The hardware configuration settings for Notification Center are in the DEFAULT.DeviceActions.XML file. The file is in this folder:
C:\ProgramData\Hexagon\Notification Center\DeviceAndAction
The following section appears at the end of the file:
<Name>Lights</Name>
<Description>Lights</Description>
<Active>true</Active>
<SerialBaud>9600</SerialBaud>
<SerialParity>None</SerialParity>
<SerialHandshake>None</SerialHandshake>
<SerialStopBit>One</SerialStopBit>
<SerialDataBits>8</SerialDataBits>
<LightType>Auto</LightType>
<SerialPort>Auto</SerialPort>
By default, the serial port is set to Auto. This setting should be the correct one. If you need to change it, do this:
Open DEFAULT.DeviceActions.XML in a text editor.
Set the serial port to the specific port of the light controller (such as COM5).