Sollae Systems Co., Ltd.
http://www.sollae.co.kr
Serial Device Server
CSE-H21 User’s Manual
Version 1.7
2009-07-13
CSE-H21 User’s Manual Ver. 1.7
Sollae Systems Co., Ltd.
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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
CSE-H21 User’s Manual Ver. 1.7
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Contents
1 OVERVIEW .................................................................................................................................... - 5 -
1.1 Overview ................................................................................................................................................................ - 5 -
1.2 Components ......................................................................................................................................................... - 5 -
1.3 Specification ......................................................................................................................................................... - 6 -
1.4 Layout ...................................................................................................................................................................... - 7 -
1.4.1 Layout ............................................................................................................................................................ - 7 -
1.4.2 LED indicators............................................................................................................................................. - 8 -
1.4.3 ISP Switch ..................................................................................................................................................... - 8 -
1.5 Interface.................................................................................................................................................................. - 9 -
1.5.1 RS232 Port (DB9M) .................................................................................................................................. - 9 -
1.5.2 Ethernet Interface .................................................................................................................................. - 10 -
1.5.3 Power .......................................................................................................................................................... - 11 -
2 GETTING START ....................................................................................................................... - 12 -
2.1 Installation Method ........................................................................................................................................ - 12 -
2.1.1 Checking the Communication Environment ............................................................................. - 12 -
2.1.2 Connecting to the Network .............................................................................................................. - 13 -
2.1.3 Configuring the Environmental Variables .................................................................................. - 13 -
2.2 Test Run .............................................................................................................................................................. - 13 -
2.2.1 Changing PC IP Address .................................................................................................................... - 13 -
2.2.2 Installing CSE-H21 ................................................................................................................................. - 13 -
2.2.3 Configuring CSE-H21 ........................................................................................................................... - 13 -
2.2.4 Communication Test ............................................................................................................................ - 14 -
3 CONFIGURATION ..................................................................................................................... - 18 -
3.1 IP Address and Environmental Variables ............................................................................................. - 18 -
3.2 Configuring with ezManager ..................................................................................................................... - 18 -
3.2.1 ezManager ................................................................................................................................................ - 18 -
3.2.2 Buttons of ezManager ......................................................................................................................... - 19 -
3.2.3 Parameters of ezManager ................................................................................................................. - 19 -
3.2.4 Matters to be attended to ................................................................................................................ - 20 -
3.3 AT command ..................................................................................................................................................... - 20 -
3.4 IP Address Related Categories Settings via DHCP ......................................................................... - 20 -
3.5 IP Address settings via PPPoE .................................................................................................................. - 21 -
3.6 Notify IP Change ............................................................................................................................................. - 21 -
3.6.1 DDNS (Dynamic Domain Name System) ................................................................................... - 21 -
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3.6.2 TCP/UDP .................................................................................................................................................... - 21 -
4 SYSTEM MANAGEMENT ......................................................................................................... - 23 -
4.1 Operation Mode .............................................................................................................................................. - 23 -
4.1.1 Normal mode .......................................................................................................................................... - 23 -
4.1.2 Serial Configuration Mode ................................................................................................................ - 23 -
4.1.3 ISP Mode ................................................................................................................................................... - 23 -
4.1.4 Comparison between two modes.................................................................................................. - 23 -
4.2 Upgrading Firmware ...................................................................................................................................... - 24 -
4.3 Checking current status ............................................................................................................................... - 25 -
4.3.1 Telnet login .............................................................................................................................................. - 25 -
4.3.2 Commands ................................................................................................................................................ - 25 -
4.4 Check Status in the ezManager ............................................................................................................... - 27 -
4.5 Remote Debugging ....................................................................................................................................... - 28 -
5 COMMUNICATION MODE ...................................................................................................... - 29 -
