Barcode scanner iPhone USB/lightning

I am trying to use a Unitech USB barcode scanner on my iPhone to input serial numbers and asset tags into a spreadsheet. The scanner is rock solid inputing barcode data on my Mac, but when connected to either my iPhone or iPad, the scanner seems to have trouble reading the barcode, and when it does lock on, the scanner only registers part of the number.


This problem seems to have gotten progressively worse. We'd have occasional partial scans in the past, but usually the device would register the correct barcode data on a subsequent scan. Today, it's completely unusable. I am not able to get a valid scan at all.


I'm using a Lightning adapter to my iPhone X and an iPad Pro where the symptoms present on both devices. Yet, plugged into my MacBook, I can scan quickly and accurately.


Anyone else experiencing similar problems?

Posted on Feb 7, 2018 12:58 PM

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10 replies

Feb 7, 2018 8:02 PM in response to IdrisSeabright

No, but it worked quite well previously. I could scan barcodes into Notes, Numbers, Google Sheets, etc. It shows up as a keyboard when I plug it into my Mac, so I assume that's what it presents itself as when plugged into an iPhone. After working just fine for a few months, it started misfiring - sending only partial barcode numbers to the iPhone. Today it was 100% borked.

Feb 7, 2018 8:11 PM in response to y_p_w

I use an Apple USB-Lightning adapter (I assume Camera Kit). As I mentioned in other responses, it was working just fine before. I'm using the barcode scanner to scan inventory right into a Google Sheet (could also be a Numbers sheet or any other app that takes text input from a keyboard). I'm not aware of a way to scan barcodes directly into a text field with the camera. Even if I could, the handheld barcode scanner would be much faster and accurate, well, when it was working.


I am experimenting with QR codes for other business processes, and I could use the iPhone's camera there, but that's a different project.

Feb 8, 2018 7:28 AM in response to Kepano808

Kepano808 wrote:


No, but it worked quite well previously. I could scan barcodes into Notes, Numbers, Google Sheets, etc. It shows up as a keyboard when I plug it into my Mac, so I assume that's what it presents itself as when plugged into an iPhone. After working just fine for a few months, it started misfiring - sending only partial barcode numbers to the iPhone. Today it was 100% borked.

What did the manufacturer say about it? Have you tried a different adapter? A different phone?

Feb 8, 2018 10:27 AM in response to IdrisSeabright

The scanner in question has been EOL for a while. In fact, the iPhone was barely out on the market when this scanner was being sold. It has a USB connector, so should adhere to USB standards. The documentation indicates 100mA at 5v draw during operation which may be an issue (Apple does not publicly list the available power draw from the Lightning port). All that said, and as mentioned previously, the scanner worked well before, and it also worked on my iPad. It also worked on a co-workers iPhone 7. Now, it's not working at all. So, I'm leaning on the theory that a software update might have broken something.


I understand your question regarding stated support from Unitech. There is no mention of iPhone, but the usual suspects at the time (2008) are listed. I actually wasn't really expecting that it would work, but when it did (initially), I was excited and started building solutions around it. Barcode scanners such as this present themselves as keyboards to the host computer, so it's not unlike a keyboard you'd use with an iPad (e.g. the Belkin Secure Wired Keyboard for iPad with Lightning Connector, which draws power from the Lightning port) or even Apple's own original iPad keyboard dock.


I planned to evaluate a bluetooth barcode scanner (perhaps a 2D unit for greater flexibility), but I was hoping to stick with a hardwired solution to reduce points of error/confusion with the end-user. I really wanted to avoid users dealing with pairing issues in the field.

Feb 8, 2018 10:30 AM in response to Kepano808

Yeah, a lot of things that worked early by connecting to an iPhone through the dock connector stopped. Honestly, I'm surprised the scanner kept working for this long.


My suggestion for testing with another iPhone was to rule out the problem being the phone itself. If it doesn't work with another current phone, I'm inclined to agree with you that some recent change in software has caused it to stop working.


Best of luck.

Feb 8, 2018 10:49 AM in response to IdrisSeabright

Thanks, yes, problem replicates on other recent iOS devices. I'm going to try on my old 30-pin iPad 3 that I have charging up at the moment. I can accept - if regretfully - my original plan not working. Was hoping to build solutions around iOS, but this may be a case for a Chromebook or Linux or a pre-packaged solution (which is what I was trying to avoid in the first place.

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Barcode scanner iPhone USB/lightning

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