Most Bluetooth receipt printers connect to an Android phone in under five minutes. The ones that do not usually fail for one of a handful of reasons, and almost none of them are faults. This is the order to do things in, and what each symptom means when it goes wrong.
Before you start: Bluetooth Classic or BLE?
There are two kinds of Bluetooth in cheap receipt printers, and the box rarely says which one you are buying.
Bluetooth Classic (sometimes written SPP, BT 2.1 or BT 3.0) behaves like a cable. The phone opens a connection, pushes the receipt down it, and the printer prints. This is what nearly every printing app, including ours, talks to.
Bluetooth Low Energy (BLE, BT 4.0 “only”) was designed for fitness bands and sensors. A BLE-only printer pairs happily, shows a tick in the phone’s Bluetooth list, and then never prints a line, because it is waiting for its own manufacturer’s app to speak to it in its own way.
Many printers do both, which is fine. The trap is the BLE-only model, often the cheapest one in the search results. If the listing says “BLE” without also saying “SPP” or “Classic”, treat it as a gamble. Our printer guide has the models and the signs to look for.
Step 1: charge it, load paper, run the self-test
Nothing about pairing can be judged on a flat battery. Charge the printer fully first.
Load a roll of thermal paper and close the lid until it clicks. Then run the printer’s self-test: on most models you hold the feed button while switching the power on, and the printer prints a page about itself. That page is worth keeping. It usually shows the printer’s Bluetooth name, sometimes its pairing PIN, and the paper width it thinks it has.
If the self-test page is blank, stop here. The paper is in backwards or it is the wrong paper, and no amount of Bluetooth will fix that. This guide covers blank and faded printing.
Step 2: pair in Android’s Bluetooth settings first
Do not start in the printing app. Pair the printer with the phone the way you would pair headphones: Settings, then Bluetooth (or Connected devices), then Pair new device. The printer appears under the name from its self-test page. Common ones are things like “BlueTooth Printer”, “MTP-II”, “Printer001” or the brand name.
If it asks for a PIN, try 0000, then 1234. Those two cover nearly every receipt printer made.
If the printer does not appear at all: switch it off and on again, make sure nothing else is already connected to it, and stand within a couple of metres. Some printers stop advertising themselves after a minute or two of being switched on, so a fresh restart often does it.
Step 3: choose it in the app and print a test page
Now open the printing app. In OrderPrint that is Settings, then Printer, then Bluetooth, and the paired printer is in the list. Choose it, set the paper width (58 mm or 80 mm, it is printed on the roll’s packaging), and run a test print.
On Android 12 and newer the app will ask for a “Nearby devices” permission the first time. That permission is what lets an app see Bluetooth devices at all. Deny it and the printer list stays empty, with no other error.
A test page that prints cleanly means the whole chain works. Everything after this point is about keeping it working.
It paired, but it will not print
This is the most common support question we get, and the tick next to the printer’s name is the misleading part. “Paired” only means the phone and printer have exchanged keys. It says nothing about whether data can flow. In rough order of how often each one turns out to be the cause:
It is a BLE-only printer. See above. It will pair forever and print never. There is no setting for this; the printer has to go back.
Something else is holding the connection. Receipt printers take one connection at a time. If the laptop you used for setup, or the old phone, is still paired and in range, it may grab the printer first. Unpair the printer from every device you are not using.
The printer went to sleep. Battery printers switch themselves off after ten or fifteen minutes of silence. Some wake up when a job arrives; many do not. Look for an auto-off setting in the self-test page, or keep the printer on its charger with the lid closed.
The phone killed the app. If the first test print worked and later orders did not, the printer is probably fine and the phone’s battery manager has closed the app. This happens on Samsung, Xiaomi, Huawei and Honor phones in particular, and the fix is in the phone’s battery settings, not the printer.
Wrong width. A 58 mm printer set to 80 mm does not print nothing; it prints a mess, with lines cut off or garbage characters. If you are getting output, however bad, the connection is fine and the setting is wrong.
Too far, or through too much. Bluetooth is a few metres through air and much less through a fridge, a steel counter or a wall. Keep the phone and printer on the same surface.
Keeping it connected through a service
A printer that connects on Monday and drops out on Friday is almost always a power or pairing problem, not a Bluetooth one. Four habits remove most of them:
Keep the printer on mains power if it has the socket for it. Give it one phone and never pair anything else to it. Keep the phone in the same place, close to the printer, and charging. Run a test print at the start of every service, when a failure costs nothing.
Bluetooth or Wi-Fi for a busy counter?
For a single counter with one phone, Bluetooth is fine and needs no network at all. For a kitchen with a pass, a bar and a phone that moves around, a network printer with a fixed IP address is steadier: it does not care where the phone is, it does not sleep, and more than one device can send to it. The printer guide compares the two properly.
Either way, the app’s job is the same: watch the mailbox, and when an order email arrives, print it. OrderPrint does that on any Android phone, with the first 100 orders a month free, and the test print in setup tells you within a minute whether your printer is one of the ones that just works.