Category: <span>Programmers</span>

WCH ISP bootloader driver on Windows 11 (USB\VID_4348&PID_55E0): WCHISPStudio “Device Not Connected”, wchisp “No WCH ISP USB device found”, and the driver each tool needs

CH552, CH549, CH32V203/V307, CH582 and the other WCH chips with a factory USB bootloader all enumerate as 4348:55E0. WCH's WHQL CH375 driver vs WinUSB: what Device Manager shows, which driver WCHISPStudio, wchisp (release vs nightly), ch55xduino and chprog can open, and how to enter the bootloader family by family.