Hi, Karsten Malcher: > i have the problem that i have nearly no serial communication > with a USB-Serial-Adapter type PL-2303 HX.
Is it working OK with other systems? Have you checked if it works under MS Windows with the latest driver? Maybe it's just a wiring / connection problem. BTW, is it a USB-to-TTL or a USB-to-RS232 adapter? (The latter have an additional level converter IC etc.) > When you use the check tool of profilic > the running chip is identified as PL-2303 H Chip. > The chip not running is a Pl-2303 XA / HXA. > Exact type is Pl-2303HX LF12313A or LF13313A Have you checked the chip markings? Counterfeit PL-2303 chips can often be found at the market, some even imitate the original branding, as stated on the official site: http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=155&pcid=41 ---- Best wishes, Bob
