1. When first connect your VESC or VESC based controller to VESC_TOOL, it will install driver automatically, please make sure your computer is connected to internet.
2. After driver is installed, it will show the virtual port (COM18 in the video and screenshot) for this VESC or VESC based controller
3. Refresh your VESC_TOOl to get the correct port.
4. If the connection port is wrong, it won't connect.
Check video for detailed steps:
More reference: If my computer can not download driver automitically, how should I do? Please check following blog: