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Square Register Troubleshooting

There are basic checks you can do for issues you may encounter with Square Register. Make sure to walk through the following before going through issue-specific troubleshooting steps:

General Troubleshooting

  • Make sure your device is connected to power. Square Register needs to be powered to function.

  • Make sure your device has the latest software. To update your Square Register software, tap the down arrow at the top of your Register and:

    1. Select Settings.

    2. Tap Hardware > General > About Register.

    3. Tap Software Update. If there is no update, your software is up to date.

  • Make sure your device’s date and time are accurate. If they are incorrect, update them via the Settings > General section.

  • Make sure your Square account is activated.

Customer Display Troubleshooting

Connectivity

Is the customer display connected to Register properly?

  • If your device is docked:

    • Make sure that the display is docked completely and evenly on both sides. There should not be any gap between Register and the customer display and you should hear the latch click on both the left and right sides of the customer display.

    • See if undocking and connecting the customer display via USB cable works. This can help Square diagnose whether there is an issue with the docked position only.

  • If undocked and connecting via USB cable:

    • Make sure that the USB cable is plugged in properly into both the customer display and the bottom of Register.

    • See if docking the customer display works. This can help us diagnose whether there is an issue with the undocked position only (it is possible that there is an issue with the cable that connects to two devices).

Display Issues

Most display issues, such as a few common ones listed below, are resolved by undocking/docking or unplugging/plugging in the customer display. You can also reboot the system by using the power on the bottom edge of Square Register.

  • Customer display not responding to touch.

  • Customer display frozen on one screen.

  • Customer display stuck on the Square logo.

If you’re still having trouble after you’ve tried these troubleshooting steps, please Contact Square Support.

Wi-Fi Troubleshooting

Confirm Square Register is connected to Wi-Fi
Toggle Wi-Fi off and on in Settings and check to make sure that you see a tick mark next to the network to which you are trying to connect. Confirm that you see the Wi-Fi status indicator on the top right corner of the status bar.

Keep in mind, you won’t be able to connect your Square Register to a captive portal network. A captive portal is a network that requires you to agree to terms or conditions to access the internet connection (these networks are common at coffee shops, airports, and other public internet access points).

Confirm Wi-Fi signal strength
Confirm that you have a strong Wi-Fi signal by checking other devices (such as phones, tablets or laptops) on your network near the location of your Square Register. The Wi-Fi status indicator in the upper right corner of the status bar should have 3-4 white bars to indicate a strong signal. Depending on the position of your router, you may need to move your Square Register closer to your router. If the status bar does not show 3-4 white bars, consider contacting your network provider.

Switch to Ethernet
If you have an Ethernet connection available, switch to Ethernet by plugging in a cable between the port on the Hub and a spare port on your router.

Ethernet Troubleshooting

Confirm Square Register is connected to Ethernet
Confirm that you can see the Ethernet network status indicator in the top right corner of the status bar. If you don’t see the Ethernet network status indicator, try unplugging and plugging in the cable from the Ethernet port on the Hub and from the router or modem.

Confirm modem/router connectivity
Test your modem and/or router by plugging in other devices (such as a laptop) and seeing if they connect to the internet.

Switch to Wi-Fi
If you have a Wi-Fi network available, unplug the Ethernet cable and switch to Wi-Fi in Settings. Make sure to unplug the Ethernet cable since the device will default to using Ethernet connection over Wi-Fi an Ethernet cable is connected.

Hub Connectivity Troubleshooting

Test another accessory
To determine whether there is an issue with the Hub or with the USB hardware accessory (printer, barcode scanner, cash drawer, USB scale), try connecting a different USB hardware accessory to the Hub.

Test USB ports
Try plugging the USB hardware accessory into a different port. It’s possible the issue may be isolated to one port.

Payment Troubleshooting

Customer display doesn’t recognise tap/contactless payment.

  • On Square Register, confirm that you’ve pressed the Charge button to activate the customer display to accept contactless cards/phones. The LED indicators should light up when you tap the Charge button.

  • It is also possible that the contactless card or NFC-enabled phone is damaged or broken. In this case, ask your customer to present a different form of payment.

Chip cards aren’t recognised.

  • Ensure chip cards are inserted with the chip facing towards the buyer when the customer display is undocked, and facing upwards when the customer display is undocked.

  • If contactless payments still work, the chip may be damaged. In this case, ask your customer to present a different form of payment.

  • It is also possible that if contactless payments still work, something may have damaged the chip card slot.

Reset your Register

On rare occasions, you may need to perform a factory reset. Don’t worry: resetting your device will not erase important account settings like items, transaction histories, customer lists, or team permissions. It will all be there when you sign back in.

Before resetting your Register, please have the following information on hand since you’ll need it to log back in afterwards:

  • Wi-Fi network name and password.

  • Account login information (email and password) or device code.

  • Location name, if applicable.

  • Accessory settings: printer stations, cash drawers, barcode scanners, USB scales and any other accessories. Our recommendation is to take a picture of the configuration of each accessory before resetting.

To reset your Square Register:

  1. Tap the down arrow at the top of the Register > Settings > Hardware > General > About Register.

  2. Scroll to the bottom of the screen and tap Factory Reset > Confirm Factory Reset.

  3. Tap Reset one last time. The countdown will begin and your Register will reset.

Once the reset is complete, you’ll need to reconnect to your internet connection and sign back in.

  1. Go back through basic setup questions like your time zone, date, and language.

  2. Reconnect to the internet and sign back in with your email and password or device code.

  3. Add accessories such as cash drawers, printers or barcode scanners. Learn more about connecting compatible hardware to Square Register.

  4. Adjust any settings back to your preferences.

Network Requirements

Protocol/Port Whitelisting

If you enforce restrictions on what protocols and ports that devices on your network can access, Square devices require the following protocols and their corresponding ports to be allowed through your firewall:

  • NTP. Note: This is critical for ensuring that the device has the correct time. Connectivity may fail due to certificate validity mismatches if the device time is wrong.

  • HTTPS (only port 443). Note: All traffic to Square servers is made over HTTPS.

The following ports are also used for network printers, but these do not require access to the internet:

  • UDP: 22222, 3289

  • TCP: 9100:9109

Domain Filtering

If you enforce restrictions on what domains can be accessed from within your network, Square devices require the following domains to be whitelisted.

HTTPS traffic
All subdomains of:

  • squareup.com

  • issquareup.com

  • squarecdn.com

  • cash.me

  • cash.app

  • squarecloudservices.com

As well as the following FQDNs:

  • api.skyhookwireless.com

  • notify.bugsnag.com

  • sessions.bugsnag.com

  • apytiqcuyrsq6-ats.iot.us-east-2.amazonaws.com

  • square.site

  • www.weebly.com

  • api.mapbox.com

NTP traffic
NTP requires access to:

  • time.android.com

IP Addresses

Square’s IP address ranges are:

  • US: 74.122.184.0/21

  • Asia/Pacific: 103.31.216.0/22

  • Europe: 185.57.56.0/22

Square devices also rely on access to Amazon Web Services (AWS) and Google Cloud Platform (GCP). AWS IP ranges are published here, and Google is AS15169.

Note: Square devices have an internal firewall and an internal (domain, not IP) whitelist, and perform TLS certificate pinning on all Square endpoints, so you may consider the IP whitelisting on your side redundant depending on your purpose. It could make sense to just ensure Square devices can’t access any internal company IP addresses, and leave the rest of the internet open for Square’s on-device firewall and domain filter.

MAC Addresses

Square’s MAC OUI: 2C:D1:41

Merchants should whitelist all MAC addresses that start with the above prefix (ie. devices with MAC addresses following the pattern 2C:D1:41:XX:XX:XX). Alternatively, merchants can whitelist each individual device that shows up with that MAC address prefix (this prefix is owned by Square and should not be used by any other device vendors).

DNS

Square devices are compatible with any DNS server sent to the device over DHCP as long as it works. Feel free to use your ISP’s servers, or your favourite public servers (e.g. Level3 at 4.2.2.1/4.2.2.2).

Supported Network Authentication Protocols

Square devices support:

  • WPA/WPA2 PSK

  • WEP (US only)

They do not support:

  • WPA/WPA2 Enterprise

  • WPA3 PSK/WPA3 Enterprise

Cleaning your Register

For minor scuffs and marks, you can use any electronic cleaning cloth with your Square Register.

To clean the card slot on Square Register, you can use card reader cleaning cards. To clean the magstripe slot, slide the cleaning card or a folded paper towel through the magstripe slot to clear any spills or debris.

If you are still having trouble, please contact Square Support and we can help get you back to business.

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