5.1 Introduction ....................................................................................................................................................... - 29 -
5.2 T2S – TCP Server ............................................................................................................................................. - 30 -
5.2.1 TCP Connection ...................................................................................................................................... - 30 -
5.2.2 Serial Data before the TCP Connection ...................................................................................... - 30 -
5.2.3 Data Transmission ................................................................................................................................. - 30 -
5.2.4 Disconnection .......................................................................................................................................... - 31 -
5.3 COD – TCP Client ............................................................................................................................................ - 32 -
5.3.1 Serial Data before the TCP Connection ...................................................................................... - 32 -
5.3.2 Data Transmission ................................................................................................................................. - 32 -
5.3.3 Disconnection .......................................................................................................................................... - 33 -
5.3.4 DNS .............................................................................................................................................................. - 33 -
5.4 ATC – AT Command ...................................................................................................................................... - 34 -
5.5 U2S – UDP.......................................................................................................................................................... - 35 -
6 ATC MODE ................................................................................................................................ - 36 -
6.1 Overview ............................................................................................................................................................. - 36 -
6.1.1 AT command format ............................................................................................................................ - 36 -
6.2 Basic AT Command Set (Example: ATA, ATD etc.) .......................................................................... - 36 -
6.3 Extended AT Commands (Example: AT+PLIP etc.) .......................................................................... - 37 -
6.4 Online State and AT Command State ................................................................................................... - 37 -
6.4.1 Changing Online State to AT Command State ....................................................................... - 38 -
6.4.2 Changing AT Command State to Online State ....................................................................... - 38 -
6.5 Example of Configuration with AT Command .................................................................................. - 38 -
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6.6 Example of TCP Connection ...................................................................................................................... - 39 -
6.6.1 Example of Active Connection ........................................................................................................ - 39 -
6.6.2 Example of Active Connection with host name ...................................................................... - 39 -
6.6.3 Example of passive Connection ...................................................................................................... - 40 -
6.7 Example of TCP Disconnection ................................................................................................................ - 40 -
6.7.1 Example of active disconnection .................................................................................................... - 40 -
6.7.2 Example of passive disconnection ................................................................................................. - 40 -
7 SECURITY PROTOCOLS & OPTION ....................................................................................... - 41 -
7.1 SSL ......................................................................................................................................................................... - 41 -
7.1.1 SSL (Secure Socket Layer) .................................................................................................................. - 41 -
7.1.2 How to set the SSL on CSE-H21 .................................................................................................... - 41 -
7.1.3 Restriction ................................................................................................................................................. - 42 -
7.2 SSH ........................................................................................................................................................................ - 42 -
7.2.1 SSH (Secure Shell) ................................................................................................................................. - 42 -
7.2.2 How to set the SSH on CSE-H21 ................................................................................................... - 42 -
7.2.3 Restriction ................................................................................................................................................. - 43 -
7.3 ezTCP Firewall ................................................................................................................................................... - 43 -
8 TECHNICAL SUPPORT, WARRANTY, AND NOTES ON OPERATION .............................. - 45 -
8.1 Technical Support ........................................................................................................................................... - 45 -
8.2 Warranty .............................................................................................................................................................. - 45 -
8.2.1 Refund......................................................................................................................................................... - 45 -
8.2.2 Free Repair Services ............................................................................................................................. - 45 -
8.2.3 Charged Repair Services .................................................................................................................... - 45 -
8.2.4 Notes on Operation ............................................................................................................................. - 45 -
9 REVISION HISTORY.................................................................................................................. - 47 -
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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-H21 in ezTCP product group is a product that provides TCP/IP communication
through Ethernet. In other words, like other ezTCP products, CSE-H21 sends data from the
serial port to the LAN after TCP/IP processing and vice versa.
As CSE-H21 has 2 RS232 ports, it can be connected to two RS232 devices in the same
time. And it is easy CSE-H21 to attach to user systems because of its compact size.
Because it has SSL and SSH function, user can communicate more safely. And 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 can be operated wide range temperature condition and its serial ports are isolated
electrically and there is surge protection function on the Ethernet port, so it is very suitable
for noisy industrial environment.
It also provides debugging function, so user can solve the problem with ours.
