Troi Serial Plug-in functionality can be implemented by adding calls to its functions in the Specify Calculation dialog box in FileMaker Pro. Starting with FileMaker 16 you can also use its script steps in the Script Workspace.
Functions reference
Serial_AsciiValueToText
Serial_Close
Serial_Control
Serial_DataWasReceived
Serial_DelayMilliseconds
Serial_Debug
Serial_GetPortInfo
Serial_GetPortNames
Serial_GetUSBInfo new in v8.0!
Serial_Open
Serial_Receive
Serial_Reinitialize
Serial_Send
Serial_SetDirectInsert
Serial_SetDispatchScript
Serial_TextToAsciiValue
Serial_Version
Serial_VersionAutoUpdate