How To Find The Port Assignment For ECcom Software

How to find the serial port number without using the Device Manager


  1. First connect the USB to Serial dongle to your compute

  1. Type “CMD” in your search window.
  2. A Command prompt should appear.
  3. Type in the following “reg query HKLM\HARDWARE\DEVICEMAP\SERIALCOMM” and hit enter 

  1. The serial port is on ProlificSerial1   Com 8
  2. So in our ECcom software under Setup go to “Comm port” “Settings” 

  1. Click on “EIA-232” and type in the com number you got from the above Command prompt “ (in this example, com eight)  Hit enter and your should be connected.  

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