Connecting Smart-apps online

So i want to make a program that recognizes license plates and acts upon it. but i dont know how to connect smart apps to external devices, is there a way to say if it recognizes the license plate it will send a siginal to smartthings?

There are multiple ways to have an external system send data into the ST platform. You could apply for oAuth access or create an endpoint app. Learn more over at the developer portal

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