Campbell Scientific SC-IRDA CSL CS I/O to Infrared Interface - Manual (Page 11)

SC-IRDA Infra-red Communications Interface
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data collection for dataloggers that support speeds higher than 9600 baud such
as the CR23X and CR5000 dataloggers.
To use these speeds a simple ASCII string needs to be sent to the SC-IRDA
before any communication is attempted with the datalogger. These strings and
their function are shown in the table below.
String Action
SETUP=0 1200baud SDC with ME fall back
SETUP=1 9600baud SDC with ME fall back
SETUP=2 19200baud SDC with ME fall back
SETUP=3 1200baud ME connect only
SETUP=4 9600baud ME connect only
SETUP=5 19200baud ME connect only
The first three options are the most commonly used where the SC-IRDA will
attempt to connect as an SDC device and then fall-back to attempt connection
as a ME (modem enabled device). Options 3 to 5 are only likely to be used if
another SDC device is used at the same time.
To send the string, PC208W and LoggerNet require you to add a generic
modem between the COM port and the datalogger in the network map. A
command is then entered in the dial string for the generic modem as shown
below:
D5000T"SETUP=2"
D5000 instructs the program to wait 5000 milliseconds after opening the serial
port before transmitting the string that is entered in quotes (T).
4.4 CSOS Datalogger Operating System Download Utility
With care, the SC-IRDA interface can be used as a communications method for
upgrading the operating system in a datalogger. This will only work with the
CR23X datalogger if the current operating system in the datalogger post-dates
January 2003.
To ensure success, only attempt this process if you have no hard wire
alternative and can ensure a stable and reliable IR link throughout the
download process. For example, ensure that your PC batteries have sufficient
power and the PC is not moved for the duration of the upload.