NEX-Series
Video wall
www.gpodisplay.com
NEX-series Video wall
This document defines all the command and messages exchanged between the Master (a PC or the
other controller) and the Slave (the displays).
It also describes the ways to send or read the commands or the messages.
1. Protocol definition
SICP stands for “Serial Interface Communication Protocol”.
The protocol is specifically designed to allow data communication in half duplex multi-point
environments, but it can also be used for half duplex point-to-point RS-232C communication.
2. Communication characteristics
A half duplex communication is implemented starting from the concept of a master-slave structure,
where the display is the slave.
The first action is always taken by the master, which can be either a PC or any controlling device
(acting as server) interfaced to the monitor. After sending a command or a request in the
appropriate format the master receives from the slave an acknowledgement, which tells the
transmitter whether the command is not valid (or not executable, anyway) or it is accepted. In case
of a request, the requested information is sent back and it becomes the acknowledgement by itself.
3. How to connect external equipment
Female Pin number Male Pin number
2 <------------------------------------------------------> 2
3 <------------------------------------------------------> 3
5 <------------------------------------------------------> 5
4. Hardware Protocol
Baud rate : 9600 bps
Data bits : 8 bit
Parity bits : None
Stop bits : 1 bit
Handshake : None
SICP (Serial Interface Communication Protocol)
36
SICP program
*NOTE: For IP control/network configuration info, see p.g. 9-10.
