Sollae Systems CSE-H20 User Manual

Sollae Systems Co., Ltd.

http://www.sollae.co.kr

Serial Device Server

CSE-H20 User's Manual

Version 1.8

2009-07-13

CSE-H20 User's Manual Ver. 1.8

Sollae Systems Co., Ltd. - 1 - http://www.sollae.co.kr

To all residents of the European Union

Important environmental information about this product

This symbol on this unit or the package indicates that disposal of this unit after its

lifecycle could harm the environment. Do not dispose of the unit as unsorted

municipal waste; it should be brought to a specialized company for recycling. It is your

responsibility to return this unit to your local recycling service. Respect your local

environmental regulation. If in doubt, contact your local waste disposal authorities.

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Contents

CONTENTS ........................................................................................................................................... - 2 -

1 OVERVIEW................................................................................................................................ - 5 -

1.1 Overview ................................................................................................................................................................ - 5 -

2 SPECIFICATIONS ..................................................................................................................... - 6 -

2.1 Components ......................................................................................................................................................... - 6 -

2.2 Specifications ....................................................................................................................................................... - 6 -

2.3 Interface.................................................................................................................................................................. - 7 -

2.3.1 Serial Ports (RJ45) .................................................................................................................................. - 7 -

2.3.2 Ethernet Interface .................................................................................................................................. - 9 -

2.3.3 Power ........................................................................................................................................................... - 9 -

2.3.4 System LEDs .......................................................................................................................................... - 10 -

2.3.5 ISP Switch ............................................................................................................................................... - 10 -

3 INSTALLATION AND TEST RUN ........................................................................................ - 11 -

3.1 Installation Method ........................................................................................................................................ - 11 -

3.1.1 Checking the Communication Environment .......................................................................... - 11 -

3.1.2 Connecting to the Network ........................................................................................................... - 11 -

3.1.3 Configuring the Environmental Variables ............................................................................... - 12 -

3.2 Test Run .............................................................................................................................................................. - 12 -

3.2.1 Changing PC IP Address ................................................................................................................. - 12 -

3.2.2 Installing CSE-H20 .............................................................................................................................. - 12 -

3.2.3 Configuring CSE-H20 ........................................................................................................................ - 12 -

3.2.4 Communication Test ......................................................................................................................... - 13 -

4 CONFIGURING IP ADDRESS VARIABLES ......................................................................... - 16 -

4.1 IP Address and Environmental Variables ............................................................................................. - 16 -

4.2 Configuring with ezManager ..................................................................................................................... - 16 -

4.2.1 ezManager ............................................................................................................................................. - 16 -

4.2.2 Buttons of ezManager ...................................................................................................................... - 17 -

4.2.3 Parameters of ezManager............................................................................................................... - 17 -

4.2.4 Matters to be attended to ............................................................................................................. - 18 -

4.3 AT command ..................................................................................................................................................... - 18 -

4.4 IP Address Related Categories Settings via DHCP ......................................................................... - 18 -

4.5 IP Address settings via PPPoE .................................................................................................................. - 19 -

4.6 Notify IP Change ............................................................................................................................................. - 19 -

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4.6.1 DDNS (Dynamic Domain Name System) ................................................................................. - 19 -

4.6.2 TCP/UDP.................................................................................................................................................. - 19 -

5 OPERATION MODE.............................................................................................................. - 20 -

5.1 Operation Mode Overview ......................................................................................................................... - 20 -

5.1.1 Overview ................................................................................................................................................. - 20 -

5.2 How to Initiate Each Operation Mode ................................................................................................. - 20 -

5.2.1 How to Initiate the Normal Mode .............................................................................................. - 20 -

5.2.2 How to Initiate the Serial Configuration Mode .................................................................... - 20 -

5.2.3 How to Initiate the ISP Mode ....................................................................................................... - 20 -

5.2.4 Comparison of Operation Modes ............................................................................................... - 20 -

5.3 Normal Communication Mode ................................................................................................................ - 21 -

5.4 Serial Configuration Mode ......................................................................................................................... - 21 -

5.5 ISP Mode ............................................................................................................................................................ - 21 -

5.5.1 Upgrading Firmware .......................................................................................................................... - 21 -

6 NORMAL COMMUNICATION MODE ............................................................................... - 23 -

6.1 T2S – TCP Server ............................................................................................................................................. - 23 -

6.1.1 TCP Connection ................................................................................................................................... - 23 -

6.1.2 Serial Data before the TCP Connection ................................................................................... - 23 -

6.1.3 Data Transmission .............................................................................................................................. - 23 -

6.1.4 Disconnection ....................................................................................................................................... - 24 -

6.2 COD – TCP Client ............................................................................................................................................ - 25 -

6.2.1 Serial Data before the TCP Connection ................................................................................... - 25 -

6.2.2 Data Transmission .............................................................................................................................. - 25 -

6.2.3 Disconnection ....................................................................................................................................... - 25 -

6.2.4 DNS ........................................................................................................................................................... - 26 -

6.3 ATC ........................................................................................................................................................................ - 27 -

6.4 U2S ........................................................................................................................................................................ - 28 -

7 ATC MODE ............................................................................................................................ - 29 -

7.1 Overview ............................................................................................................................................................. - 29 -

7.1.1 AT command format ......................................................................................................................... - 29 -

7.2 Basic AT Command Set (Example: ATA, ATD etc.) .......................................................................... - 29 -

7.3 Extended AT Commands (Example: AT+PLIP etc.) .......................................................................... - 30 -

7.4 Online State and AT Command State ................................................................................................... - 30 -

7.4.1 Changing Online State to AT Command State .................................................................... - 31 -

7.4.2 Changing AT Command State to Online State .................................................................... - 31 -

7.5 Example of Configuration with AT Command .................................................................................. - 31 -

7.6 Example of TCP Connection ...................................................................................................................... - 31 -

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7.6.1 Example of Active Connection ..................................................................................................... - 32 -

7.6.2 Example of Active Connection with host name ................................................................... - 32 -

7.6.3 Example of passive Connection ................................................................................................... - 32 -