1.2 Components
CSE-H21 Body
CD including utilities and documents (Option)
5V Power Adapter (Option)
RS232 cable for PC connection (Option)
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1.3 Specification
Power
Input Voltage
5V (±10%)
Current
200mA typical
Dimension
158mm x 90mm x 24mm
Weight
about 340g
Interface
Serial
9 pin Dsub male
Network
10/100 Base T (RJ45)
Serial Port
2 x RS232 (300bps ~ 230400bps, RTS/CTS Flowcontrol)
Network
Ethernet 10/100 M bit auto-sense
Auto MDI/MDIX
Protocols
TCP, UDP, IP, ICMP, ARP, DHCP, PPPoE,
DNS lookup, DDNS(Dynamic DNS)
Telnet COM Port Control Option(RFC2217)
SSL3.0/TLS1.0, SSH
Diagnostic
Online Debugging Function
RoHS
RoHS Compliant
Approvals
MIC: SLS-CSE-H21 (A)
CE: F690501/SP-EMY000088
FCC: F690501/RF-EMY002716
Communicati
on Mode
T2S
TCP Server Mode
COD
TCP Client Mode
ATC
TCP Server / Client
(AT command emulation)
U2S
UDP
Utilities
ezManager
Configuration utility via LAN
Ezterm
Socket test utility
Hotflash
Firmware download utility via TFTP
ezVSP
Serial-TCP/IP virtual driver for Windows
You can download the firmware from our website (http://www.eztcp.com).
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1.4 Layout
1.4.1 Layout
There are an Ethernet port, two RS232 ports, and a Power socket on the top side. And
there is an ISP switch on the right side. And 15 LED indicators are in the CSE-H21.
Figure 1-1 CSE-H21 Layout
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1.4.2 LED indicators
There are 15 LED indicators on the CSE-H21. The left 5 are for LAN status, and the
middle and right 5 are for COM1 and COM2 respectively. The followings are the
operations of each LED indicators.
Table 1-1 LED indicators
Mode
Name
Color
LED Status
Description
Common
LAN
PWR
Red
On
Power is supplied.
LINK
Green
On
CSE-H21 is connected to the
Ethernet.
RXD
Yellow
Blinks
Ethernet packet is received
TXD
Green
Blinks
Ethernet packet is transmitted
COM
RXD
Yellow
Blinks
serial data are received
TXD
Green
Blinks
serial data are transmitted
RTS
Green
On
There are enough rooms to
receive serial data.
CTS
Yellow
On
CTS signal from the counter-part
serial device
Normal
mode
LAN
STS
Yellow
Blinks in
every second
IP address is assigned.
Blinks 4 times
/sec
IP address is net assigned in
DHCP or PPPoE modes.
COM
TCP
Green
On
TCP is connected
ISP
mode
LAN
STS
Yellow
Off
CSE-H21 is in the ISP mode
Serial
Configuration
mode
LAN
RXD/
TXD/
STS
-
blink 2 times
/sec
at one time
CSE-H21 is in the Serial
Configuration mode
COM1
TCP
Green
On
A RS232 cable is connected for
the serial configuration.
1.4.3 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-H21 operates as ISP mode.
User can do firmware download to the CSE-H21 in the ISP mode. Please refer to 4.2 for
more information on firmware download.
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1.5 Interface
1.5.1 RS232 Port (DB9M)
There are two RS232 ports. The ports are interfaced with 9 pin D-sub male connectors.
The serial ports are isolated electrically.
Figure 1-2 9 pin D-sub male connector
RS232 ports
Table 1-2 RS232 Port Specification
Number
Name
Description
level
Dir.
Etc.
