Gpio Interface - Lightware MMX8x4-HT Series User Manual

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5. Device Concept
The concept
The System controller can send commands (input/output switching, control functions, etc.) to the matrix
and is able to remote control the HDTV via RS-232.
Settings
Matrix: The RS-232 interface of the TPS OUTPUT 1 (P4) is in Command Injection (CI) mode. Set the further
parameters (Baud rate, Data bits, etc.) in accordance with the specifications of the television.
All settings are available in the LDC software, see
TTL Serial
The 2-pole Phoenix connector can be both infra or serial output. For TTL data transmission the destination
port numbers are 8003 and 8004. No setting required for configuring the interface, it works automatically.
Logic low level
Logic high level
Serial Output Voltage Levels (TTL and RS-232)
*Using a receiver with at least 1k impedance to any voltage between 0V and 5V to get the voltages.
5.8. GPIO Interface

DIFFERENCE: The MMX8x4-HT420M and MMX8x8-HDMI-4K-A-USB20 models have GPIO connector.
The GPIO (General Purpose Input/Output) port is a multifunctional input/output interface to control the matrix
or third-party devices and peripherals. You can establish connection between the controller/ controllable
device and the matrix by the 8-pole Phoenix connector. Six pin's direction is configurable independently
based on needs of the application.
GPIO Options - Example
The Concept
Motorized curtain is pulled back by Relay box when signal received from the PC over the HDMI input. Relay box
is controlled by the GPIO port.
RS-232 Tab section.
TTL* RS-232
0 .. 0.25V 3 V .. 15 V
4.75 .. 5.0V -15 V .. -3 V
Applied firmware package: v1.2.2b5 | LDC software: v2.2.1
MMX8x4-HT series – User's Manual
Settings
Step 1. Create an event in Event manager: when signal is present on Input 5 (I5) then set GPIO pins to low
level for Relay box opening.
Step 2. Also create another event when signal is not present on Input 5 (I5) then set GPIO pins to high level
for Relay box closing.
When the PC starts to play the video presentation, the signal is received over the HDMI input so GPIO pins
send signal to Relay box to open which results pulling back the curtains.
When the presentation is ended, signal ceases on the HDMI input, so GPIO pins send signal to Relay box to
close which results drawing the curtains
ATTENTION! Please always check the electrical parameters of the devices what you want to control. The
maximum current of one GPIO pin is 30 mA, the maximum total current for the seven pins is 180 mA.
See the LDC settings for GPIO port in the
settings in the Event Manager
GPIO Tab section. See also the details about the Event Manager
section.
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