7.7 Example of TCP Disconnection ................................................................................................................ - 33 -

7.7.1 Example of active disconnection ................................................................................................. - 33 -

7.7.2 Example of passive disconnection .............................................................................................. - 33 -

8 SECURITY PROTOCOLS & OPTION .................................................................................. - 34 -

8.1 SSL ......................................................................................................................................................................... - 34 -

8.1.1 SSL (Secure Socket Layer) ............................................................................................................... - 34 -

8.1.2 How to set the SSL on CSE-H20 ................................................................................................. - 34 -

8.1.3 Restriction ............................................................................................................................................... - 35 -

8.2 SSH ........................................................................................................................................................................ - 35 -

8.2.1 SSH (Secure Shell) .............................................................................................................................. - 35 -

8.2.2 How to set the SSH on CSE-H20 ................................................................................................ - 35 -

8.2.3 Restriction ............................................................................................................................................... - 36 -

8.3 ezTCP Firewall ................................................................................................................................................... - 36 -

9 CHECKING & DEBUGGING ................................................................................................. - 38 -

9.1 Telnet .................................................................................................................................................................... - 38 -

9.1.1 Telnet Login ........................................................................................................................................... - 38 -

9.1.2 Commands ............................................................................................................................................. - 38 -

9.2 Status on ezManager .................................................................................................................................... - 40 -

9.2.1 Status of the CSE-H20 ...................................................................................................................... - 40 -

9.2.2 Closing TCP connection by the ezManager ........................................................................... - 40 -

9.3 Remote Debugging ....................................................................................................................................... - 41 -

10 TECHNICAL SUPPORT, WARRANTY, AND NOTES ON OPERATION .......................... - 42 -

10.1 Technical Support ........................................................................................................................................... - 42 -

10.2 Warranty .............................................................................................................................................................. - 42 -

10.2.1 Refund ................................................................................................................................................... - 42 -

10.2.2 Free Repair Services ........................................................................................................................ - 42 -

10.2.3 Charged Repair Services ............................................................................................................... - 42 -

10.2.4 Notes on Operation ........................................................................................................................ - 42 -

11 REVISION HISTORY ............................................................................................................. - 44 -

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1 Overview

1.1 Overview

Along with the development of the Internet, the demand for data communication

functions has increased recently. Data communication over the Internet requires using

TCP/IP, the Internet communication protocol. That is to say, in order to connect a system

to the Internet, TCP/IP protocol must be implemented. It is possible to implement TCP/IP

by directly implementing the protocol, porting public TCP/IP, or using Operating System

(OS). However, all these methods impose burdens on the developer in time, cost, and

technology.

ezTCP series, a Serial ↔ TCP/IP protocol converter product group of Sollae Systems,

enables you to use TCP/IP communication (the Internet communication) function simply by

“connecting the cable to a serial port”. ezTCP sends data from the serial port to the

Internet network after TCP/IP processing, and vice versa.

CSE-H20 in ezTCP product group is a product that provides TCP/IP communication

through Ethernet. In other words, like other ezTCP products, CSE-H20 sends data from the

serial port to the LAN after TCP/IP processing and vice versa.

As CSE-H20 has 2 RS232 ports, it can be connected to two RS232 devices in the same

time. And it is easy CSE0-H20 to attach to user systems because of its compact size.

It provides DHCP and PPPoE functions, so that it can be applied to the cable network

and the xDSL network. And it has DDNS (Dynamic DNS) function, so it can be used more

easily in the internet.

It also provides debugging function, so user can solve the problem with ours.

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2 Specifications

2.1 Components

 CSE-H20 Body
 5V Power Adopter (Option)
 RS232C cable for PC connection - RJ45-DB9F-1M (Option)
 RS232C cable for user device connection - RJ45-DB9M-1M (Option)
 Cross-over Ethernet cable (Option)
 DIN rail adopter (Option)

2.2 Specifications

Power

Input Voltage 5V (±10%)

Current 200mA typical

Dimension 87mm x 57mm x 24mm

Weight About 70g

Interface

Serial RJ45 x 2

Network 10/100 Base T (RJ45)

Serial Port 2 x RS232 (1200bps ~ 230400bps, RTS/CTS flow control)

Network

Ethernet 10/100 M bit auto-sense

Auto MDI/MDIX

Protocols

TCP, UDP, IP, ICMP, ARP, DHCP, PPPoE

DNS lookup, Dynamic DNS(DDNS)

Telnet COM Port Control Option (RFC2217)

SSL, SSH

Diagnostic Online Debugging Function

RoHS RoHS Compliant

Approvals

CE: F690501/SP-EMC000979

FCC: STK-07-EMCG0122

MIC: SLS-CSE-H20

Communicat

ion Mode

T2S TCP Server Mode

COD TCP Client Mode

ATC

TCP Server/Client

(AT command emulation)

U2S UDP

Utilities ezManager Configuration utility via LAN

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ezterm Socket test utility

hotflash Firmware download utility via TFTP

ezVSP Serial-TCP/IP virtual driver for Windows

2.3 Interface

2.3.1 Serial Ports (RJ45)

COM1 COM2

 RS-232

number name

description level Dir. Etc.

1 RTS Request To Send RS232 Output Optional

2 DTR Data Terminal Ready RS232 Output Optional

3 TXD

Transmit Data RS232 Output Mandatory

4 GND

Ground Ground

- Mandatory

5 GND

Ground Ground

- Mandatory

6 RXD

Receive Data RS232 Input Mandatory

7 DSR

Data Set Ready RS232 Input Optional

8 CTS

Clear To Send RS232 Input Optional

 LEDs of Serial Port

Condition Color Operation

TCP

disconnected

Green

OFF

Yellow

TCP

connected

Green

As same as CTS (on: CTS active)

Blinks if CSE-H20 gets data from the serial port.

Yellow As same as RTS(on: RTS active)

Pin #1

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Blinks if CSE-H20 sends data to the serial port.

UDP Mode

Green

As same as CTS (on: CTS active)

Blinks if CSE-H20 gets data from the serial port.

