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2 replies

DigitalMonk123
Visitor II
April 1, 2026

This error usually means the COM port is open but the board isn’t responding—ensure the correct COM port and baud rate are selected, and that the firmware on your STM32 is running with Motor Control UART enabled. Also check cable, drivers, and that no other software is using the same port.

GMA
Technical Moderator
April 1, 2026

Hello @dineshsharma2025,

Check also Baudrate speed (set to 115200 on your snapshot).
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If you agree with the answer, please accept it by clicking on 'Accept as solution'.Best regards.GMA