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.
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Features: 100% Brand new and high quality! Compared to conventional thermal receipt printer, the printer has a smaller mini body, more reliable capability, more stable printing and portable advantages…
Print 58mm wide thermal paper, with 100km reliability TPH life. Paper Width: 58mm( -0.1mm). POS-5805DD mini thermal printer is compatible for iOS Android Windows devices, supporting BT(wireless), USB …
Please note, these printers can only be used with iOS devices at this time. I don’t have a timeline for when they’ll be supported with Android devices yet. But I’ll report back when I have an update! 😀
Learn more here.

It supports 58mm width thermal paper printing, with high printing speed, clear printing & low noise. You can connect your devices with the printer via BT 4.0 & 3.0, USB cable or serial port line. Prin…
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Everything you need to get started taking in orders and money (except the iPad and the cash for the till!). Includes, Square credit card reader,  receipt printer with Ethernet interface, 2 rolls of receipt paper, 13″ wide cash drawer with till, and all cables for connecting the printer and cash drawer.
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.
Square introduces more ways to engage with customers. Square now integrates with cash drawers and receipt printers. With a single tap on an iPad, you can open your register’s drawer to complete a cash sale or make change. Please read the options below carefully before purchasing a cash drawer.
We really like the Apple MFi certification with the auto connect feature. We also like the small footprint of this receipt printer. Overall this is one easy and fast printer to setup. The Apple MFi makes it real easy. You just turn the printer on within range of your iPad.
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). 
@usascottwright – While we don’t currently support Epson printers, it’s definitely a popular feature request. I’ll update this thread if that changes in the future! Also, apologies for the delay in following up with you. 
Last but not least, though I’m enough of a geek that the code itself would have been interesting and fun for me, it was really special getting to see first-hand how the product truly helped people. Meeting a merchant who had previously only been able to give out handwritten receipts, handing her a Bluetooth printer, and seeing how our new feature would make her job easier was the highlight of my summer.
If you need a remote Kitchen Impact Order Printer, the Star SP742ML or SP742ME will work for all applications. It is a Dot Matrix Receipt Printer and uses a ribbon, so you can print on carbon copy paper rolls, or standard single ply :
* 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.
POSGuys.com is here to help you find the right printer for your specific business needs. Call 800.903.6571 for assistance or email sales@POSGuys.com. If you’ve already purchased one of the Square Compatible printers from us and need help with your setup, email support@POSGuys.com.
I’m a software engineering intern at Square and have been working on Bluetooth printer support for iPad. This feature was released in our latest Square Register build and brings physical receipt printing using Star printers to a mobile customer base. Before this version, Register for iPad supported printed receipts through Star printers connected by WiFi and USB. Adding support for a new type of printer was a great choice for an intern project as it was a combination of building off of an existing hardware integration layer and extending it to support new concurrency requirements. Integrating this new feature into Square’s codebase was a great lesson of how a well-designed code base can make writing new code easier.
September 30, 2016 • Android Receipt Printer • Mobile Bluetooth Receipt Printer • Refurbished Thermal Printer • Square Compatible Receipt Printer • Square Hardware Bundle • Square Kitchen Order Printer • Square Stand Printer
Model MTP – 3. ● Bluetooth host function. ● Paper width: 80mm. ● Instruction set: ESC / POS. ● Paper type: Thermal label paper. ● Equipped with Windows computer side drive. ● Exquisite and lightweight…
Star Micronics TSP100Receipt Printer is the first All-in-One receipt printer on the market today!. The advantage of TSP143LAN Receipt Printer is evident for applications such as retail, restaurants, and convenience stores. TSP143LAN Receipt Printer is provided with all standard operating system drivers (Windows, Linux and Mac) and specialty drivers such as OPOS and JPOS. The printer is also directly supported in Square Register. Star has also included a number of embedded simple utilities that will enhance Retail or Hospitality CRM in POS applications and therefore make the entire experience simple. These printers come complete with every thing you need including printer, power supply, Ethernet cable, wall bracket and a roll of thermal paper.
