NFC čítačka — USB HID emulátor klávesnice

Hardware device based on Arduino Leonardo + PN532 NFC module, used during participant accreditation at the Letavy summer arts camp as a contactless reader for NFC chip wristbands (ISO14443A/Mifare). When a wristband is tapped, the device reads the chip's serial number and "types" it directly into the active field of the web application via USB HID keyboard emulation — no manual transcription needed. The device appears to the computer as a standard USB keyboard and requires no drivers or software installation. Firmware is written in C++ for Arduino and communicates with the PN532 over UART (HSU mode).