2
Communication
The MH10-ARC Intelligent Audio MediaHub has the default device ID 253. It can send and receive serial commands via
RS-485 at 57600 Baud, 8-N-1, and half-duplex; and via RS-232 at 115200 Baud, 8-N-1, and full-duplex. Both configuration
ports utilize a modular RJ45 jack with the following pinouts:
RS-485 Pinout:
RS-232 Pinout:
Pin
Function
Pin
Function
Pin
Function
Pin
Function
P1
Orange White (ground)
P5
Blue White (+12V power)
P1
Orange White (ground)
P5
not connected
P2
Orange (ground)
P6
Green (data B-)
P2
Orange (ground)
P6
Green White (RX/TX)
P3
Green White (data A+)
P7
Brown White (ground)
P3
Green White (TX/RX)
P7
Brown White (ground)
P4
Blue (+12V power)
P8
Brown (ground)
P4
not connected
P8
Brown (ground)
Command List:
Commands
Format
Response
REBOOT
[DEV=253;REBOOT]
RESET DEFAULTS
[DEV=253;RESET;DEFAULT]
BUTTON LED ON
[DEV=253;LED=#;ON]
BUTTON LED OFF
[DEV=253;LED=#;OFF]
BUTTON LED BLINK
[DEV=253;LED=#;BLNK]
BUTTON PRESS
(DEV=253;BTN=#;PRESS)
BUTTON RELEASE
(DEV=253;BTN=#;RELEASE)
CEC ENABLE
[DEV=253;HDMI=#;CEC=ON]
CEC DISABLE ALL
[DEV=253;HDMI=*;CEC=OFF]
CEC PRESENT QUERY
[DEV=253;CEC;DEV=#;PRESENT?]
(DEV=263;CEC;DEV=#;PRESENT=YES/NO)
CEC VOLUME QUERY
[DEV=253;CEC;DEV=#;VOLUME?]
(DEV=263;CEC;DEV=#;VOLUME=##)
CEC MUTE QUERY
[DEV=263;CEC;DEV=#;MUTE?]
(DEV=263;CEC;DEV=#;MUTE=YES/NO)
CEC SEND RAW
[DEV=253;CEC;SENDRAW=05:C3]
(
DEV=253;CEC;RECVDRAW=05:C0)
ARC AUDIO ENABLE
[DEV=253;HDMI=#;ARC=ON]
ARC AUDIO DISABLE ALL
[DEV=253;HDMI=*;ARC=OFF]
HDMI-ARC HPD ENABLE
[DEV=253;HDMI=#;HPD=ON]
HDMI-ARC HPD DISABLE
[DEV=253;HDMI=#;HPD=OFF]
APP VERSION
[DEV=253;APP;VERSION?]
(DEV=253;APP;VERSION=$)
BOOTLOADER VER
[DEV=253;BOOT;VERSION?]
(DEV=253;BOOT;VERSION=$)
CEC Communication
The MH10 series manages CEC (Consumer Electronics Control) communication between the BrightSign host and any
of the 10 HDMI outputs. The MediaHub employs a separate micro-controller to manage CEC and correct discrepencies
between the protocol of different connected devices.
HDMI-ARC
HDMI Audio Return Channels (ARC), controlled by the MH10-ARC, support from 2.0 up to 5.1 channel PCM. The number
of PCM channels is decided during programming. Control your presentation via the media microSD card. Content played
via PCM can be played in conjunction with embedded audio on the video output port.
