It seems like the issue may be with the configuration settings for the HAMs100 application on the laptop.
Here are a few troubleshooting steps you can try:
- Check if the serial to USB connector is working properly.
- Make sure the COM port settings in the application match the port number assigned by the computer.
- Try reinstalling the driver for the Prolific USB to Serial Comm Port.
If the issue persists, you may need to contact the support team for the HAMs100 application for further assistance.