without printing.

Example

import { ThermalPrinter } from '@phygrid/thermal-printer';
// Assuming you have a peripheral instance
const printer = new ThermalPrinter(peripheralInstance);
// Create a receipt
printer
.addText('SALES RECEIPT', {
align: 'center',
size: { width: 2, height: 2 },
bold: true
})
.addText('\n')
.addText('Thank you for your purchase!', {
align: 'center'
})
.addText('\n')
.addBarcode('123456789012', 'CODE128')
.addText('\n')
.addQR('https://example.com');
// Print it
await printer.print();

Dependencies

@phygrid/hub-client

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