Yellow

As same as RTS(on: RTS active)

Blinks if CSE-H20 sends data to the serial port.

 Data bits, Parity, and Stop bit

Item Configurable Value

Data bit 8, 7, 6, 5

Parity None, Even, Odd, Mark, Space

Stop bit 1, 1.5, 2

 Flow Control

CSE-H20 support RTS/CTS Hardware Flow Control.

 Telnet COM Port Control Option

CSE-H20 has Telnet COM Port Control Option function that is specified by RFC2217. If

the Telnet COM Port Control Option is enabled, CSE-H20 sends the CTS, DSR control signal

to the communication counterpart, and CSE-H20 sets its serial port items (RTS, DTR, Baud

rate, data bits, parity, stop bit) after getting information from the communication

counterpart.

 TX Delay

CSE-H20 has a function that delays its serial data for the user’s slow device. User can set

the interval between byte and byte which are outputting from CSE-H20’s serial ports. Its

unit is byte.

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Ver.

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2.3.2

Ethernet Interface

Network part of CSE-

H20

connect UTP cable. The Ethernet part detects 10Mbit or 100Mbit Ethernet automatically, to

connect the corresponding cable

cable or cross-

over cable

Each piece of Ethernet equipment has unique hardware addresses, and

factory-

set hardware address (which is called MAC address).

2.3.3 Power

DC 5V is used for CSE

-

#1

1.8

- 9 -

is configured with Ethernet. So, what you have to do is only to

. It also provides auto MDI/MDIX function to detect 1:1

automatically.

10/100Base-T DC 5V

H20 and the specification is below:

http://www.sollae.co.kr

CSE-H20 also has

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2.3.4 System LEDs

CSE-H20 has 5 system LEDs.

 System LEDs

Mode Name Color LED Status Description

Common

PWR Red ON Power is supplied.

LINK

Green

ON Connected to 100M Ethernet.

Red ON Connected to 10M Ethernet.

RXD Yellow

Blinking There are data on the LAN

TXD Green

Blinking

Packets are being transmitted

to Ethernet

Normal

mode

STS Yellow

Blinks in

every second

IP is allocated but TCP

connection is not established.

Blinks 4

Times/sec

Dynamic IP is not allocated.

ISP

mode

STS Yellow

OFF CSE-H20 is in the ISP mode

Serial

Configuration

mode

RXD/

TXD/

STS

-

Blink 2 Times/sec

at one time

CSE-H20 is in the Serial

Configuration mode

2.3.5 ISP Switch

There is an ISP switch on the side. If this switch is push 20ms~1s, it operates as Serial

Configuration Mode. If this switch is push over 1 second, CSE-H20 operates as ISP mode.

User can do firmware download to the CSE-H20 in the ISP mode. Please refer to 4.2 for

more information on firmware download.

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3 Installation and Test Run

3.1 Installation Method

You can install CSE-H20 in the following steps.

Title Item Sub-item

1.

Checking the

communication

environment

Check items

IP address environment

Serial port settings

Application program to be used

2.

Connecting to the

network

Check method Check if LINK LED is ON.

3.

Configuring the

environmental variables

Configuration

method

Set by ezManager, a utility program for

configuration through the network.

Set by AT commands in ATC mode

Configuration

items

IP address related items

Serial port related items

Communication mode (depending on

application program)

4. Application to the field

3.1.1 Checking the Communication Environment

Before installing CSE-H20, check the network environment where CSE-H20 is to be

installed, including the followings matters:

 IP address environment (local IP, subnet mask, gateway, DHCP/PPPoE etc.)
 Serial port type of the equipment to which CSE-H20 is going to be connected

(RS232)

 Serial port items of the equipment to which CSE-H20 is going to be connected

(baud rate, data bit, parity, stop bit, flow control)

 Application program protocol to be used (TCP/UDP, server/client, etc.)
 Security function (SSL, SSH, etc.)

3.1.2 Connecting to the Network

Connect power to CSE-H20, and connect CSE-H20 either directly to the Ethernet port of

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the PC where test is to be performed or to the network (hub) to which the PC is connected.

3.1.3 Configuring the Environmental Variables

When network connection is completed, configure the environmental variables such as IP

address related items, serial port related items, and communication mode related items

through the LAN using “ezManager” the environmental variable configuration program.

3.2 Test Run

You can perform test run according to the following orders. The test run described here

is based on the assumption that the IP address of the PC is set to 10.1.0.2

3.2.1 Changing PC IP Address

You can change the IP address of your PC as follows:

IP Address 10.1.0.2

Subnet Mask 255.0.0.0

Gateway IP Address

-

3.2.2 Installing CSE-H20

Connect the supplied RS232 cable (RJ45-DB9F-1M) between your PC and CSE-H20, the

LAN cable to the hub to which the PC is connected or directly to the PC, and the supplied

CSE-H20 power adapter to CSE-H20 for power supply. If the LAN cable has been correctly

connected when power is supplied, LINK LED turns on.

3.2.3 Configuring CSE-H20

Configure CSE-H20 setting using ezManager, the ezTCP configuration program, as

follows.

Run ezManager, and click [Search All] button in the ezManager window. And, ezManager

program will search all CSE-H20s on the local network.

When ezTCP is searched, MAC address of the ezTCP is displayed on the [Search Result]

window (The MAC address is indicated at the bottom of the product case).

Select the corresponding MAC address, and set the variables considering your network

environment.

When no ezTCP is found, check the Windows firewall. If you press [Windows Firewall]

button in the ezManager, you can see the Windows Firewall menu directly.

For simple test, we recommend that the variables keep default values as shown in the

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below table.

Parameter Value

Network

Local IP Address 10.1.0.1

Subnet Mask 255.0.0.0

Option

Telnet Enabled

IP Address Search Enabled

Serial Port

(COM1/2)

Serial Type RS232

Baud Rate 19200bps

Parity NONE

Data Bits 8

Stop Bit 1

Flow NONE

Communication Mode

T2S – TCP Server

Local Port 1470/1471

3.2.4 Communication Test

Power the CSE-H20 off and on, then it tries to connect to the LAN.

 A program for testing starts if you press the [Simple Test] button of the ezManager.

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 Press the [Connect] button after inputting 10.1.0.1 and 1470 in the IP and Port. If

the TCP connection is established there will be “Connected [ 10.1.0.1 : 1470 ]. And the

STS indicator will be on.

 Press the [Open] button after selecting serial port that is connected to the CSE-H20.

If the serial port is open, the “COM1 the COM port has opened” message will be shown.

 If you press the [Send Data] button on the LAN part (Top), the data shown in the

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[Send] box will be transmitted to the [Receive] box on the RS232 part (Bottom).

 If you press the [Send Data] button on the RS232 part (Bottom), the data shown in

the [Send] box will be transmitted to the [Receive] box on the LAN part.

 If the transmitting and receiving data are same, the communication test is

successful.

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4

Configuring IP Address Variables

4.1 IP Address and Environmental Variables

For TCP/IP communication, you must set IP address related items. In addition, you have

to set serial port related items (serial port type, communication speed, data bit length,

parity bit, flow control, etc) to CSE-H20.

You can set the IP address and the serial port related items by using ezManager, the

supplied configuration utility which allows you to configure your CSE-H20 over the network,

or by using AT commands in ATC mode.

4.2 Configuring with ezManager

4.2.1 ezManager

The basic environmental variables (IP address related items, serial port items, and etc.)

can be set by ezManager which is an integrated management tool for Windows.

ezManager is operated in Microsoft Windows(Windows 98, 98 SE, 2000 Pro, ME, XP

Pro/Home, Vista). Following is the screen shot of ezManager which is just launched.

ezManager communicates UDP broadcast and its UDP ports are 50005 and 50006. Port

number 50005 is for setting and port number 50006 is for debugging. If you use any

firewall function, the ports have to be opened.

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4.2.2 Buttons of ezManager

Button Description

Read Read the values configured through MAC or IP address.

Write Store the changed values of parameters

Set Password Set or remove the password by this button.

Status Check the status of ezTCP in real time.

Factory Reset Initialize all the values as a default.

Debugging Message Make the ezTCP broadcast debugging messages.

Change F/W / HTML Change the firmware or HTML files with this button.

Export Variables Store a set of values as a file.

Import Variables Load values from a file made from [Export Variables]

Multi Write Configure a set of values to one or more ezTCP

PING/ARP Test the PING reply and manage the ARP table.

Simple Test Run the test program interfaced with Network and RS232 port.

Windows Firewall Run the windows firewall set window.

Exit Exit ezManager

4.2.3 Parameters of ezManager

Tap Section Parameters

Network

Network

Local IP Address, Subnet Mask,

Gateway IP, DNS IP Address

Notify IP Change

Protocol, Interval, Port, Data Type, DDNS ID, DDNS

Password, Host Name(dyndns/custom)

Option

Obtain an IP From The First Received Packet,

Obtain an IP Automatically (DHCP),

Obtain an IP Automatically (PPPoE),

PPPoE ID, PPPoE Password,

Obtain DNS Server Address Automatically

Option

Option

Telnet, IP Address Search, Send MAC Address,

Debugging Message, SSL, SSH,

Multiple Connection

ezTCP Firewall

Allowed MAC Address, Allowed IP Range,

IP Address, Network Mask,

Apply To ezManager

Serial Port Serial Port

Serial Type, TTL, Baud Rate, Parity, Data Bits, Stop

Bit, Flow Control, DTR/DSR, TX Interval

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TCP/IP

Communication Mode, Peer Address,

Peer Port, Local Port, Event Byte, Timeout,

Data Frame

4.2.4 Matters to be attended to

ezManager can be used when you want to change your device’s environment variables.

In case of CSE-H20, two interfaces are supported and those are Ethernet and RS232 port.

 Using Ethernet Port

For use ezManager through Ethernet, CSE-H20 should be connected with PC on networks.

If they are located at the same network, [Search All], on the [MAC] tap, could be used with

MAC address. If they are connected on Internet, [Read], on the [IP] tap, could be used.

 Using RS232 Port

For use ezManager through RS232, not only the CSE-H20 should be connected to PC

with RS232 cross cable but also has to be operated as serial configuration mode.

4.3 AT command

In ATC mode, the user can set environment variables through the serial port using AT

command.



For more information, See “7. ATC Mode”.

4.4 IP Address Related Categories Settings via DHCP

In the network environment composing DHCP server, settings related to CSE-H20’s IP

address, subnet mask, gateway, and name servers can be automatically designated using

DHCP protocol. In order to do so, user must check [Obtain an IP Automatically (DHCP)]

category on ezManager. Depending on DHCP server type, [Obtain an IP from the First

Received Packet] category should also be checked as well.

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4.5 IP Address settings via PPPoE

PPPoE is used in most ADSL and VDSL. To use PPPoE function, PPPoE function should be

enabled and PPPoE ID and PPPoE password should be configured. The local IP address of

CSE-H20 is assigned automatically in PPPoE environment.



Some ADSL or VDSL environment uses DHCP based on the modem type. Please contact

your internet service provider for further information.

4.6 Notify IP Change

In internet environment, most host get IP addresses dynamically. In this case, it is very

hard to communicate to the host because the IP address is changed dynamically. The IP

Change Trap service solves this problem. There are 3 types- DDNS, TCP and UDP- for this

service.

4.6.1 DDNS (Dynamic Domain Name System)

If the CSE-H20 obtains its IP address, it notices to the service provider. Then the service

provider serves DNS service. So, even though user doesn’t know the CSE-H20’s IP address,

user can connect to the CSE-H20 by the host name (after DNS looking up.) The DDNS

service provider that the CSE-H20 supports is only Dyndns (http://www.dyndns.com)

currently.

4.6.2 TCP/UDP

In addition, CSE-H20 can transmit some information to user’s TCP/UDP servers each

period which is set. This information is IP address, MAC address, product ID, firmware

version, and comment. The data can be sent as either ASCII or Hexadecimal type.



For more details about the Notify IP Change, please refer to the document on our web site.



For more details about the ezManager, please refer to the manual of ezManager on our

web site.

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5

Operation Mode

5.1

Operation Mode Overview

5.1.1 Overview

CSE-H20 can operate in one of three modes (normal, serial configuration, and ISP

modes). Normal mode is ordinary data communication mode; and serial configuration

mode is a configuration mode through the serial port; and ISP mode is used to download

CSE-H20 firmware through the Ethernet port.

5.2 How to Initiate Each Operation Mode

5.2.1 How to Initiate the Normal Mode

Normal mode is a mode in which CSE-H20 performs its original functions.



For more information, see “6. Normal Communication Mode.”

5.2.2 How to Initiate the Serial Configuration Mode

Pressing the ISP button for the time between 20ms and 1000ms (1sec), CSE-H20 works in

the serial configuration mode.

5.2.3 How to Initiate the ISP Mode

If user press the ISP button hen CSE-H20 boots up or user press the button over 1

second in the normal mode, it operates as ISP mode that is firmware download mode.

5.2.4 Comparison of Operation Modes

The following table is the comparison of the above described operation modes.

Mode How to Initiate

Description

Serial Port

Communication Speed

Normal

ISP- pin open

Or

Pull-up

Normal data

communication mode

T2S, ATC, COD, U2S

User setting

Serial

Configuration

Pressing the ISP

button for

20ms ~ 1000ms

Configuring the

environmental variables

through the serial

port.(COM1)

115200bps,N,8,1

Using the COM1 port

ISP

Pressing the ISP

button when it

boots up or

Download firmware

through the Ethernet port

Disabled all security

115200bps,N,8,1

Using the COM1 port

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pressing over 1

second.

functions

5.3 Normal Communication Mode

Normal communication mode is suitable for the purpose of using CSE-H20.

Normal communication mode can be classified into four modes – T2S, ATC, COD, and

U2S – each of which is described in the following table.

Communi

cation

Mode

Protocol Connection

Need for User

Equipment

Software

Modification

Configuration of

Environmental

Variables through

Serial Port

Topology

T2S TCP

Passive

Connection

Not needed Impossible 1:1

ATC TCP

Active/Passive

Connection

Needed Possible 1:1

COD TCP

Active

Connection

Not needed Impossible 1:1

U2S UDP

No

Connection

Not needed Impossible N:M

TCP protocol requires connection process. The connection is always established as 1:1

connection. At this time, the host waiting for connection (passive connection) is called a

server and the one attempting to connect (active connection) is called a client.

On the other hand, UDP communicates by block unit without connection process. As

UDP does not require connection, numbers of hosts can communicate at the same time.

5.4 Serial Configuration Mode

This mode is for configuration under condition which the network is unavailable. When

entering this mode, parameters of CSE-H20 can be set by its COM1 port. [Serial] tap on the

ezManager let users do this.

5.5 ISP Mode

5.5.1 Upgrading Firmware

In ISP mode, you can download a firmware (CSE-H20 operation software) provided by

our company. There is another thing in this mode. If you forget your password set before,

you can reset it by entering this mode. In ISP mode, all the security options including

ezTCP firewall are removal.

The following is the firmware downloading procedure.

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 Supply power with pressing ISP button or push the button over 1 second, then

CSE-H20 operates in the ISP mode.

 Run hotflash that is supplied by us and input IP address of CSE-H20 and select the

firmware with the [FILE] menu. Then, send it with [SEND] button. (Uncheck the [Verify

firmware version] option.)

 When the downloading is completed, CSE-H20 automatically reboots and enters

normal mode.



Firmware download can be implemented with ezManager whose version is 3.0A or

subsequent version.

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6 Normal Communication Mode

6.1 T2S – TCP Server

In T2S mode, the CSE-H20 functions as a server.

When a host connects to predefined local port, the CSE-H20 accepts a TCP

connection. When the ezTCP accepts TCP connection, then the TCP connection is

established. After connection is established, TCP/IP processing is performed on the data

coming to the serial port, which is then transmitted to the remote host. And the TCP/IP

data coming from the remote host is TCP/IP-processed and transmitted to the serial port

to establish data communication.

6.1.1 TCP Connection

If a host connects to the pre-defined [Local Port] of CSE-H20, the host can communicate

bi-directionally.

6.1.2 Serial Data before the TCP Connection

The received serial data before the TCP connection is established will be handled based

on the [Event Byte] settings. If the [Event Byte] is 0, the data that comes to serial port of

CSE-H20 will not be recognized. If it is not 0, the serial data before TCP connection will be

temporarily saved to be sent to the host after the connection.

6.1.3 Data Transmission

When the TCP connection is established, the data communication in between the host

and the serial device will be established. Then, CSE-H20 will send data according to the

[Data Frame]. In other words, when the data comes through CSE-H20’s serial port, it will be

temporarily saved in the buffer. Then, when there is no incoming data during the

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designated [Data Frame], CSE-H20 will send the saved data. If the [Data Frame] is 0, CSE-

H20 will send serial port’s data immediately. The unit used for the [Data Frame] is 10m

seconds, so CSE-H20 rounds down rest of the values.

6.1.4 Disconnection

When the connected host terminates the connection, or there is no data communication

during the designated [Timeout], the TCP connection will be automatically terminated. The

unit used for [Timeout] is 1 second.

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Ver.

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6.2 COD –

TCP Client

In COD mode, the ezTCP functi

When data of the pre

attempts a TCP connection to the TCP port [

Address].

If the remote host accepts the TCP connection, TCP connec

established.

Data coming to the serial port after connection establishment is TCP/IP

processed and transmitted to the remote host.

TCP/IP-

processed and transmitted to the serial port for data communic

6.2.1

Serial Data before the TCP Connection

Data before TCP connection will be handled based on the [Event Byte] settings. If the

[Event Byte] is 0, the data that comes to

not 0, the serial data

before TCP connection will be temporarily saved to be sent to the

host after the connection.

