09-20-2019 04:44 PM
I just fixed the issue.
It seems I have to set the port baud rate to 115200, no idea why this setting helps.
Thanks for all helps!!!
09-22-2019 08:23 AM
@ElliotYY wrote:
It seems I have to set the port baud rate to 115200, no idea why this setting helps.
Because the manual told you to?
Mostly likely, the internals of the device just use a USB-RS232 adapter chip that then sends the data to a microcontroller. So you need the baud rate to match the settings of the microcontroller.