1
DCD
Data Carrier Detect
RS232
Input
optional
2
RXD
Receive Data
RS232
Input
mandatory
3
TXD
Transmit Data
RS232
Output
mandatory
4
DTR
Data Terminal Ready
RS232
Output
optional
5
GND
Ground
Ground
-
mandatory
6
DSR
Data Set Ready
RS232
Input
optional
7
RTS
Request To Send
RS232
Output
optional
8
CTS
Clear To Send
RS232
Input
optional
9
RI
Ring Indicator
RS232
Input
optional
Data bits, Parity, Stop bit
Table 1-3 RS232 Parameters
Items
Parameters
Data bit
8, 7, 6, 5
Parity
None, Even, Odd, Mark, Space
Stop bit
1, 1.5, 2
Flow Control
CSE-H21 has RTS/CTS flow-control function.
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Telnet COM Port Control Option
CSE-H21 has a Telnet COM Port Control function that is defined in the RFC2217. If this
option is set, CSE-H21 transmits serial input signals (CTS, DSR) to the peer host and set
the values (RTS, DTR, baud rate, data bits, parity, stop bit) onto its serial ports from the
peer host.
TX Delay
CSE-H21 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-H21‟s serial ports. Its
unit is byte.
1.5.2 Ethernet Interface
Network part of CSE-H21 is configured with Ethernet. So, what you have to do is only to
connect UTP cable. The Ethernet part detects 10Mbit or 100Mbit Ethernet automatically, to
connect the corresponding cable. It also provides auto MDI/MDIX function to detect 1:1
cable or cross-over cable automatically. Each piece of Ethernet equipment has unique
hardware addresses, and CSE-H21also has factory-set hardware address (which is called
MAC address)
Figure 1-3 RJ45 Ethernet connector
Table 1-4 Ethernet port pin description
Number
Name
Direction
1
Tx+
Output
2
Tx-
Output
3
Rx+
Input
4 - -
5 - - 6 Rx-
Input
7 - -
8 - -
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1.5.3 Power
DC5V is used for CSE-H21 and the specification is below:
Figure 1-4 DC 5V Power Jack
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2 Getting Start
2.1 Installation Method
You can install CSE-H21 in the following steps.
Table 2-1 CSE-H21 Installation steps
Title
Item
Sub-item
1.
Checking the
communication
environment
Check items
IP address environment
Serial port parameters
Application program to be used
2.
Connecting to
the network
Check
method
Check the LINK LED
3.
Configuring
the
environmental
parameters
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
2.1.1 Checking the Communication Environment
Before installing CSE-H21, check the network environment where CSE-H21 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-H21 is going to be connected (RS232)
Serial port items of the equipment to which CSE-H21 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)
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2.1.2 Connecting to the Network
Connect power to CSE-H21, and connect CSE-H21 either directly to the Ethernet port of
the PC where test is to be performed or to the network (hub) to which the PC is
connected.
2.1.3 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.
2.2 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.
2.2.1 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
-
2.2.2 Installing CSE-H21
Connect the supplied RS232 cable between your PC and CSE-H21, the LAN cable to the
hub to which the PC is connected or directly to the PC, and the supplied CSE-H21 power
adapter to CSE-H21 for power supply. If the LAN cable has been correctly connected when
power is supplied, LINK LED turns on.
2.2.3 Configuring CSE-H21
Configure CSE-H21 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-H21s on the local network.
When ezTCP is searched, MAC address of the ezTCP is displayed on the [Search Result]
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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
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
2.2.4 Communication Test
Power the CSE-H21 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.
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Press the [Open] button after selecting serial port that is connected to the CSE-H21. 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
[Send] box will be transmitted to the [Receive] box on the RS232 part (Bottom).
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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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3 Configuration
3.1 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-H21.
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-H21 over the
network, or by using AT commands in ATC mode
3.2 Configuring with ezManager
3.2.1 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.
The 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.
Figure 3-1 the initial window of the ezManager
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3.2.2 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
3.2.3 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
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Serial Port
Serial Port
Serial Type, TTL, Baud Rate, Parity, Data Bits, Stop
Bit, Flow Control, DTR/DSR, TX Interval
TCP/IP
Communication Mode, Peer Address,
Peer Port, Local Port, Event Byte, Timeout,
Data Frame
3.2.4 Matters to be attended to
ezManager can be used when you want to change your device‟s environment variables.
In case of CSE-H21, two interfaces are supported and those are Ethernet and RS232 port.
Using Ethernet Port
For use ezManager through Ethernet, CSE-H21 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-H21 should be connected to PC
with RS232 cross cable but also has to be operated as serial configuration mode.
3.3 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”.
3.4 IP Address Related Categories Settings via DHCP
In the network environment composing DHCP server, settings related to CSE-H21‟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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3.5 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-H21 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.
3.6 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.
3.6.1 DDNS (Dynamic Domain Name System)
If the CSE-H21 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-H21‟s IP address,
user can connect to the CSE-H21 by the host name (after DNS looking up.) The DDNS
service provider that the CSE-H21 supports is only Dyndns (http://www.dyndns.com)
currently.
3.6.2 TCP/UDP
In addition, CSE-H21 can transmit some information to user‟s TCP/UDP servers each
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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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4 System Management
4.1 Operation Mode
CSE-H21 can operate in one of two modes (normal and ISP modes). Normal mode is
ordinary data communication mode; and ISP mode is used to download CSE-H21 firmware
through the Ethernet port.
4.1.1 Normal mode
The normal mode is an operation mode that CSE-H21‟s works for normal purposes. If
CSE-H21 boots up without any other treatment, it works in the normal mode.
Please refer to the 5. Normal Mode.
4.1.2 Serial Configuration Mode
If you press the switch on the side of the body in the normal mode for 20ms ~ 1s, it
works in the Serial Configuration Mode. You can set the environmental variables through
the COM1 port in this mode.
4.1.3 ISP Mode
If you press the switch on the side of the body in the normal mode over 1 second, it
works in the ISP mode.
You can download new firmware to CSE-H21 with hotflash program that is a TFTP client
through the Ethernet.
And you can configure the CSE-H21 in the ISP mode even though you forget its
password or you can‟t access the CSE-H21 because the [Access Lock] function is enabled.
(All security functions are disabled in the ISP mode)
4.1.4 Comparison between two modes
The following is a comparison between the normal mode and the ISP mode.
Table 4-1 Operation Mode
Mode
How to initiate
Description
Baudrate
normal
Power on CSE-H21
without pressing the
ISP button
Normal data communication
mode
T2S, ATC, COD, U2S
the value that
user set
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Serial
Configuration
Pressing the ISP
button for 20ms~1s.
Configuring CSE-H21
through COM1
115200bps/N/
8/1
ISP
Pressing the ISP
button over 1 second
Firmware download mode
All security functions are
diabled
115200bps/N/
8/1
4.2 Upgrading Firmware
In ISP mode, you can download a firmware (CSE-H21 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.
Supply power with pressing ISP button or push the button over 1 second, then CSE-
H21 operates in the ISP mode.
Run hotflash that is supplied by us and input IP address of CSE-H21 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-H21 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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4.3 Checking current status
4.3.1 Telnet login
You can log in the CSE-H21 if you enable the [Telnet option] in the [OPTION] tab of the
ezManager. Then you can check the network and serial status after logging in the CSE-H21.
If you press “telnet [CSE-H21‟s IP address]” on the command prompt of Windows, you can
log in CSE-H21
4.3.2 Commands
Network Status
User can monitor network status of CSE-H21 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.
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-H21‟s serial ports with the “sd” command. The
way of using this command is like below.
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“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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4.4 Check Status in the ezManager
If you press the [STATUS] in the ezManager, you can monitor the current status of CSE-
H21. If user sets [Refresh Every 1 second] option, the status data will be updated in every
second.
And user can close the TCP connection in the TCP/IP Connection window with mouse-
right button.
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4.5 Remote Debugging
If the [Debugging Message] field in the [OPTION] tab of the ezManager, CSE-H21
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-H21
in the user site.
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5 Communication Mode
5.1 Introduction
Normal communication mode is suitable for the purpose of using CSE-H21.
Normal communication mode can be classified into four modes – T2S, ATC, COD, and
U2S – each of which is described in the following table.
