How can i trigger a change on my device once another device scans a qrcode on my device in flutter

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I am new to flutter and I am trying to create two apps where one generates a qr code and the other scans the qr code. Generating or scanning is not my issue but I would love to trigger a state change in the generating app only when the scanning app successfully scans the the qr code on the generating app. Any ideas on how to achieve this on flutter?

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1 Answers

You could try to do that with a database... When the User scans a code, it sends a message to the database wich triggers the other app, wich is listening for a signal like that in the background. If you don't have a database, you can use Firebase, Firebase is very fast with something like that

But this solution has a disadvantage: It would only work online.

Hope you find a solution :)

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