RS232 Command Line Interface
The RS232 interface provides a simple way to connect the MONITOR to PCs, modems
and other communications devices. Details on the
DB9 connector
are on page 5.
Microsoft Windows usually comes with a program called HyperTerminal. It can be
found by going to the Windows start menu, Programs, Accessories, Communications.
By default the RS232 interface operates at 115200 Baud, no parity, 8 data bits, 1 stop bit.
Monitor supports hardware handshaking; it’s use is recommended. Please see the setup
section for more on
Baud Rate
and
Hardware Flow Ctrl
.
The DTR line (pin 7 RS232) must be asserted for communication to work. Asserting
DTR wakes up the unit. Please allow at least half a second between asserting DTR and
starting communication (automatically done by HyperTerminal).
If connecting to a PC, use a standard DB9 serial cable. If connecting to a modem or a
logger, you are likely to need a null modem adapter.
To start command line mode, send carriage return or line feed (or both). If using
HyperTerminal or a similar program, simply press ENTER. MONITOR will respond
with a prompt >
Once in command line mode, type “HELP” to get a list of supported commands. Also try
“HELP SETUP”.
Changing the baud rate can be done via the front panel: Station Setup > Other Settings >
Baud Rate, or via the command line by typing “BAUD RATE”. The default baud rate is
115200.
With the terminal program, if the emulation is set for VT100, pressing the up arrow will
bring back the last typed command.
Status
To check the status, type “STATUS” (or just “S”).
>STATUS
Monitor: Monitor 1.00
Station Name = SUTRON
Recording = On
3 Meas Active
System Time 2008/06/04 09:56:33
Recording since 2008/06/04 09:56:30
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