Specifications

206 Chapter 11 Inputs and Outputs
String Output Use a String Output to control devices that accepts text strings or other discrete
data packets through a serial or Ethernet port. For example, you can tell a
projector to power down by sending it a command through a serial port on its
display computer.
Using a Network Port When using a network port, you must know the IP number (or DNS name) and
port number of the device to be controlled. You must also specify a protocol
type. UDP is a rudimentary protocol used by many simple devices, while TCP
is more common on computer-based systems. When using the TCP protocol,
WATCHOUT will open the connection (if not already open), send the data
packet, and close the connection after about a minute of inactivity.
Select the kind of data port to use
on this menu.
For a network port, enter its IP
address and port number here.
Select the desired IP protocol.
The settings in this part of the
String Output dialog box are
specific for the kind of port
selected on the menu above.