Wireless communication with ID-12LA RFID reader

You could expose the variables using Spark.variable() by polling repeatedly. The more elegant solution would be using Spark.publish() which allows you to push the ID as soon as it’s scanned, making it as real-time as possible.
Take a look at these topics to get a feeling on how to use either:

Let me know if that helped and/or you need additional help.
Good luck!

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