Part 1: Connecting a New Terminal
Follow these steps for the initial setup of a new terminal.
Add the Device to the Dashboard In your sunday dashboard, go to the Terminals tab and click the + New Device button.
Name the Terminal Give your terminal an easy-to-identify name (e.g.,
Bar PDQ) and, to start, select the "Standard" configuration. Click "Create".Scan the QR Code A QR code will appear on your screen. Take your terminal and use its camera to scan this code. This will uniquely pair the device with your restaurant.
Tip: If the camera isn't working, you can manually enter the alphanumeric code located just below the QR code.
Once these steps are complete, your terminal is connected and ready to take payments!
Part 2: Modifying a Terminal's Configuration
To customize your terminals' settings (tip management, receipt printing, etc.):
Access the Configurations From your dashboard, go to the Terminals tab, then select the Configurations section.
Edit the Settings Click on an existing configuration (like "Standard") to edit it, or create a new one. Make your changes and don't forget to click Save.
Sync the Terminal To apply your new settings, you must sync each relevant terminal. To do this, on the terminal itself, typically go to the Settings > Sync Configurations menu.
Syncing forces the terminal to fetch the latest settings you just saved on the dashboard.
Q&A
How do I synchronize a payment terminal after a change in the dashboard?
On the payment terminal, go to the sunday application settings and click "Synchronize" to apply the changes.
Why is my payment terminal no longer detecting payment cards?
It could be a problem with your merchant agreement (if no cards work), contact your maintainer. Or it could be a contactless issue (if only NFC fails), restart the terminal.
The payment terminal no longer accepts contactless or phone payments, what should I do?
First, check with your maintenance provider that the "contactless" option is enabled in your merchant agreement, and ask Sunday Support to confirm. If it is, it might be a hardware failure.
Why does the payment terminal indicate a table is "already settled" when it's open on the POS?
If you have already added a payment by mistake to your table, the information has been sent to Sunday, so Sunday thinks the table is closed. If not, it's usually a network synchronization issue. Check the internet connection of the terminal and your POS system.
What does the "POS not notified" message on the payment terminal mean?
The terminal has successfully processed the payment but couldn't communicate it to your Point of Sale (POS) system, often due to network latency. The payment must be added manually to the POS with the correct payment method, usually "Card."
What should I do if the link between the payment terminal and the POS system is down?
Use the "Quick Payment" mode (or the "Skip" button) on the terminal to take payments, and manually enter these transactions into your POS system. Contact Sunday support to resolve the connection issue.
What is the "Quick Payment" mode on the payment terminal?
A feature to process an amount without linking it to a table from the POS. Useful if the POS connection fails, but requires manual entry in the POS.
How do I know if my payment terminal is properly connected to my POS?
The simplest test is to call up a table from the terminal. If the bill displays correctly, the link is active. If not, click the Settings icon in the SundayPay app, then click Network Test.
What should I do if only one payment terminal is no longer communicating with the POS, but the others are?
This is likely a Wi-Fi connection issue specific to that device. Make sure it is connected to the correct network, the same as the POS.
Last reviewed : 25/09/2026