If ProgISP is unstable on your system:
Inside the software, go to and select the COM port number assigned to your CH340 device (e.g., COM3, COM5). Set Baud Rate to default (often 115200 or 9600).
: The standard software for this programmer is WLPRO (also known as Willar Programmer).
A modern, universal programming software that supports dozens of programmers, including SP200S. It has a superior UI and auto-detects devices.
(for clone programmers)
If ProgISP is unstable on your system:
Inside the software, go to and select the COM port number assigned to your CH340 device (e.g., COM3, COM5). Set Baud Rate to default (often 115200 or 9600).
: The standard software for this programmer is WLPRO (also known as Willar Programmer).
A modern, universal programming software that supports dozens of programmers, including SP200S. It has a superior UI and auto-detects devices.
(for clone programmers)
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