I just started using this board, and I have problem at the beginning - I cannot connect the board to the computer. The SDA connector works fine, and the program pre-installed on the board (LED intensity changes by sliding the capacitor) also works. But it does not work when I connect the other USB to the computer. Instead of giving me a file disk named "BOOTLOADER", it shows nothing; and the device manager shows me an unrecognizable device "USB UART".
Does someone know what problem I have encountered? I spend almost two hours trying to figure out this seemingly simple problem. Thanks!