Data Format

The message data format is 24 bytes fixed-size data including the header, commands, parameters and footer.

Byte Offset	Type	Byte Length	Value
0-1	Header	2	Byte[0] 0x2A [*]: (fixed value) Byte[1] 0x53 [S]: (fixed value)
2	Message Type	1	0x43 [C]: Control 0x45 [E]: Enquiry 0x41 [A]: Answer 0x4E [N]: Notify
3-6	Command	4
7-22	Parameters	16
23	Footer	1	0x0A [LF]: (fixed value)

Header

Each message always has the fixed header (0x2A 0x53), which identifies the beginning of the message.

Message Types

There are 4 message types.

Message Type	Value	Message Direction	Description
Control	0x43 [C]	Client to Display	Used to control or change values on the Display Answer message is used to reply
Enquiry	0x45 [E]	Client to Display	Used to control or change values on the Display Answer message is used to reply
Answer	0x41 [A]	Display to Client	Used to send a reply back to the client from the Display
Notify	0x4E [N]	Display to Client	Used to send an event to the client from the Display

Commands and Parameters

Each command is identified by four ASCII characters represented in Four-CC format, and has parameters. The details of commands and parameters are described in Simpe IP control Commands.

Footer

Each message always has the fixed footer (0x0A), which identifies the end of the message.