USB Serial Device Com Number

To discover the COM number of your USB device once it has been installed and plugged in do the following.

  1. In Windows click the start button and choose 'Run..' 
  2. Type 'devmgmt.msc' to open device manager
  3. Expand Ports ( COM & LPT )

The Com port device shouild be listed as a

Silicon Labs CP210x USB to UART Bridge (COMx)

The COMx is the COM port number you need. For example COM4


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