Recently I got a ESS32-CAM card and it contains the same Ch340 chip and it has worked fine even with the USB cable so I suspect that the ch340 designer released an updated design of the chip that meets the USB timing specs or maybe some aspects of the board design are adjusted to help make the timings.īottom line, unless you enjoy chasing down problems you will be better off buying the more expensive ftdi or other non-Chinese designed chips. When I say I get it to work, all I have been able to do is install the wrap connector and get the adapter to talk to itself as verified with putty. This would also explain why sometimes it will work after installing into a different USB connector on the PC since those timings can vary as well. After connected my classic pretty blue usb/serial cable converter, I found out that, as usual, Windows couldn’t recognize it. Consequently if a chip designer is not careful about meeting USB timing specs then there will be situations when that chip will not work. USB to Serial converter HL-340: download 32 and 64 bit windows drivers (PID/VID 4348:5523) Due to some reasons I had to run Windows XP on Virtualbox. From my work experience I know that the USB timings are very critical in order to maximize performance. However, if I use an extension USB cable most of the time it fails to work. I say this because I have noticed that if I plug my Ch340 board directly into my USB port it works. Advanced Serial terminal capturing, controlling and debugging. The program can create a data flow, wrap it to data packets (RS232, TCP/IP or UDP) and send to a port. Next, it is apparent that the Ch340 design does not meet USB standards in the area of critical timings. Emulates a COM port or an Ethernet device, that generates a serial stream of data. After doing that I was able to solve the install failed problem. First thing to do is run/click the uninstall button. Since my last posting I have discovered some things that may help eliminate this problem. Have use a lot of different brands of USB-Serial-Adapters and some just don't work for certain things.Ch340 install problems. I would lean more towards #1 or #2 being the problem. I would uninstall the old driver first, reboot, then try this one. It would install and look fine, but would get consistent output to the serial device. I have had problems when the right driver was not installed.
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