ECSPOSKit

Prints to an Epson ESCPOS-Compatible Receipt Printer.

Resources:

• ESCPOS Command Documentation
• Super Awesome IOUSB Sample Code

Basic Usage:

Add ESCPOSKit to your project:

• Either, add it via Xcode.
  1. Go to your .xcodeproj file, select your project, and choose the "Package Dependencies" Tab
  2. Click on the "+", and enter "https://github.com/Jacobingalls/ESCPOSKit.git" into the search
  3. Pick the appropriate version (right now only main), select the ESCPOS target, and add it to your targets.
• Or, add it via the Swift Package Manifest (Package.swift)
  • Add the package to your list of packages.

    .package(url: "https://github.com/Jacobingalls/ESCPOSKit.git", .branch("main"))
    

  • And, add the package as a dependency of at least one of your targets.

Then you may use it in your code.

import Foundation
import ESCPOS

let commands: [ESCPOSCommand] = [
    .justification(.center),
    .characterSize(vertical: .double, horizontal: .double),
    .ascii("Hello, World!\n\n"),
    .justification(.left),
    .characterSize(vertical: .normal, horizontal: .normal),
    .ascii("Welcome to the exciting new world...\nprinting reciepts.\n"),
    .printAndFeed(lines: 5),
    
    // Cutting is not yet implemented in Commands...
    .raw(.init([ 0x1D, 0x56, 0 ])),
]

let data = commands.map(\.dataValue).reduce(into: Data(), { $0.append($1) })

// My Epson TM-T20III Receipt Printer over USB
try! escposPrint(vendorId: 0x04B8, productId: 0x0202, data: data)