LabVIEW
data acquisition
Doesn’t look like. The CH340G looks like a cheap chinese FTDI look alike that is typically used to convert an asynchronous serial port uart signal into an USB signal. It’s not directly obvious how this device could be used to interface to the SMBus interface on your sensor. So it’s not clear what commands you need to send to it to access the registers in your sensor. Without these commands being properly documented in the manual your chance to talk with a Klingon are better than getting this to work. 😀
One (pretty cumbersome) solution would be to attach a USB sniffer on the connection and analyze the data trafffic on fhe line. There are expensive hardware based ones and also some that you can install on your PC as software application only. The really good ones also cost quite some money. You still need to dive deep into the USB specification to understand what you see in these analyzers and which parts are relevant to use from VISA and which are part of the VCP protocol and are automatically taken care of by the VISA driver.
Another option would be to use a better documented protocol converter such as the NI-USB 8451. Stll this is not plug and play. You will need to sit down and dive into the 8451 documentation to learn how to use it and also read the datasheet for your sensor many times to understand which SMBus register addresses to tickle just in the right way and order to get it to give you the data you want.