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We are in no way affiliated with Square, Inc. Square, the Square logo, Square Register, and Square Reader, are registered trademarks or trademarks of Square, Inc. iPad​® is a trademark of Apple Inc. iPod touch®, and iPhone® are registered trademarks of Apple Inc. We are in no way affiliated with any of the brands or companies we mention in this website.
Connect your Square Stand with a compatible iPad and recommended hardware accessories to help run your business. Before purchasing a Square Stand, make sure you’re using a supported iPad. You can identify your iPad model on Apple’s Support site.
When you connect to the USB Receipt Printer or Ethernet Receipt Printer with the included cable, the cash drawer will open every time you complete a cash sale. Or use the included keys to manually open.
POSGuys.com Square Stand POS Kit The Square Stand point of sale kit leaves the guess work out of purchasing compatible hardware that is reliable and looks fantastic with the Square Stand. These kits are designed for customers who need every part to just a few pieces to make a complete Square Stand register.
APG’s Stratis tablet holder is designed for mobile and tablet point of sale applications. The Stratis enables an iPad to seamlessly slide over to the customer facing side for signature approvals, while giving the cashier a firm base to work from during the transaction process. A magnetic connection between the Stratis holder and a cash drawer holds the tablet firmly in place. Available in black or white.     $125.95 Black
Don’t forget, we also sell Square Compatible Hardware Bundles for all these printers that includes s Refurbished Receipt Printer and a New compatible cash drawer plus cables, paper and everything you need to get started!
Square is not interested in using anyone but Star. And their attitude is that they frankly don’t care. I know, I have emails from them about it. If I was to guess, I would bet they have a deal with Star that funds their (insert pizza parties, to silk pockets). But lets be realistic. I mean it has to be something viable, right? The fact that Star uses the same print protocals that Epson uses has no bearing on an Epson receipt printer not working. It goes in the same line as Android devices can’t use bluetooth devices… although that new chip reader is bluetooth. It is a lack of customer service and they need to step up to the plate, or someone is going to come along and take their business away from them.
I looked around for a hardware bundle for my Square POS setup and ultimately went with this combination. Very pleased with the product and the seller’s follow up was excellent. They answered several of my questions quickly and over the holiday weekend.
Built specifically to work in environments where heat and humidity can erode the type on the kitchen order, the SP700 is an ideal printing solution. This fast, two-color printer offers crisp, easy to read type for quick viewing, clamshell design for easy paper loading and an embedded power supply for space efficiency.
As a bluetooth only device, it is a bit glitchy. If you are wanting to use it with a phone/tablet only as a standalone device, look elsewhere. The miura m010 reader works great for this, though is unfortunately not available on amazon.
If you accept credit card payments from your customers at your place of business, you’ll want a receipt printer. A receipt printer automatically prints a receipt for your customer when they make a purchase.
Mini Bluetooth Printer is a portable thermal printer that combines USB, RS-232 Serial and Bluetooth communication interface together. Support IOS Android. It can print 58mm width thermal paper. Ther…
We recommend using the Square contactless and chip reader for a fast, seamless payment experience on all devices – not just those without a headphone jack. To accept magstripe-only cards, or gift cards, we recommend using the Apple Lightning to Headphone Jack adapter (included with the iPhone 7) to connect your Square magstripe reader. You might also try a third party USB-C to 3.5mm audio adapter, but please note that Square has not officially tested compatibility between the magstripe reader and other third party adapters.
I have my own iPad 2 and square stand. I was Looking for compatible hardware and this was excellent. The register and printer work great, I even ordered more papers for the printer so we will use it long term.
Did you just purchase a Square Stand or have the Square Register app running on your Android, iPhone or Tablet and need a Receipt Printer or Cash Drawer Hardware Bundle? There are a few different models and options for you to choose from when selecting a Thermal or Impact Receipt Printer and we will go over these here. We will cover other popular POS apps like Shopify, Breadcrumb, Shopkeep, PayPal Here and Clover in upcoming articles.
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. 
Atm it’s cheaper for me to use something else other than square, than to change the printer tablet setup. It appears other people have similar issues. Square managment need to grasp the economics here of only catering to a small hardware segment(Star printers) of the market, while marketing themselves as a simple DIY eftpos POS for small businesses, who burn themselves on compatability issues. Hopefully Square can solve this issue.