Quantity   Component name
1 × arduino-leonardo AVR with 32+ code space, I2C,, SPI, UART, and some DIO
1 × SD-Card Shield Access file and log file
1 × Grove-Relay Output to grant access
1 × Grove-125Khz RFID Reader Uart based key entry
1 × Grove LCD-RGB Backlight display UI
1 × Grove Base Shield Easy connection.
1 × Sailfish Firmware P-Stop functionality.