CH9328 Uart go to USB-HID Converter Module None Driver Plug and Play Multiple Output Adjustable

Four modes are supported.

work mode	IO2 level	IO3 level	IO4 Level	Explain
mode0	1	1	1	This mode only supports converting the characters corresponding to visible ASI (e.g., a-z, 0-9, @, #, $, etc.) into standard key values. Special function: If the received serial data packet encounters 0x1B, it will be converted to return key.
mode1	1	0	1	This mode only supports converting the characters corresponding to visible ASI (e.g., a-z, 0-9, @, #, $, etc.) into standard key values.
mode2	1	1	0	This mode only supports converting the characters corresponding to visible ASI (e.g., a-z, 0-9, @, #, $, etc.) into standard key values. Special function: If the received serial data packet encounters 0x28, it will be converted to return key.
mode3	0	1	1	This mode is transparent transmission mode. It is not only used to transfer visible ASII code characters, but also can realize standard USB full keyboard function under this mode. Serial data consists of a data package every 8 bytes. The chip receives 8 bytes each time and uploads them directly through USB package. That is to say, the chip is in transparent transmission mode and will not analyze the data. Therefore, serial data need to be sent according to the data format of USB analog keyboard. For example, the mode key "A" serial port sends the data packet as "0x00 0x00 0x04 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00".