The MLT-BT05 is a readily available, inexpensive Bluetooth 4.0 module based on the Texas Instruments CC2541 Bluetooth Low Energy (BLE) system-on-chip (SoC), sold by various Chinese suppliers and ...
For starters, you need a pre-wired NFC RFID module as the key hardware. NFC and RFID projects have become a huge trend, but many modules are pricey for electronics hobbyists and need a complex setup.