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The default that most devices use/accept is: Baud Rate - 9600 Data Bits - 8 Parity - None Stop Bits - 1 Com Port Pin Configuration: Use standard pin configuration. A configuration that allows direct connection to a PC via 9-pin straight through serial cable is best. Use of only 3 pins(Transmit, Receive, Ground)is best. 9 pin female D connector Pin 2 = Transmit Pin 3 = Receive Pin 5 = Ground RS-232 interface : Commands are to be sent to the unit via RS-232 using the following format: