Set objFTPort = CreateObject("FTSPC.FTSPCControl") objFTPort.PortName = "COM1" objFTPort.BaudRate = 2400 objFTPort.DataBits = 8 objFTPort.StopBits = 0 '!!! <--- =0 - one stop bit, =1 - 1.5stop bits, 2 - two stop bits objFTPort.Parity = 0 objFTPort.FlowControl = 0 call objFTPort.Open() If objFTPort.IsOpened Then call objFTPort.WriteArray(arr, 5) '!!! Use "call" if you want to use "( )" End If