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The text to write needs to be passed as argument.
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## MQTT topics
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The MQTT topics for RFID reader are the following:
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```
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rfidReader/RfidReader_<ID>
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```
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containing the last read result of the RFID reader with the corresponding ID as the payload of a message. And
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```
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rfidReader/RfidReader_<ID>/<operation>
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```
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where the operation can be `read`, `write` or `loop`. These are used to read or write a single tag or starting a loop for reading every tag detected. For writing a tag, the text needs to be passed as message payload.
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