Hall Technologies HD-AUD-IO, User Manual, Page: 9 / 16

Hall Technologies October 6, 2023 Page 9 of 16
RS-232 commands
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The following table lists the available RS-232 commands:
- A single carriage return character (hex 0x0D) terminates each command.
- Invalid input, space and linefeed characters (hex 0x0A) are ignored.
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RS-232 communication on the RS-232 terminal strip is:
- 115200 bps, 8 Bit, No Parity, 1 Stop bit.
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<CR> symbols in the table below refer to a single carriage return character (0x0D)
•
“Invalid Command” is sent in response to invalid RS-232 commands.
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Other possible responses
- "ERR1" - Internal I2C error
- "ERR2" - TX HPD read error.
- "ERR3" - Chip Signature error
Command Response Function and Example
FW FWx.y<CR> Returns the firmware version.
FW1.1<CR> -- X and Y represent the firmware version numbers. (V1.1)
CVx CVx<CR> Sets/Returns the HDMI Output video status
CV?<CR> -- Returns the current HDMI Output video status
CV1<CR> -- Enable HDMI Output video
(Factory Default)
CV0<CR> -- Disable HDMI Output video is OFF
DI DIx<CR> Returns Digital Input Status
DI1<CR> -- Digital Input terminal is not grounded.
DI0<CR> -- Digital Input terminal is grounded.
DIAx DIAx<CR> Sets/Returns Digital Input Action
DIA?<CR> – Returns current Digital Input Action
DIA3<CR> -- HDMI Output Audio is muted when digital input is
grounded. (Factory Default)
Where 'x' is one of the following:
0
-- No Action
1
-- Mute HDMI Output Video and Audio
2
-- Mute HDMI Output Video
3
-- Mute HDMI Output Audio (Factory Default)
4
-- Mute Both External SPDIF and L/R Outputs
5
-- Mute External LR Output
6
-- Mute External SPDIF Output
7
– Mute HDMI TX Output
ESx ESx<CR> Sets/Returns the current EDID setting
ES?<CR> -- Returns the current EDID setting
ES1<CR>-- Pass-Thru EDID
(Factory Default)
ES0<CR> -- Emulated EDID
EL
EL OK<CR>
EL ERR<CR>
Learns the connected SINK to the selected EDID (LR or Multi)
EL OK<CR> -- The EDID learning process was completed EL
ERR<CR> -- The EDID learning process was not completed.
Failures can occur from:
No SINK attached
Attempting to learn while in EMULATED EDID mode
Attempting to learn while in AUDIO EDID Pass-Thru mode
FD FD<CR> Resets device to Factory Defaults Unit will
reboot