6.2.2

Data Transmission

When the TCP connection is established, the data communication in between the host

and the serial device will be established. Then,

[Data Frame]. In other words, when the data comes through

temporarily saved in the buffer. Then, when there is no incoming data during the

designated [Data Frame],

H20

will send serial port’s data immediately. The unit used for the [Data Frame] is 10

milliseconds, so CSE-

H20

6.2.3

Disconnection

When the connected host terminates the connection, or there is n

during the designated [Timeout], the TCP connection will be automatically terminated. The

1.8

- 25 -

ons as a client.

-specified size [Event Byte]

comes to the serial port, the ezTCP

Peer Port

] of the preset host IP [

And, data coming from the remote host is

ation.

CSE-H20

’s serial port will not be recognized. If it is

CSE-H20 will

send data according to the

CSE-H20

’s serial port, it will be

CSE-H20 will send the saved dat

a. If the [Data Frame] is 0,

rounds down rest of the values.

o data communication

http://www.sollae.co.kr

Peer IP

tion will be

-

CSE-

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unit used for [Timeout] is 1 second.

6.2.4 DNS

If users set the host name instead of the IP address on the [Peer Address] box, CSE-H20

query the IP address of the host to its Domain Name Server (DNS). The IP address of DNS

can be configured on ezManager. If you set incorrect address on that box, the connection

won’t be established.

CSE-H20 User's Manual

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6.3 ATC –

AT Command

In ATC mode, the user can control the

modem using AT command.

server and the client can be configured.

In ATC mode, the AT command allows the user to set environment variables including

the IP address and

control TCP connection and disconnection.



For d

etailed information on AT commands

1.8

- 27 -

CSE-H20 in a sim

ilar way to controlling the

In ATC mode, only a TCP connection is possible and both the

, please refer to the “

7. ATC mode

http://www.sollae.co.kr

”.

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6.4 U2S – UDP

U2S is a mode that performs UDP communication.

In UDP communication, data is sent in block units. Therefore, data that comes through

CSE-H20’s serial port must be classified in block units to send it elsewhere. The block unit

classification process is performed as the following.

When the amount of received data via CSE-H20 serial port is as same as previously

designated data Event Byte, [Event Byte], or the duration of the data exceeds [Data Frame],

the incoming data will be recognized as one block. This block will be sent to UDP. [Timeout]

is in 10ms.

Since UDP communication does not involve establishing connection, N: M

communication may be performed using broadcast. Therefore, it can be conveniently in

changing RS 485 multi drop type network to Ethernet.

In addition, if the [Peer Address] and [Peer Port] are set to 0, U2S echo functions will be

applied. This option allows it to send UDP packets according to the source IP address in

the last packet which is received. By using this, CSE-H20 can send multiple hosts one by

one. This function is available on 1.2H or subsequently released firmware version.

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7 ATC Mode

7.1 Overview

CSE-H20 can be controlled by AT commands in ATC mode. For example, the peer host IP

address can be set by AT+PRIP command and connect to the host by ATD command.

Therefore, CSE-H20 communicates several hosts alternatively.

And also, it provides passive connection function by ATA command.

7.1.1 AT command format

AT commands start with AT, and end <CR>.

AT command format is followed.

AT Command <CR>(0x0d)

The response code to AT command is followed.

<CR>(0x0d) <LF>(0x0a) Response message <CR>(0x0d) <LF>(0x0a)

Response Message

When ATV1 (initial setting) When ATV0

Description

OK 0 command OK

CONNECT 1 TCP connected

NO CARRIER 3 TCP disconnected

ERROR 4 Command error

Set value Set value

When query set value

(example: AT+PRIIP?)

7.2 Basic AT Command Set (Example: ATA, ATD etc.)

Command

Function Description

A passive connection Listen connection (host → CSE-H20 connection)

D active connection Connecting to host form CSE-H20

E echo Echo (E0 – no echo, E1-echo)

H off-hook disconnection

I Info

Output CSE-H20 related-information

ATI3: the firmware version

ATI7: MAC address

O Online To online mode

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V enable result code Result code (numeric-V0, alphabetic-V1)

Z reset Reset

7.3 Extended AT Commands (Example: AT+PLIP etc.)

Command

Function Description

+PLIP local IP address

Needed AT+PWP after setting

this parameter

+PSM subnet mask

+PGIP default router

+PLP listening TCP port

+PTO timeout

+PRIP Remote machine IP address

+PNIP Name Server IP address Setting the name server IP

+PRHN Remote host name

Setting the peer host name to

connect with double quotation.

(at+prhn=”www.sollae.co.kr”)

After setting this parameter,

CSE-H20 queries the IP address

according to the name, and set

the IP address to the +PRIP

parameter.

+PRP Remote machine TCP port

+PWP Write configuration Saving and Reset

+PARP ARP setting function enable/disable ON: 1, OFF: 0

+PDC DHCP enable/disable ON: 1, OFF: 0

+PSE

“+++” data transmission enable/disable

when turn to AC command state

ON: 1, OFF: 0

7.4 Online State and AT Command State

It is AT command mode during disconnected. AT commands can be used in AT

command mode. After TCP connection (Online Mode), AT commands cannot be used. To

use AT commands during the connection, change state to AT command state.

AT Command State

During TCP disconnected, AT commands can be used

To use AT commands during the connection, required escape

sequence

Online State

During TCP connected, all serial data to CSE-H20 convert TCP

and send to Ethernet

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7.4.1 Changing Online State to AT Command State

To change online state to AT command state during the connection(Online State), +++

string should be transmitted to CSE-H20 as following time interval.

When transmitting +++ string to CSE-H20, +++ string will be sent to peer host.

The time from final data the first ‘+’ data

of ‘+++’ string

No data over 500ms(guard time)

time intervals between ‘+’s 0~500ms

Time interval after receiving last ‘+’ No data over 500ms (guard time)



In case of 1.3A or subsequent versions of F/W, users can select whether “+++” data is

transmitted or not by using AT+PSE command.

