Sollae Systems Co., Ltd.
http://www.ezTCP.com
2 Ports RS232 Ethernet Converter
CSE-H21 User Manual
Version 2.4
CSE-H21 User Manual Ver. 2.4
Sollae Systems Co., Ltd.
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http://www.ezTCP.com
This symbol, found on your product or on its packaging, indicates that this
product should not be treated as household waste when you wish to dispose
of it. Instead, it should be handed over to an applicable collection point for the
recycling of electrical and electronic equipment. By ensuring this product is
disposed of correctly, you will help prevent potential negative consequences to the
environment and human health, which could otherwise be caused by inappropriate disposal
of this product. The recycling of materials will help to conserve natural resources. For more
detailed information about the recycling of this product, please contact your local city
office, household waste disposal service or the retail store where you purchased this
product.
※ This equipment obtained certification by using 1.5M serial cable.
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Contents
1 Overview .................................................................................................................................. - 5 -
1.1 Overview ................................................................................................................................................................ - 5 -
1.2 Components ......................................................................................................................................................... - 5 -
1.3 Specification ......................................................................................................................................................... - 6 -
1.3.1 Hardware ...................................................................................................................................................... - 6 -
1.3.2 Software ........................................................................................................................................................ - 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 .................................................................................................................................. - 11 -
1.5.3 Power ........................................................................................................................................................... - 12 -
2 Getting Start ......................................................................................................................... - 13 -
2.1 Installation Method ........................................................................................................................................ - 13 -
2.1.1 Checking the Communication Environment ............................................................................. - 13 -
2.1.2 Connecting to the Network .............................................................................................................. - 14 -
2.1.3 Configuring the Environmental Variables ................................................................................... - 14 -
2.2 Test Run ............................................................................................................................................................... - 14 -
2.2.1 Changing PC IP Address .................................................................................................................... - 14 -
2.2.2 Installing CSE-H21 ................................................................................................................................. - 14 -
2.2.3 Configuring CSE-H21 ........................................................................................................................... - 14 -
2.2.4 Communication Test ............................................................................................................................. - 16 -
3 Configuration ....................................................................................................................... - 19 -
3.1 IP Address and Environmental Variables ............................................................................................. - 19 -
3.2 Configuring with ezManager ..................................................................................................................... - 19 -
3.2.1 ezManager ................................................................................................................................................ - 19 -
3.2.2 Buttons of ezManager ......................................................................................................................... - 20 -
3.2.3 Parameters of ezManager .................................................................................................................. - 20 -
3.2.4 Matters to be attended to ................................................................................................................ - 21 -
3.3 AT command ..................................................................................................................................................... - 21 -
3.4 Notify IP Change ............................................................................................................................................. - 21 -
3.4.1 DDNS (Dynamic Domain Name System) .................................................................................... - 21 -
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3.4.2 TCP/UDP..................................................................................................................................................... - 22 -
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 -
4.6 Sending MAC Address.................................................................................................................................. - 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 -
5.4.1 Key parameters ....................................................................................................................................... - 34 -
5.4.2 Examples .................................................................................................................................................... - 35 -
5.5 UDP ....................................................................................................................................................................... - 38 -
5.5.1 Key parameters ....................................................................................................................................... - 38 -
5.5.2 Examples .................................................................................................................................................... - 39 -
6 Security Protocols & Option ............................................................................................. - 41 -
6.1 SSL ......................................................................................................................................................................... - 41 -
6.1.1 SSL (Secure Socket Layer) .................................................................................................................. - 41 -
6.1.2 How to set the SSL on CSE-H21 .................................................................................................... - 41 -
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6.1.3 Restriction.................................................................................................................................................. - 42 -
6.2 SSH ........................................................................................................................................................................ - 42 -
6.2.1 SSH (Secure Shell) ................................................................................................................................. - 42 -
6.2.2 How to set the SSH on CSE-H21 ................................................................................................... - 42 -
6.2.3 Restriction.................................................................................................................................................. - 43 -
6.3 ezTCP Firewall ................................................................................................................................................... - 44 -
7 Related material ................................................................................................................... - 45 -
7.1 Technical Documents .................................................................................................................................... - 45 -
7.2 Smart phone application ............................................................................................................................. - 45 -
8 Technical Support and Warranty ...................................................................................... - 46 -
8.1 Technical Support ........................................................................................................................................... - 46 -
8.2 Warranty .............................................................................................................................................................. - 46 -
8.2.1 Refund ......................................................................................................................................................... - 46 -
8.2.2 Free Repair Services ............................................................................................................................. - 46 -
8.2.3 Charged Repair Services..................................................................................................................... - 46 -
9 Precaution and Exemption from Liability ....................................................................... - 47 -
9.1 Precaution........................................................................................................................................................... - 47 -
9.2 Exemption from Liability .............................................................................................................................. - 48 -
9.2.1 English version ........................................................................................................................................ - 48 -
9.2.2 French version ......................................................................................................................................... - 48 -
10 Revision History ................................................................................................................... - 51 -
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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 (Optional)
5V Power Adapter (Optional)
RS232 cable for PC connection (Optional)
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1.3 Specification
1.3.1 Hardware
Power
Input Voltage
DC 5V (±10%)
Current
270mA typical
Dimension
158mm x 90mm x 24mm
Weight
About 340g
CPU
Arm7 Core
Serial Port
Serial
2 × RS232 – RTS/CTS Flow Control
(Baud rate: 300bps ~ 230,400bps)
Network
Ethernet 10Base-T or 100Base-TX (Auto-Sensing)
Auto MDI / MDIX cable auto-sense
Temperature
Storage Temperature: -40 ~ 85℃
/ Operating Temperature: -40 ~ 85℃
Certification
MIC, CE, FCC
RoHS
RoHS Compliant
1.3.2 Software
Protocol
TCP, UDP, IP, ICMP, ARP, DHCP, PPPoE, DNS lookup, DDNS(Dynamic
DNS), Telnet COM Port Control Option(RFC2217), SSL, SSH
Diagnose
Online Debugging Function
Operation
mode
Normal
For Normal Data Communication
ISP
For Upgrading F/W
Serial Configuration
For Configuration via Serial
Communicat
ion mode
TCP Server
TCP Passive Connection
TCP Client
TCP Active Connection
AT Command
TCP Passive / Active Connection
UDP
UDP – No Connection
Major
Utilities
ezManager
Configuration Utility for MS Windows
(Supports Downloading F/W)
ezVSP
Serial to TCP/IP Virtual driver for MS Windows
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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 supports RTS/CTS Hardware Flow Control.
