You guessed it, no marking on the IC and not working reliably. I made sure the listing image showed the Prolific logo and type on the IC and went ahead and ordered another two. Again refunded in full by the seller after I complained. Looking at the IC it has no markings on it. I wanted to get an extra couple but these had similar issue like above. A couple of year back I purchased two USB PL2303HX to TTL converters. Still have them, might be useful for the cables one-day. I managed to have eBay refund me for all 10 pieces. On further investigation they don't even use RS232 level signals and only TTL but with the correct logic. All these had problems under Linux (Windows?) where they just stop working and the you have to reset them. Tue 9:09 pm LOL, fake PL2303 chips as well now.Ī few years ago I purchased 10 x USB-RS232 Prolific IC serial cables to supply with a product I was selling. The main problem is of course Windows, which does not provide a easy way to load the built in USB to Serial device driver which has been part of Windows for many years. But the cost of those is about 5 x as much as a CH340g adaptor. ( and also do USB to SPI and USB to I2C) and the firmware binary was posted to another thread. There are STM32f103 boards that emulate the CH340g USB to Serial adaptors. I womder how cheap a product has to be, so that its not worth cloning. Btw, this is the driver in my Win7 which works nice. There is only one or two chips supported with Win10, afaik. People say the Win7 and 10 recognize a fake PL2303 and do not allow to install it, or, it switch them off after a while. Update your computer's drivers using DriverMax, the free driver update tool - Ports - Prolific - Prolific USB-to-Serial Comm Port Computer Driver Updates Home Download. Not with all three, one disconnects after some time (~hour). After messing with several drivers in past it works now (I think the latest driver has been installed automatically, but not sure). I've got 3 prolifics (those blue dongles, PL2303TA inside) and had problems even with Win7.
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