Appendix D Managing SMARTBoard MX series displays using RS-232
smarttech.com/kb/171555 108
Notes
l
The display won’t respond to RS-232 commands when it is in a low power state (soft off). Disable
Power saving mode to prevent the display from entering a low power state. See
Power saving
mode
on page91.
l
When you first turn on the display, the RS-232 connector operates in a special diagnostics mode
instead of control mode, and the display won’t respond to control commands. In addition, the
connected control system or terminal emulation program might receive unexpected data
characters.
Program a connected control system to ignore the unexpected data characters and only send
commands after it receives the command prompt (>).
If you haven’t disabled Power saving mode, you’ll see the unexpected characters every time you
turn on the display.
Correct
>set input=HDMI1
Incorrect
>set HDMI1
To use the room control system to get information about the display or to adjust display settings, send
commands after receiving a command prompt (>), and then wait for the display’s response before
sending another command.
Correct
>get volume
volume=55
>
If you send a command that the room control system doesn’t recognize, you receive an invalid
command response.
The example contains an extra space in the volume command.
Incorrect
>set vol ume=65
invalid cmd=set vol ume=65
>
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