How can I integrate SumUp card reader with Shopify POS for in-person sales?

[abrogated]

We're an online store in the UK and sell in-person from time to time.
When I'm doing a face 2 face sale, I want the whole process (adding customer details, recording transaction) be done on the Shopify POS app but I want to take payment using the SumUp card reader. How would I go about doing this?

[Jessica59]

Hi there, did you ever get a reply to this, or find out if possible? As we are in the same situation!