Connecting a till or payment terminal to a web platform
Connecting a physical till or payment terminal to a web platform, one-way or both ways, is a type of project that combines classic software constraints with real hardware constraints.
The typical need
Many businesses still run their takings through a physical system — a cash register, a payment terminal, locally installed point-of-sale software — while also building up an online presence. The typical need is to get these two worlds talking to each other: pushing an in-store sale up to a central system, sending an online order down to the till for preparation, or syncing stock shared between the two channels. These physical systems were often never designed to talk to an external web system in the first place.
How I approach this kind of need
The first step is always to understand what the till system or terminal actually allows: some expose a documented API or exchange protocol, others offer no programmable interface at all and need a different solution, such as a small locally installed program that bridges the till software and the outside world. This initial diagnosis heavily shapes the architecture chosen.
A constraint specific to this type of integration is reliability in a real-world environment: a till in a shop or restaurant doesn’t always have as stable a network connection as a server in a data centre. I systematically design fallback behaviour for temporary network outages, so a sale or an order never gets silently lost for lack of a connection at the critical moment.
Factors that affect the quote
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Whether the till exposes an API
A till system with a documented API makes integration far simpler than closed software with no programmable interface.
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Direction of the data flow needed
Pushing a sale upward is simpler than a full two-way flow that also includes sending orders down to the till.
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On-site network reliability
An environment with a reliable internet connection needs fewer fallback mechanisms than a site with frequent outages.
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Number of points of sale
A single till is handled differently from a network of several points of sale to be synced with the same central platform.
Frequently asked questions
Does the till software need replacing to integrate with a web platform?
What happens if the internet connection drops during a sale?
Does this integration work with a standard payment terminal?
How long does this kind of project take?
Describe your need in one minute
A few targeted questions so I can reply with an estimate rather than another questionnaire.