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61 lines
2.1 KiB
Markdown
61 lines
2.1 KiB
Markdown
Application Note for RFID Transponder source code
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Overview
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This application demonstrates the integration of an ST25DV NFC/RFID Tag IC, an SD card module, and an Arduino-compatible microcontroller. It provides functionality for reading and writing data to the RFID tag, managing records on an SD card, and testing the system's integrated components such as LEDs and a piezo buzzer.
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Features
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RFID Tag Management:
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Write a record to the ST25DV RFID Tag IC.
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Clear the last RFID entry.
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Detect new records from the RFID tag and log them on the SD card.
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SD Card Integration:
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Store and retrieve records from a text file (records.txt).
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Check for duplicate records before saving.
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Clear all records on the SD card.
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System Testing:
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Test the onboard piezo buzzer with preprogrammed melodies.
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Test the LED with blink functionality.
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Command Interface:
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Interactive commands via Serial Monitor for managing RFID and SD card operations.
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Command Reference
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$printFile
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Prints all records stored on the SD card.
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$clearFile
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Clears all records in records.txt on the SD card.
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$clearRFID
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Writes a placeholder (!ignore) to the RFID tag to clear its last entry.
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$addRecord <record>
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Adds a new record to both the RFID tag and the SD card.
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$testBuzzer
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Plays a short melody on the piezo buzzer.
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$testLED
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Blinks the onboard LED to verify functionality.
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System Workflow
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Setup:
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Initializes the ST25DV RFID Tag IC and the SD card module.
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Displays a splash screen with available commands.
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Serial Commands:
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Waits for user input via Serial Monitor.
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Executes the corresponding command and provides feedback through Serial output and the buzzer/LED.
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RFID Reading:
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Continuously reads the URI stored on the RFID tag.
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If a new record is detected and is not a duplicate, logs it to the SD card.
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Data Logging:
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Uses the SD card to store a persistent record of RFID tag data.
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Ensures duplicate records are not logged to prevent redundancy.
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