Troi Serial Plug-in functionality can be implemented by adding calls to its functions in the Specify Calculation dialog box in FileMaker Pro. 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 improved in v9.0!
Serial_Open improved in v9.0!
Serial_Receive
Serial_Reinitialize
Serial_Send
Serial_SetDirectInsert
Serial_SetDispatchScript
Serial_TextToAsciiValue
Serial_Version
Serial_VersionAutoUpdate
Script step reference
Beep for Serial Data
Close Serial Port
Open Serial Port improved in v9.0!
Receive Serial Data
Reinitialize Serial Plug-in
Send Serial Data
Set Serial Direct Insert improved in v9.0!
Set Serial Trigger Script
Suspend/Resume Serial Port
Trigger Serial Test Script