FSC-DB690 is a Bluetooth Low Energy (ব্লা) module testing board with a USB port, designed specifically for the FSC-BT690 BLE module. It offers users enhanced convenience and ease of testing compared to using the Bluetooth module alone. With the USB port, the board allows direct connection to a computer, saving time and ensuring stability during testing. When paired with Feasycom’s free UART tool, users have full control over the FSC-BT690 module using AT Commands, facilitating efficient development and testing processes.