The WCH website is in Chinese, but the software itself is multilingual. Once installed, click the “Language” menu to switch to English.
This specialized flashing utility connects a personal computer to the programming hardware, allowing students, engineers, and hobbyists to transition code from development environments like Keil C51 onto actual physical chips.
: You must install the appropriate USB-to-Serial drivers for your programmer hardware (usually PL2303 or CP2102 ) for the software to detect the device. COM Port Configuration :
Tip: The software works best if the COM port number is low (below 5). If it is high (e.g., COM10), right-click the device -> Properties -> Port Settings -> Advanced, and change the COM port to 1-4. Run WLPRO.exe as Administrator. Troubleshooting: Willar Software Not Working on Windows 10 willar programmer software for windows 10 link
: Since this software is older, if you encounter errors on Windows 10, try running the Compatibility Mode for Windows 7 and as an Administrator or do you need a hand setting up the for your hardware? 8051 | alselectro | Page 2 - WordPress.com
The is an essential utility tool used by hardware engineers, students, and hobbyists to flash compiled code onto microcontrollers. It serves as the primary desktop interface for classic USB microchip burners like the SP200S, SP200SE, and SP300 enhanced programmers . These programming kits are widely used to burn Intel HEX or binary files into MCS-51 architecture chips (such as the AT89S51 or AT89S52) and serial EEPROMs.
: Provides a task-focused UI with clear progress feedback and "Online Mode" indicators. Windows 10 Compatibility & Setup Tips The WCH website is in Chinese, but the
Monitor progress and view error logs during programming. The software uses the executable file named WLPRO.exe . Willar Programmer Software for Windows 10 Download Link
Last updated: February 2026 – Valid for Windows 10 versions 1809 through 22H2 and Windows 11 with driver signature off.
Choose the chip type from the dropdown menu (e.g., AT89S52). Click to select your .hex file. Click Program to burn the code. : You must install the appropriate USB-to-Serial drivers
The software often requires the assigned COM port to be between .
From this page, download the (typically named CH341PAR.EXE or CH341SER.EXE ). This package includes:
The software bridge coordinates directly with onboard USB communication chips to facilitate fast data burning. 8051 & EEPROM Programmer Guide | PDF | Usb - Scribd