NFC or near-field communication is a wireless technology that uses radio waves to exchange data between devices brought close together. It has a wide range of uses, including transit cards, contactless payments, and more. It is also used for pairing Bluetooth devices, home automation, and gaming.

You can use external NFC readers with standard NFC applications with the help of this app. Currently, this app supports MFRC522 via USB-UART adapters and
ACR122. It also supports common Mifare cards, including Ultralight, Classic, and Plus. This app is still under development, so more features and support will be added in the future.