The FSC-DB004-PIN development board is equipped with a comprehensive Arduino wireless serial port Bluetooth module hardware kit (HDK), specially designed for UART communication. It supports a variety of Bluetooth modules with the same appearance, such asFSC-BT826, FSC-BT836, FSC-BT616 andFSC-BT986wait. Compared with using Bluetooth modules alone, the FSC-DB004-PIN development board provides users with greater convenience and simplicity when testing products, saving time and ensuring the safety of the testing process.