@Peggy Oh I think I know what your problem is: you have to press the 'boot' button for about 2s whilst the programmer is trying to establish communications with the ESP. After programming, you have to press the 'EN' button briefly

@Peggy I downloaded from github. The driver seems to work, you may have to change the settings in windows 10 to allow the driver to be installed.
https://github.com/Xinyuan-LilyGO/CH9102_Driver

Another 2 hrs later I still can't get these modules to work. Ahrrrrr

I spend a whole day already trying to understand and rectify this problem.
I did download the new USB driver (was difficult to find) CH9102. Still no luck. I bought 10 of these units. I hope I can use them 1 day !!!
Just trying a simple sample code of setting outputs high and low, nothing fancy.
Downloading it on a ESP32 DEVKITV1 worked first time !!!