I kept the static method I’d written for having a single, unique lock and changed it to create a single, unique dispatch queue. The static method, however, introduced a new issue I’d overlooked: upon logging out of the app, the queue would persist while the code blocks it ran tried to access deallocated data. This new issue finally pushed me to use an even higher level concurrency abstraction, NSOperationQueue (see Apple’s documenation for more details). NSOperationQueues are built on top of GCD but provide several extra features, including the ability to cancel operations. Moving printer communication code to an NSOperation subclass was a small amount of extra work that paid big dividends. By storing the operation queue as an instance variable on the print controller, I was able to cancel all waiting printing and printer discovery operations and deallocate the queue itself in just a few lines of code.
If you are using your iPad or iPhone by itself with the Square app, you will not be able to use a USB Star Micronics Printer. You will need either a Bluetooth Receipt Printer, or Ethernet Receipt Printer. A good reason for going with Ethernet, is that you can have multiple devices print to one printer. If you are using an Android device, you can use either an Ethernet Receipt Printer, or and of the USB Receipt Printer stated above as long as you use the USB OTG(on the go) adapter. Please note, Bluetooth is not currently supported on Android for Square.
With resistance to the most brutal environments, APG drawers feature sturdy steel frames powder coated in cloud white or black to resist scratches and other external abuse. Industrial grade steel ball bearing slides on the drawer won’t wear like silicon wheels and promote silky smooth opening and closing every time. The heavy duty latch mechanism is rated for over 4 million operations, allowing you to open the drawer 200 times a day, every day, for nearly 55 years.
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I do appreciate your post though and I wanted to let you know that we are working to provide support for more printers and your feedback is welcome! For example, we recently launched support for several Epson printers which can be used with Square on iOS devices (the full list of printers is here).
Ethernet invoice printers can be utilized to print consumer bills, order tickets and order ticket stubs. Ethernet-interface printers are best for fixed usage and aren’t developed to be mobile.The Ethernet printers suitable with Square Register are thermal printers. They need heat-sensitive paper and will not deal with non-thermal invoice paper. These kinds of printers aren’t perfect for kitchen areas or high-temperature workspace.
* All credit sale plans are issued by Square, Inc. Plans are not available to merchants located in AL, DE, MS, MO, NH, and TN. The individual authorized to act on behalf of the business must be a U.S. citizen or permanent resident and at least 18 years old. Valid U.S. bank account and Social Security number or Individual Taxpayer Identification Number are required. Plans may be selected from 3-, 6-, 12-, or 24-month terms and are based on the financing amount requested. The finance charge amount and installment payment amounts will depend on the repayment term selected. Sales tax, where applicable, cannot be financed and will be due upon acceptance of contract. The final payment will be equal to or less than the regular monthly payment. All plans are subject to approval based on credit and other factors.
If you have a Square Stand, in addition to the printers above, you can use certain USB interface receipt printers. The following receipt printers are only compatible with the Square Stand, not the Square card reader:
Star Micronics TSP100 futurePRNT is the first all-in-one receipt printer. Yes, all the parts and software are included in one box. To get you setup quickly, we’ve included an internal power supply, interface cable, power cable, complete mounting kits and a paper roll. To bring you the future of receipt printing now, we’re also including a full set of software utilities. Redesign your receipt without modifying your application. Add your logo. Add coupons. Preview receipts and enhance bar codes. Included operating system drivers allow for ‘Plug & Play’ automatic installation.
Unless proven otherwise, I agree. And in my business, giving a client a receipt on what amounts to a piece of adding machine paper is unprofessional. I should be able to use any printer that is compatible with the iPad, not just the uni-tasker receipt printers.
Be sure the printer and the iPad are connected to the same network. To confirm this or change your Wi-Fi network, go to the iPad’s Settings and tap “Wi-Fi” located in the left sidebar. Then select the network that the router is broadcasting and click “Connect”.
More sites.

SM-T300i Mobile Printer (SM-T300I2-DB50 US GRY), 3-Inch Print Width, Bluetooth 2.0, Serial Interface, (Includes Serial Cable, Battery Pack, AC Charger, Sample Paper Roll), Color: Gray (Part Number: 39634010)
To create your own bar codes and labels, you’ll need to use a third-party application. At the moment, we don’t support bar code and label printers and can’t guarantee compatibility, but many customers have success using the DYMO Label Writer 450 and labels with Square.
Effect printers just print order tickets for a cooking area. They’re not impacted by heat and can stand up to warm environments. They need heat-sensitive paper and will not deal with non-thermal, invoice printer paper.
Connect supported receipt printers, cash drawers, and bar code scanners to the Square app on the iPad. If you have any connectivity issues after following the steps below, learn how to troubleshoot your hardware.
SQUARE and SHOPIFY POS BUNDLE INCLUDES: • Square and Shopify recommended Star Micronics TSP654IIBI-24 Wireless/Bluetooth receipt printer. • Shopify/Square recommended printer driven 16X16 Cash Drawer. Comparable to APG 16×16 Vasario Series Cash Drawer Part #: VB320-BL1616 The compact footprint fits easily on your countertop and saves precious counter space. The clamshell design allows for fast and easy paper and ribbon loading. This printer can print 60 receipts per minute via Bluetooth connection, so you can tackle your daily needs with ease and efficiency. Pair it to your Shopify POS without a Wi-Fi connection. Need more counter space? Mount the printer to the wall with the included wall mount bracket. • Avoid complicated network setups – simply sync via Bluetooth, and you’re ready to print receipts from your iPad. • Uses thermal printing technology, so you’ll never need expensive ink or toner. • The Retail Package upgrade is required for this to connect to Shopify POS. Recommended for merchants who are looking for an easy to set up, reliable receipt printer.
Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon’s fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you’ll especially enjoy: FBA items qualify for FREE Shipping and Amazon Prime.
EOM-POS Thermal Receipt Printer- USB, Ethernet, Serial Ports- Auto Cut – Cash Drawer Port (RJ11/RJ12)- Paper Width 3 1/8″ (80mm) – NOT COMPATIBLE with Mac, Square, Shopkeep, Clover, Shopify, or Paypal
Note: Products sold through this website that do not bear the Apple Brand name are serviced and supported exclusively by their manufacturers in accordance with terms and conditions packaged with the products. Apple’s Limited Warranty does not apply to products that are not Apple-branded, even if packaged or sold with Apple products. Please contact the manufacturer directly for technical support and customer service.
If you are buying this for the Amazon Local Register payment platform, be sure to get the Ethernet version (not the USB version). This one only connects to your network and not directly to a computer.
Impact printers only print order tickets for a kitchen. They’re not affected by heat and can withstand warm environments. They require heat-sensitive paper and won’t work with non-thermal, receipt printer paper.

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