Connecting Square Printer with Airport Extreme and Hotspot

Your link doesn't work for me.

You should be aware that Apple removed "join a wireless network" as an option.. it no longer works in any of the later v6 utilities.

Even if you do use it later equipment will not work..

On older equipment when it does work.. it has a nasty effect..

The airport becomes a dumb client on the network.. the ethernet ports were turned off.. so the only access was via wireless.

I have connected the AX to the personal hotspot, but cannot get the printer to be visible to setup within the Square dashboard app.

Nothing plugged in by ethernet will work in this setup. (USB might work though. )

Apple does allow the express to be used as a wireless bridge. It is called client mode.

AirPort Express: How to join an existing Wi-Fi network in client mode - Apple Support

You can buy any other brand wireless bridge though.. there is no reason in this situation to buy apple product.

I am not too familiar on how to set up a bridge. Would using two Airports also do this?

Using a pair of apple routers.. any ones.. you can setup extend wireless which works same as wireless repeater.. the ethernet ports will remain active in both units.

But the airport that is used as the main unit must be plugged by ethernet into the modem or main router.. Hotspots do not usually provide ethernet and so are useless. If you can plug by ethernet into the main router/modem.. then it should work ok.

If you need specific help with the setup we need to know all the details.. what modem / router you have?? What model airports.. and what you are doing the setup on.. mac or ipad using airport utility??

Is it possible without having WiFi in the shop?

Sure.. much better to run ethernet.. the printer specs say ethernet.

One AX would connect to the hotspot and creating a network

But as I warned you the only airport that can do this is Express..

Once you run ethernet there is no need for a second airport.. you will simply plug it in by ethernet.

Then I presume you will connect the ipad via the hotspot.. so you still need wifi somewhere..

Did you follow the instructions in the link to client mode setup??

AirPort Express: How to join an existing Wi-Fi network in client mode - Apple Support

This will only work on the newer versions.. if your Express is old .. ie G wireless it won't work.

Join a wireless network is fine.. the express has the correct IP from your screenshot.. but the client is wrong.

You are showing an IP of 192.168.0.255

Did you set that manually?? That is the broadcast address and not a valid IP.

Under the hotspot configuration site, it shows...

IP Address192.168.0.1

WAN IP Address22.8.235.12

Those values are fine.

Your previous screenshot shows a client with IP of 192.168.0.255 .. that is not a valid address.

Change it manually if you must.

I brought everything home and plugged it into my router to test the printer and cash register. They work.

I am doing something wrong with the config.

Do I plug in the printer to the back of the airport into the WAN or LAN?

I can remember going through this with someone else .. it was working fine at home but everytime they moved the setup to a business area it fouled up.

The printer should be connected to LAN port.. but let me assure you that is irrelevant to your problem.. in this mode the Express is a bridge and WAN is assigned to LAN.

I do not think some of this software is up to commercial standards. And in a business situation.. using flakey wireless to run a vital part of a business.. is simply unwise.. cable it.. and use software that can be relied on.

Please directly post your screenshots.. it makes it much faster.. and lots and lots of them..

This is the one you posted on imgur that I saw was wrong.

The IP of the Airport Express is fine.. 192.168.0.112 is valid address.

Notice the connection says unknown.. that might be a problem.. so tap it or roll the mouse cursor over it (depending on if you are using Airport utility on ipad or computer). I need to know what the link speed is like.

Also do the same thing for the wireless clients.. 192.168.0.255 is NOT valid. The max usable address is 192.168.0.254 .. 255 is called the broadcast address. There are floating data boxes at least in the computer version which will give you more info. eg below.. I stuck the pointer over the last client in the list and the extra box pops up. This is helpful info.

Do you change it manually through airport utility, or through the T-Mobile hotspot website.

The IP should be controlled by the Hotspot.. so you will need to check there what is failing.