7.4.2 Changing AT Command State to Online State

If CSE-H20’s state is in AT command state during TCP connection, CSE-H20’s state can be

changed into online state by an ATO command.

7.5 Example of Configuration with AT Command

Serial Port Description

AT+PLIP=192.168.1.200<CR> ▶

Setting LOCAL IP address

◀

<CR><LF>OK<CR><LF> Command OK

AT+PGIP=192.168.1.254<CR> ▶

Setting GATEWAY IP address

◀

<CR><LF>OK<CR><LF> Command OK

AT+PSM=255.255.255.0<CR> ▶

Setting SUBNET MASK

◀

<CR><LF>OK<CR><LF> Command OK

AT+PLP=1470<CR> ▶

Setting LOCAL PORT

◀

<CR><LF>OK<CR><LF> Command OK

AT+PTO=10<CR> ▶

Setting TIME OUT

◀

<CR><LF>OK<CR><LF> Command OK

AT+PWP<CR> ▶

Saving setting value to EEPROM

Reset automatically

◀

<CR><LF>OK<CR><LF> Command OK

◀

<CR><LF>NO

CARRIER<CR><LF>

System Reset

7.6 Example of TCP Connection

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7.6.1 Example of Active Connection

Serial Port Description

AT+PRIP=192.168.1.201<CR> ▶

Setting remote IP address to connect

◀

<CR><LF>OK<CR><LF> Command OK

AT+PRP=1470<CR> ▶

Setting remote port number to connect

◀

<CR><LF>OK<CR><LF> Command OK

ATDT<CR> ▶

Connecting to the host

Attempting to connect to the host

◀ <CR><LF>CONNECT<CR><LF> TCP connection success

Data Communication

7.6.2 Example of Active Connection with host name

Serial Port Description

AT+PNIP=168.126.63.1<CR> ▶

Setting the name server’s IP address to

connect

◀

<CR><LF>OK<CR><LF> Command OK

AT+PRHN=”www.sollae.co.kr”<CR> ▶

Setting the host name to connect

After this command, CSE-H20 query the

host name to the name server.

After getting the IP address, it sets to the

+PRIP parameter.

◀

<CR><LF>OK<CR><LF> Command OK

AT+PRP=1470<CR> ▶ Setting remote port number to connect

◀

<CR><LF>OK<CR><LF> Command OK

ATDT<CR> ▶

Connecting to the host

Attempting to connect to the host

◀ <CR><LF>CONNECT<CR><LF> TCP connection success

Data Communication



When being established the active TCP connection, the [Local] Port number may be

changed to temporary values.

7.6.3 Example of passive Connection

Serial Port Description

AT+PLP=1470<CR> ▶

Set LOCAL PORT to listen

◀

<CR><LF>OK<CR><LF> Command OK

ATA<CR> ▶

Passive connection command

Listen on local port from a host

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A host connects to CSE-H20

◀ <CR><LF>CONNECT<CR><LF> TCP connection OK

Data Communication

7.7 Example of TCP Disconnection

7.7.1 Example of active disconnection

CSE-H20 disconnects the connection.

Serial Port Description

Data Communication(during TCP connection)

[Data Frame]+++[Data Frame] ▶ Changing online state to AT command state

◀

<CR><LF>OK<CR><LF> Changed to AT command state

ATH<CR> ▶

TCP disconnection command

◀

<CR><LF>OK<CR><LF> Command OK

7.7.2 Example of passive disconnection

The remote host disconnects the connection.

Serial Port Description

Data Communication(during TCP connection)

The remote host disconnect the connection

◀

<CR><LF>NO

CARRIER<CR><LF>

TCP disconnected

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8 Security Protocols & Option

8.1 SSL

8.1.1 SSL (Secure Socket Layer)

SSL is cryptographic protocol that provides secure communication on the Internet. The

SSL works over TCP.

8.1.2 How to set the SSL on CSE-H20

To works for SSL, you have to set the SSL-related parameters as the following steps.

 Set the [SSL] check box in the ezManager.

 Log in the CSE-H20 with telnet client.
 Generate an RSA key with a command. CSE-H20 supports 512, 768, and 1024

length keys.

Command Format: rsa keygen [key length]

 Make a certificate with a ‘cert new’ command. The certificate is a self signed.

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 Save the parameters for SSL with a ‘ssl save aa55cc33’ command.

8.1.3 Restriction

To use the SSL with CSE-H20, there is a restriction. You can use only one serial port

(COM1) if you set the SSL function.

8.2 SSH

8.2.1 SSH (Secure Shell)

SSH is a network protocol that allows secure communications between two devices. You

can use this function if your device is a serial port for console and you need secure

communication.

8.2.2 How to set the SSH on CSE-H20

To works for SSL, you have to set the SSH-related parameters as the following steps.

 Set the [SSH] check box in the ezManager.

 Log in the CSE-H20 with telnet client.
 Generate an RSA key with a command. CSE-H20 supports 512, 768, and 1024

length keys.

Command Format: rsa keygen [key length]

 Generate a DSA key with a ‘dsa keygen’.

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 Set a username and a password to log in with a ‘ssh id’ command for the SSH.

 Save the parameters for SSH with a ‘ssh save aa55cc33’ command.

8.2.3 Restriction

To use the SSH function with CSE-H20, there is a restriction. You can use only T2S mode

(TCP Server mode) if you set the SSH function

8.3 ezTCP Firewall

CSE-H20 has two connection limitation functions. Those can be set by the [Option] tab of

the ezManager.

 Allowed MAC Address

If user sets the [Allowed MAC Address], the only specified host can be connected with

the CSE-H20.

 Allowed IP Range

When the [Allowed IP] is set, the only hosts that are specified by [Allowed IP] and

[Network Mask] can connect to the CSE-H20.

 examples

Allowed IP Net Mask Hosts who can connect to the CSE-H20

10.1.0.1 255.0.0.0 10.1.0.1 ∼ 10.255.255.254

10.1.0.1 255.255.255.0 10.1.0.1 ∼ 10.1.0.254

192.168.1.4 255.255.255.255 192.168.1.4

 Apply to ezManager

If this option is checked, hosts who are not specified above two restrictions can’t search

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and configure CSE-H20 with ezManager. This is enabled when one of restrictions is set at

least.



