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EXTERNAL SHOW CONTROLLER CONFIGURATION
41
Protocol
The serial protocol is 9600 baud, 8 data bits, no parity, 1 stop
bit. There is no flow control. Each command to the iPlayer 3
consists of five characters. The first character is always
X
. The
next two characters are the ASCII representation of a
hexadecimal command byte. The last two characters are a
hexadecimal data byte. The hexadecimal alpha characters are
uppercase (
0
-
9
,
A
-
F
).
Replies from the iPlayer 3 are also in this format but begin with
Y
instead of
X
.
Characters are not echoed by the iPlayer 3 when they are
received.
Illegal characters or badly formatted packets are ignored with
no error indication.
iPlayer 3 Commands
Note: dd is used below to represent a hexadecimal byte.
X00dd
Set Mode. Sets the current operating mode to dd.
Not currently used.
X0100
Lights Off. Turns all lights off.
X02dd
Set Absolute Intensity. Sets the global brightness level to dd (
00
= Off,
FF
= full On).
X03dd
Set Relative Intensity. Raises or lowers the global brightness
level by dd (dd is 2’s complement, so
02
increases by 2,
FE
decreases by 2). Brightness is pegged between
0
and
255
.