Loader Gx6605s -

Open GXDownloader.exe. You will see a sparse interface.

Warning: You cannot use a standard USB-A to USB-A cable. The GX6605S uses UART (Universal Asynchronous Receiver-Transmitter) serial communication. loader gx6605s

You will need a USB to TTL Serial Converter (e.g., PL2303, CH340G, or FTDI). Open GXDownloader

Pinout for GX6605S boards: Most GX6605S receivers have a 4-pin header on the PCB labeled: Connection rule: Adapter TX → Receiver RX ;

Connection rule: Adapter TX → Receiver RX ; Adapter RX → Receiver TX ; GND → GND.