Table of Contents
Advertisement
UDM Hub Control Protocol
Send IR Command To Connected Device
Sends a control command out through the IR blaster or serial port connected to the remote receiver. This is
translated in the receiver to the appropriate control protocol previously selected. The receiver must already be
loaded with the right driver for the codes used, and the device being controlled must allow the necessary
actions.
Byte #
Byte value
Device control codes are defined as follows:
IR Code
0-9
10
11
12
13
14
15
16
17
18
20
21
22
30
31
32
40
50
51
52
53
54
55
56
Send Non-specific Serial Command
Sends a serial string to the serial output (if present) on the remote receiver. This allows direct control of the
serial output (independent of the device protocol loaded in the receiver).
It is preferred that serial control be accomplished by loading the appropriate driver file into a receiver and
using the generic control commands (this allows the same command to be issued to a variety of different
devices, for example), but this command can be used for more direct control if required.
Byte #
Byte value
Set Serial Parameters
Sets serial port parameters for the serial interface (if present) on the Rx. DTR may be controlled by the value in
offset 7 - a non zero value will assert it.
Baud rate values are split into most significant byte (MSB) and least significant byte (LSB), so for example:
9600 baud has MSB = 37 and LSB= 128 since 9600 = 37x256 + 128
If the baud rate in this command is zero (both MSB and LSB), then the baud rate of the remote device will
remain unchanged.
Byte #
Byte value
114
4
5
2
IR Code
Description
Keys 0 to 9
Channel up
Channel down
Power off
Mute
Volume up
Volume down
Program up
Program down
10+ key (for two digit channel entry)
Channel restore (back)
Power up
Unmute
A/V select 1
A/V select 2
A/V select 3
Device select (DVD/VCR)
Menu
Select Function
Cursor up
Cursor down
Cursor left
Cursor right
Esc
4
5..n
3 Serial string for onward transmission
4
5
4
Baud rate MSB
Baud rate LSB
IR Code
Description
57
Info
58
Help
59
Teletext
60
Services
61
Box office
62
Interactive
63
TV guide
64
Red
65
Green
66
Blue
67
Yellow
70
Play
71
Pause
72
Stop
73
Record
74
Fast forward
75
Rewind
90
Custom 1 .. through to
99
Custom 10
128
Select composite input
136
Select VGA input
144
Select S-Video input
152
Select Component (YPbPr) input
6
7
DTR (0 for off)
UDM-0404 4x4 Multi-Format Distribution Hub
Advertisement
Table of Contents
