Specifications

UDM Hub Control Protocol
114
UDM-0404 4x4 Multi-Format Distribution Hub
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.
Device control codes are defined as follows:
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.
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 # 4 5
Byte value 2 IR Code
IR Code Description IR Code Description
0-9 Keys 0 to 9 57 Info
10 Channel up 58 Help
11 Channel down 59 Te le text
12 Power off 60 Services
13 Mute 61 Box office
14 Volume up 62 Interactive
15 Volume down 63 TV guide
16 Program up 64 Red
17 Program down 65 Green
18 10+ key (for two digit channel entry) 66 Blue
20 Channel restore (back) 67 Yellow
21 Power up 70 Play
22 Unmute 71 Pause
30 A/V select 1 72 Stop
31 A/V select 2 73 Record
32 A/V select 3 74 Fast forward
40 Device select (DVD/VCR) 75 Rewind
50 Menu 90 Custom 1 .. through to
51 Select Function 99 Custom 10
52 Cursor up 128 Select composite input
53 Cursor down 136 Select VGA input
54 Cursor left 144 Select S-Video input
55 Cursor right 152 Select Component (YPbPr) input
56 Esc
Byte # 4 5..n
Byte value 3 Serial string for onward transmission
Byte # 4 5 6 7
Byte value 4 Baud rate MSB Baud rate LSB DTR (0 for off)