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c.
Instruction of RS-232 commands
a.) Examples of command format:
A: @00:VOL+$ Represents: Volume up
B: @00:NEXT$ Represents: Next file
C: @01:PREV$ Represents: Previous file (this command can
only be accepted by media player that set the address as “01”, all
other media players will not act on this command).
D: @00:03$ Represents: Play the files that stored in folder 03.
b.) RS-232 command consists of 5 parts, for example:
“@00:VOL+$”
A: “@”
：
Beginning sign of the command.
B: “00”
：
Address code.
There are 2 kinds of address code: broadcast address “00” and
user address “01-99”.
Broadcast address is the one that all the media players on the total
data can act on the commands sent out from broadcast address. If it
is user address, only defined media player can act on this command.
There is only one broadcast address “00”, and addresses range from
01 to 99 is user address. User address can be defined in the
“autoplay.txt”. For example, add “address=5” into “autoplay.txt”,
then the address of media player is “5”.
C:“:” This delimiter is placed after address code.
D:“VOL+” is command input, you can also use number input.
Number input: 0, 1, 2,…99(the numbers represent playing folder
0-99)
Command input: You can refer to the
command list
. For example:
STOP, NEXT, VOL+, VOL- …
E:“ $” is the end mark of command.
Note:
There is another command format, the beginning sign can be
“#”, and the end mark of command can be “0x0d(HEX)”. For
example: “#00:VOL+0x0d(HEX)”.