Table 5-1 Communication Mode
Communic
ation
Mode
Protocol
Connection
Need for user
Equipment Software
Modification
Configuring
environmental
variable via serial
port
Topolo
gy
T2S
TCP
Passive
Not needed
Impossible
1:1
ATC
TCP
Active
Passive
Needed
Possible
1:1
COD
TCP
Active
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.
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5.2 T2S – TCP Server
In T2S mode, the CSE-H21 functions as a server.
When a host connects to predefined local port, the CSE-H21 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.
Remote Host Serial DeviceezTCP
Listen on
local port
Request TCP connection
Accept TCP connection
ack
DATA “ABC”
DATA “ABC” (TCP/IP)
DATA “DEF” (TCP/IP)
DATA “DEF”
connected
<T2S Mode>
5.2.1 TCP Connection
If a host connects to the pre-defined [Local Port] of CSE-H21, the host can communicate
bi-directionally.
5.2.2 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-H21 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.
5.2.3 Data Transmission
When the TCP connection is established, the data communication in between the host
and the serial device will be established. Then, CSE-H21 will send data according to the
[Data Frame]. In other words, when the data comes through CSE-H21‟s serial port, it will
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be temporarily saved in the buffer. Then, when there is no incoming data during the
designated [Data Frame], CSE-H21 will send the saved data. If the [Data Frame] is 0, CSEH21 will send serial port‟s data immediately. The unit used for the [Data Frame] is 10m
seconds, so CSE-H21 rounds down rest of the values.
5.2.4 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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5.3 COD – TCP Client
In COD mode, the ezTCP functions as a client.
When data of the pre-specified size [Event Byte] comes to the serial port, the ezTCP
attempts a TCP connection to the TCP port [Peer Port] of the preset host IP [Peer IP
Address]. If the remote host accepts the TCP connection, TCP connection will be
established. Data coming to the serial port after connection establishment is TCP/IP-
processed and transmitted to the remote host. And, data coming from the remote host is
TCP/IP-processed and transmitted to the serial port for data communication.
5.3.1 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 CSE-H21‟s serial port 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.
5.3.2 Data Transmission
When the TCP connection is established, the data communication in between the host
and the serial device will be established. Then, CSE-H21 will send data according to the
[Data Frame]. In other words, when the data comes through CSE-H21‟s serial port, it will
be temporarily saved in the buffer. Then, when there is no incoming data during the
designated [Data Frame], CSE-H21 will send the saved data. If the [Data Frame] is 0, CSEH21 will send serial port‟s data immediately. The unit used for the [Data Frame] is 10
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milliseconds, so CSE-H21 rounds down rest of the values.
5.3.3 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.
5.3.4 DNS
If users set the host name instead of the IP address on the [Peer Address] box, CSE-H21
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.
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5.4 ATC – AT Command
In ATC mode, the user can control the CSE-H21 in a similar way to controlling the
modem using AT command. In ATC mode, only a TCP connection is possible and both
the 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 detailed information on AT commands, please refer to the “7. ATC mode”.
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5.5 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-H21‟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-H21 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.
Serial DeviceezTCP
DATA “ABC” (UDP)
5ms
<U2S Transmission sequence – Byte Count:3, Guard Time: 1>
Remote Host
“AB”
“C”
“A”
“BC”
10ms
DATA “A” (UDP)
“A”
9ms
DATA “BCA” (UDP)
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-H21 can send multiple hosts one by
one. This function is available on 1.2H or subsequently released firmware version.
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6 ATC Mode
6.1 Overview
CSE-H21 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-H21 communicates several hosts alternatively.
And also, it provides passive connection function by ATA command.
6.1.1 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?)
6.2 Basic AT Command Set (Example: ATA, ATD etc.)
Command
Function
Description
A
passive connection
Listen connection (host → CSE-H21 connection)
D
active connection
Connecting to host form CSE-H21
E
echo
Echo (E0 – no echo, E1-echo)
H
off-hook
disconnection
I
Info
Output CSE-H21 related-information
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ATI3: the firmware version
ATI7: MAC address
O
Online
To online mode
V
enable result code
Result code (numeric-V0, alphabetic-V1)
Z
reset
Reset
6.3 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-H21 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
6.4 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.
