Velodyne Acoustics SMS -1 Appendix a RS-232 Serial Overview and Commands, T r o d u c t i o n

Appendix A: RS-232 Serial Overview and Commands

I n t r o d u c t i o n

This document outlines Velodyne’s Digital Drive (DD) RS-232 protocol specification. This protocol indicates how Digital Drive products receive run-time commands from devices such as Creston Universal Remote Controls.

Com Por t Setup

Use standard communications settings: Baud Rate: 9600, Data Bits: 7, Parity: None, Stop Bits:1

DD IN and OUT Por t Pin Configuration

DDserial ports use a standard configuration that allows direct connection to a PC via a FEMALE to MALE serial cable. It uses only 3 pins (Transmit, Receive, Ground).

The pin configurations are:

IN: Pin 2 = Transmit

Pin 3 = Receive

Pin 5 = Ground

OUT: Pin 2 = Receive

Pin 3 = Transmit

Pin 5 = Ground

Runtime Command Format

Byte Number	Byte Description	Notes
0	‘#’	Header Character
1 to 3 or 4	Command and	3 to 4 ASCII characters see formats below
	Parameter Data	Case sensitive - CAPS ONLY!
4 or 5	‘$’	Termination Character (required or
		command is ignored)

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