I have been using this product to interface to a microcontroller via the uart port.
Upon connecting the product to the computer via USB, it was recognised and installed successfully. However after a few minutes of operation and without connecting anything to it, it stopped functioning. It is no longer recognised when connected and I have tried 3 computers.
I requested some pinout information from the seller as the silkscreen legends do not match the pinout of the controller IC used. I never received a reply, despite the product page claiming that a schematic is available.
I am truly sorry about that. If you would like I can send you either a label to send me back the device for a complete replacement. It will not be refurbished back to you. I will send a new board alone with documentation. For some reason our doc. site has been shut down and all information is lost. I have to recreate all the information from scratch. Not only this product.