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14
RS-232 Protocol
Applies to Current Models:
• 10.5 TV Mirror
• 19.5 TV Mirror
• 27.5 TV Mirror
• 19.5 Hydra
• 27.5 Hydra
Settings Table
Baud Rate 115200 bps
Data Length 8 bits
Parity Bit None
Stop Bit 1 bit
Flow Control None
Start Bits 1
Stop Bits 1
Basic Format for Control:
The Transmission of data from the Controller (Computer or A/V Controller) starts with an STX [0x02] signal, followed by the command,
then the parameters, and lastly an ETX [0x03] signal. If there are no parameters, then the parameter does not need to be sent. A colon
separates the commands from the parameters.
All Commands start with STX [0x02] and end with ETX [0x03]. Any data not contained between the STX and ETX commands will be ignored
by the TV. STX and ETX must be sent as hex commands; all other data must be sent as ASCII characters.
NOTE: The brackets [ ] in the rest of this document do not get sent or returned in the command/query. They are there to indicate
characters to be sent in hex.
All responses from the TV to Queries start with STX [0x02] and end with ETX [0x03]. Any data not contained between the STX and
ETX commands must be ignored by the controller. STX and ETX must be sent as hex commands; all other data must be sent as ASCII
characters.
Contact Séura Technical Support for instructions on accessing the Service Menu at 800-957-3872 or techsupport@seura.com
• Each command is a string of ASCII characters plus a Parameter.
• A colon separates the Command from the Parameter.
• The Parameter is 1 to 5 ASCII characters long.
• After each command is received, the TV shall send back an acknowledgment.
• For most commands, this will be a simple STX[0x02] , the ASCII letters “OK”, and an ETX[0x03]
• If there is an error, the TV shall return STX [0x02], the ASCII letters “ER”, and ETX [0x03]. There may be parameters added after a
colon if more details are possible.
• If a command is sent to a TV that does not support this command, i.e. a tuner command for a monitor, the set shall return STX
[0x02], the ASCII letters “INVALID” or “ERR” and ETX [0x03].
NOTE: AMX programmers may need to add 100ms delays between parameters in commands.
Examples:
All commands are ASCII, except STX and ETX, which must be sent in hex. NOTE: The brackets [ ] in the rest of this document do not get
sent or returned in the command/query. They are there to indicate characters to be sent in hexadecimal form.
Example of a Power ON for Unit 001:
COMMAND: [0x02]001;PWD:1[0x03]
TV Returns: [0x02]OK[0x03]
Example of a Power ON with No Unit Number:
COMMAND: [0x02]PWD:1[0x03]
TV Returns: [0x02]OK[0x03]