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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-H21 convert TCP
and send to Ethernet
6.4.1 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-H21 as following time interval.
When transmitting +++ string to CSE-H21, +++ 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.
6.4.2 Changing AT Command State to Online State
If CSE-H21‟s state is in AT command state during TCP connection, CSE-H21‟s state can
be changed into online state by an ATO command.
6.5 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
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◀
<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
6.6 Example of TCP Connection
6.6.1 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
6.6.2 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-H21 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
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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.
6.6.3 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
A host connects to CSE-H21
◀
<CR><LF>CONNECT<CR><LF>
TCP connection OK
Data Communication
6.7 Example of TCP Disconnection
6.7.1 Example of active disconnection
CSE-H21 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
6.7.2 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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7 Security Protocols & Option
7.1 SSL
7.1.1 SSL (Secure Socket Layer)
SSL is cryptographic protocol that provides secure communication on the Internet. The
SSL works over TCP.
7.1.2 How to set the SSL on CSE-H21
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-H21 with telnet client.
Generate an RSA key with a command. CSE-H21 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.
7.1.3 Restriction
To use the SSL with CSE-H21, there is a restriction. You can use only one serial port
(COM1) if you set the SSL function.
7.2 SSH
7.2.1 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.
7.2.2 How to set the SSH on CSE-H21
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-H21 with telnet client.
Generate an RSA key with a command. CSE-H21 supports 512, 768, and 1024 length
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keys.
Command Format: rsa keygen [key length]
Generate a DSA key with a „dsa keygen‟.
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.
7.2.3 Restriction
To use the SSH function with CSE-H21, there is a restriction. You can use only T2S mode
(TCP Server mode) if you set the SSH function
7.3 ezTCP Firewall
CSE-H21 has two connection limitation functions. Those can be set by the [Option] tab
of the ezManager.
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Allowed MAC Address
If user sets the [Allowed MAC Address], the only specified host can be connected with
the CSE-H21.
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-H21.
examples
Allowed IP
Net Mask
Hosts who can connect to the CSE-H21
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
and configure CSE-H21 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-H21 in the
ISP mode even though user can‟t access the CSE-H21 in the normal mode because of the
[ezTCP Firewall] function.
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8 Technical Support, Warranty, and Notes on
Operation
8.1 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: support@eztcp.com
Website Address for Customer Support:
http://www.eztcp.com/en/Support/support.php
8.2 Warranty
8.2.1 Refund
Upon the customer‟s request to refund the product within two weeks after purchase,
Sollae Systems will refund the product.
8.2.2 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.
8.2.3 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.
8.2.4 Notes on Operation
Sollae Systems is not responsible for product failures occurring due to user‟s
alternation of the product.
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Specifications of the product are subject to change without prior notice for
performance improvement.
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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9 Revision History
Date
Version
Comments
Jun. 03. 2008
1.0
Initial Release
Aug. 01. 2008
1.1
Add SSL and SSH functions
Add WEEE notation
Dec. 04. 2008
1.2
Modify ISP button function
Add AT+PNIP, AT+PRHN
Add Connect with a host name in ATC Mode
Add Close TCP function
Jan. 07. 2009
1.3
Add security function in the ISP mode
Mar. 04. 2009
1.4
Add description of serial I/O data capture by using telnet.(sd
command)
Add description of U2S echo
Correct Some Expressions
Mar. 31. 2009
1.5
Modify the table of 1.4.2
Modify the table of 6.7.1
Correct Some Expressions
Modify 8.1 Technical Support
Apr.22.2009
1.6
Modify the table of 1.4.2
Jul.13.2009
1.7
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 TELNET
Update most of pictures including ezManager and Telnet
Modify the 3.2 Configuration with ezManager
Modify the description about F/W upgrade
Modify the 3.6 Notify IP change
Change the form of document
Correct some expressions
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