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  • PipPip
  • 22 posts
How do i know which COM port is COM1???
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  • Technician
  • 1,568 posts
Often it is marked on the back of the machine. If not, it seems that it is typical the one towards the top or left of the machine is com1.

One way is to try the setting and see if it works, if not try moving the device or using the other com port.
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