All security functions are disabled in the ISP mode. So user can access the CSE-H20 in the

ISP mode even though user can’t access the CSE-H20 in the normal mode because of the

[ezTCP Firewall] function.

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9 Checking & Debugging

If user logs in the CSE-H20, user can monitor CSE-H20 status. And if user sets the

debugging option, user can get debugging data with ezManager.

9.1 Telnet

9.1.1 Telnet Login

If the [Telnet] parameter is set, user can log in the CSE-H20. User can monitor the status

of the serial ports and the network.

If user inputs “telnet [CSE-H20 IP Address]”, user can log in the CSE-H20 with telnet.

Then the following message will be shown.

9.1.2 Commands

 Network Status

User can monitor network status of CSE-H20 with the “st net” command.

 Serial Ports’ Status

User can monitor the statuses of two serial ports with the “st sio” command. The

tx_count and the rx_count are the total data sizes to/from the serial ports.

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 Checking Uptime

With “st uptime” command, you can check the time of your device boots up.

 Serial Ports I/O data capture

This command is available on 1.2H or subsequently released firmware version. User can

monitor the input / output data of CSE-H20’s serial ports with the “sd” command. The way

of using this command is like below.

“sd [SPACE] [# of Serial Port] [SPACE] [Interval]”

The value of [# of Serial Port] is that COM1 is “1” and COM2 is “2”. [Interval] means

duration of capturing and printing data on your screen and its unit is mille second (ms).

For example, if you want to capture the data in every second, the value of [Interval]

should be 100.

 Termination of TCP connection

Using “sc” command, users can terminate established TCP connection. The way of using

this command is like below.

“sc [SPACE] [Name of Serial Port] [SPACE] close”

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9.2

Status on ezMan

9.2.1

Status of the CSE

If the [Status] button is pressed on ezManager, user can monitor the current status of the

CSE-

H20 with ezManager.

be updated in every second.

9.2.2

Closing TCP connection by the ezManager

U

ser can terminate a TCP connection with the status window of the ezManager. If use r

clicks the right button of each TCP connection message of the TCP/IP Connection, user can

terminate the TCP connection.

1.8

- 40 -

ager

-H20

If user sets [Refresh Every 1 second] option, the status data will

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9.3 Remote Debugging

If the [Debugging Message] field in the [OPTION] tab of the ezManager, CSE-H20

transmits debugging messages with UDP port 50006. Then user can get the messages with

new window if user presses [Debugging Message] button as followed:

This function is very useful when there are any problems when users install the CSE-H20

in the user site.

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10 Technical Support, Warranty, and Notes on

Operation

10.1

Technical Support

If you have any question regarding operation of the product, visit Customer Support FAQ

corner and the message board on Sollae Systems’ web site or send us an email at the

following address: [e-mail]

Website Address for Customer Support:

http://www.eztcp.com/en/Support/support.php

10.2

Warranty

10.2.1 Refund

Upon the customer’s request to refund the product within two weeks after purchase,

Sollae Systems will refund the product.

10.2.2 Free Repair Services

For product failures occurring within one year after purchase, Sollae Systems provides

free repair services or exchange the product. However, if the product failure is due to

user’s fault, repair service fees will be charged or the product will be replaced at user’s

expense.

10.2.3 Charged Repair Services

For product failures occurring after the warranty period (one year) or resulting from

user’s fault, repair service fees will be charged and the product will be replaced at user’s

expense.

10.2.4 Notes on Operation

 Sollae Systems is not responsible for product failures occurring due to user’s

alternation of the product.

 Specifications of the product are subject to change without prior notice for

performance improvement.

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 Sollae Systems does not guarantee successful operation of the product if the

product was used under conditions deviating from the product specifications.

 Reverse engineering of firmware and applications provided by Sollae Systems is

prohibited.

 Use of firmware and applications provided by Sollae Systems for purposes other

than those for which they were designed is prohibited.

 Do not use the product in an extremely cold or hot place or in a place where

vibration is severe.

 Do not use the product in an environment in which humidity is high or a lot of oil

exists.

 Do not use the product where there is caustic or combustible gas.

 Sollae Systems does not guarantee normal operation of the product under the

conditions a lot of noise exists.

 Do not use the product for a purpose that requires exceptional quality and

reliability relating to user’s injuries or accidents – aerospace, aviation, health care,

nuclear power, transportation, and safety purposes.

 Sollae Systems is not responsible for any accident or damage occurring while using

the product.

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11 Revision History

Date Version

Comment

Jan.15.2007

0.5 Initial touch

Feb.22.2007

1.0 Initial release

Aug.31.2007

1.1 Add Serial Interface

Add Telnet COM Port Control Option

Sep.27.2007

1.2 Add DDNS(Dynamic DNS) function

Dec.04.2008

1.3 Add SSL, SSH function

Modify ISP- pin function

Modify RTS/CTS Flow-control

Modify Test Method

Add AT+PNIP, AT+PRHN

Add Connect with a host name in ATC Mode

Add Close TCP function

Jan.07.2009

1.4 Add security function in the ISP mode

Mar.04.2009

1.5 Add description of serial I/O data capture by using telnet.(sd

command)

Add description of U2S echo

Correct Some Expressions

Mar.31.2009

1.6 Modify the table of 2.3.4. System LEDs

Modify the table of 7.7.1

Modify 10.1 Technical Support

Correct Some Expressions

Apr.21.2009

1.7 Modify the table of 2.3.4. System LEDs

Jul.13.2009

1.8 Add description of Send MAC Address function

Add description of AT+PSE command

Add description of changing local port in ATC mode

Add description of Termination of TCP connection in 9.1.2

Update most of pictures including ezManager and Telnet

Modify the 4.2 Configuration with ezManager

Modify the description about F/W upgrade

Modify the 4.6 Notify IP change

Change the form of document

Correct some expressions