Ch341par.exe May 2026

C:\Program Files (x86)\CH341\CH341PAR\ch341par.exe

for _ in range(10): write_parallel(255) time.sleep(0.5) write_parallel(0) time.sleep(0.5) ch341par.exe is a simple but effective tool for low-speed parallel port control over USB. While limited compared to full CH341 DLL access, it’s perfect for quick testing, education, and basic automation scripts. ch341par.exe

WCH CH341 Download Page (look for CH341PAR utility) C:\Program Files (x86)\CH341\CH341PAR\ch341par

ch341par.exe -s 0x0D ; low ch341par.exe -s 0x0C ; high -r returns status byte. Busy is bit 7 (value 0x80). Invert logic (busy low = printer busy). it’s perfect for quick testing