Default value for maximum measurement distance is 4m, since HC-SR04 sensor can't measure reliably beyond that. However, if you are using another sensor or if you you don't care about distances larger ...
An Arduino library for the ST25DV64KC Dynamic NFC/RFID Tag. With this library, you can: Write WiFi credentials to the tag using your smart phone and then have your Arduino board read them via I2C Log ...
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