The user can perform a "Connect" test to verify the hardware link.
Ensuring the tool is assigned to a port between COM1 and COM4, as older MStar ISP (In-System Programming) software often fails to recognize higher port numbers. Interaction with ISP Software mstar usb debug tool driver 31
Another process (like a virtual COM port driver) is holding the device. Solution: Close all other programming software (Arduino IDE, Putty, etc.). Restart the ISP Tool as Administrator. The user can perform a "Connect" test to
To install the MStar USB Debug Tool Driver 3.1: mstar usb debug tool driver 31
The driver alone is non-functional without the corresponding software suite. The most common pairing for Driver 31 is the . Once the driver establishes a handshake: