1, install the driver of USB to serial cable matching on the computer;
2. Set the serial number after USB conversion on the computer. The operation is as follows:
My computer-control panel-system-hardware-device manager-port (com&; LPT) bafo USB to serial com port (comn) n = 1, 2, 3, 4, 5...- click properties-port settings-advanced (a)-COM port number (p): comn is changed to COM 1 or com2-OK-
3. Run communication software for data transmission.