Log in to your backoffice at seamlesshq.co.uk and go to 'System Settings'
Enable SumUp and 'Default' if this is the primary method of card payment for your business.
3. Click connect SumUp and Log into SumUp using your credentials
4. After logging in, your sumup reader will be detected and paired to your account
5. If no readers are detected, you will be taken to the Pair a Reader tab;
Follow the directions here to pair your reader
https://developer.sumup.com/terminal-payments/guides/pairing-solo
6. When you click on Pair Reader, your reader will be paired and connected to your system