Benq BH2801, BH3801, BH2401, BH3501, BH2801N RS232/LAN Control Protocol Installation Guide

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BH2801/BH3801/BH2401/BH3501/ BH2801N/BH3801N/BH3801D/ BH2401T/BH3501T RS232/LAN Control Protocol

Installation Guide

Table of Contents

Introduction ........................................................................................................................... 3

Wire arrangement ......................................................................................................................................................... 3

RS232 pin assignment ................................................................................................................................................... 3

Communication setting ...................................................................................................................................... 4

Command message reference ............................................................................................................................ 4

Connections and communication settings .............................................................................. 4

RS232 serial port connection ..................................................................................................................................... 4

RS232 via LAN ............................................................................................................................................................... 5

RS232 via HDBaseT ...................................................................................................................................................... 5

Protocol Command Description ............................................................................................. 5

Set-function listing ......................................................................................................................................................... 6

Set-function description ........................................................................................................................................................ 6

Set-function format ........................................................................................................................................... 6

Set-function table .............................................................................................................................................. 8

Get-function listing ...................................................................................................................................................... 12

Get-function description .................................................................................................................................................... 12

Get-function format ........................................................................................................................................ 13

PC Get-function command to LCD Monitor ................................................................................................. 21

Date: 2019/05/23

Introduction

This document describes the hardware interface spec and software protocols of RS232 interface

communication between Commercial Display and PC or other control unit with RS232 protocol. This set protocol allow users to assign the ID in the command to control the specify ID monitor. The set protocol contains two sections command: Set-Function and Get-Function

In this document, "PC" represents all the control units that can send or receive the RS232 protocol command.

Wire arrangement

Wire Arrangement

Color

P2 1 Black

1 2 Brown

Red

2 4 Orange

4 5 Yellow

5 6 Green

Blue

7 8 Purple

Gray

Case

Drain wire

Case

RS232 pin assignment

Description

RXD

TXD

GND

RTS

CTS

Use of crossover (null modem) cable requires use with PC.

Communication setting

Baud rate select: 9600bps (fixed)/ Data bits: 8 bits (fixed)

Parity: None (fixed)/ Stop Bits: 1(fixed)

Command message reference

PC sends to Monitor command packet followed by "CR". Every time PC sends control command to the

Monitor, the Monitor shall response as follows:

1. If the message is received correctly, it will send "+" (02Bh) followed by "CR" (00Dh).

2. If the message is received incorrectly, it will send "-" (02Dh) followed by "CR" (00Dh).

Connections and communication settings

Choose one of the connections and set up properly before RS232 control.

RS232 serial port connection

Communication cable (straight)

RS232 via LAN

Find the Wired LAN IP address of the connected display from the OSD menu and make sure the display and the computer are within the same network.

IP Protocol Port: 4660

RS232 via HDBaseT

Protocol Command Description

Item

Description

Length

Total Bytes of Message excluding "CR"

Display ID

Identification for each of display

Command Type

Identify command type, "s"

(0x73h): Set Command

"g" (0x67h): Get Command

"r" (0x72h): Reply Command

"+" (0x2Bh): Valid command Reply "-" (0x2Dh): Invalid command Reply

Command

Function command code: One byte ASCII code

Value [1~3]

Three bytes ASCII that defines the value

D-Sub 9 pin

PC or laptop

LAN cable

RJ45 port on a display

HDBaseT compatible device

D-Sub 9 pin

RJ45

RJ45 port on a display

LAN cable

PC or laptop

0x0D

Set-function listing

The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to control the LCD monitor behavior in a remote sit through the RS232 port. The Set-Function packet format consists of 11 bytes.

Set-function description

Item

Description

Length

Total Bytes of Message excluding "CR"

Display ID

Identification for each of display display ID is “01” for LAN control

Command Type

Identify command type, "s"

(0x73h): Set Command

Command

Function command code: One byte ASCII code

Value [1~3]

Three bytes ASCII that defines the value

0x0D

Set-function format

Send: (Command Type="s")

Name

Length

Command

type

Command

Value1

Value2

Value3

Byte count

1 Byte

2 Byte

1 Byte

Bytes

order

2~3 4 5 6 7 8 9

Reply: (Command Type="+" or "-")

Name

Length

Command

type

Byte count

1 Byte

2 Byte

1 Byte

Bytes

order

2~3 4 5

Example 1: Set Brightness as 76 for Display -02 and this command is valid.

Send (Hex Format)

Name

Length

Command

type

Command

Value1

Value2

Value3

Hex

0x38

0x30 0x32

0x73

0x24

0x30

0x37

0x36

0x0D

Reply (Hex Format)

Name

Length

Command

type

Hex

0x34

0x30 0x31

0x2B

0x0D

Example 2: Set Brightness as 176 for Display -02 and this command is NOT valid.

Send (Hex Format)

Name

Length

Command

type

Command

Value1

Value2

Value3

Hex

0x38

0x30 0x32

0x73

0x24

0x31

0x37

0x36

0x0D

Reply (Hex Format)

Name

Length

Command

type

Hex

0x34

0x30 0x31

0x2D

0x0D

Example 3: Set Tint as 32 for Display -03 and this command is valid.

Send (Hex Format)

Name

Length

Command

type

Command

Value1

Value2

Value3

Hex

0x38

0x30 0x33

0x73

0x27

0x30

0x33

0x32

0x0D

Reply (Hex Format)

Name

Length

Command

type

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