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Telnet COM Port Control Option (RFC2217)
CSE-H21 has Telnet COM Port Control Option function that is specified by RFC2217.
If the Telnet COM Port Control Option is enabled, CSE-H21 sends the CTS, DSR control
signal to the communication counterpart, and CSE-H21 sets its serial port items (RTS,
DTR, Baud rate, data bits, parity, stop bit) after getting information from the
communication counterpart.
Disable TCP Transmission Delay
If you use this option, CSE-H21 sends the data from the serial port to Ethernet as
quickly as possible.
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.
TCP Server / Client mode
This mode is available on TCP client mode only. In this mode, you don’t need to
change the mode for switching active or passive TCP connection. Note that the
[Event Byte] option should be set to 1 or lager value.
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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]
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.
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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
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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.
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 2000 Pro, ME, XP Pro/Home,
Vista, 7). 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
Serial Port
Serial Port
Serial Type, TTL, Baud Rate, Parity, Data Bits, Stop
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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 “5.4. ATC Mode”.
3.4 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.
3.4.1 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://dyn.com/dns/) currently.
All about service usage of an account could be changed according to the policy
of DynDNS.
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3.4.2 TCP/UDP
In addition, CSE-H21 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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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
Baud rate
normal
Power on CSE-H21
without pressing the
ISP button
Normal communication Mode
T2S, ATC, COD, U2S
the value
that user set
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
Security options are disabled
115200bps/
N/8/1
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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.
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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.
“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 CSEH21. 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 mouseright 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.
4.6 Sending MAC Address
[Sending MAC Address] is a function that CSE-H21 sends its MAC address to the remote
host right after the connection is established. By using this function, a server can identify
multiple devices with the information.
① Move to the [Option] tab.
② Check the [Send MAC Address] option
This function is available on 1.3A or subsequently released firmware version.
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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 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
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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/IPprocessed 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
milliseconds, so CSE-H21 rounds down rest of the values.
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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
AT command is a mode which users control CSE-H21 with AT command like controlling
modem. In this mode, active and passive TCP connections are available. And users are
allowed to configure some environmental parameters with extended commands.
5.4.1 Key parameters
The configuration should be implemented via the serial port of CSE-H21.
Table 5-1 some of extended commands for configuration
Commands
Description
Examples
+PLIP
Local IP Address
at+plip=10.1.0.1<CR>
+PLP
Local Port
at+plp=1470<CR>
+PRIP
Peer IP Address
at+prip=10.1.0.2<CR>
+PRP
Peer Port
at+prp=1470<CR>
+PDC
DHCP
at+pdc=1 (ON)<CR>
+PPE
PPPoE
at+ppe=1 (ON)<CR>
+PTO
Timeout
at+pto=10<CR>
+PWP
Store setting
at+pwp<CR>
Related items with IP Address and Local Port
Local port can be set as well as IP address related parameters like IP Address, Subnet
Mask and Gateway IP Address.
Peer Address / Peer Port
IP address and local port of a remote host are can be set.
Type of assigning IP address: Manual, DHCP, PPPoE
Not only manual setting, also automatic assigning protocol (DHCP, PPPoE) are
available.
Others
Some of options including [Timeout] can be configured in this mode.
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5.4.2 Examples
TCP Server – setting parameters and passive connection
Figure 5-1 TCP passive connection
Table 5-2 states of each point
Points
States
~
Set parameters in the AT command mode
①
CSE-H21 listens TCP connection requests with the ATA
command
~
CSE-H21 is listening TCP connection requests
②
A remote host has sent SYN segment to CSE-H21
~
Processes of TCP connection
③
TCP connection has been established
~
CSE-H21 sends “CONNECT” message to the serial port
Most of the response messages from the serial port of CSE-H21 are omitted on
above figure.
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TCP Client – setting parameters and active connection
Figure 5-2 TCP Active connection
Table 5-3 states of each point
Points
States
~
Set parameters in the AT command mode
①
CSE-H21 sends a TCP connection request with the ATD
command
~
Processes of TCP connection
②
TCP connection has been established
~
CSE-H21 sends “CONNECT” message to the serial port
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Termination of online status – entering the AT command mode
Figure 5-3 Termination of online status
Table 5-4 states of each point
Points
States
~
Keeps TCP connection
①
CSE-H21 enters the AT command mode with receiving “+++”
~
Keeps AC command mode
②
CSE-H21 terminates TCP connection with ATH command
~
Processes of TCP disconnection
③
TCP connection has been terminated
~
CSE-H21 sends “NO CARRIER” with disconnection
CSE-H21 changes the mode to AT command, when receiving “+++” and sending “OK”
message. In this state, the communication with remote host is not possible because CSEH21 processes only AT command. Whenever you want to go back to online state (TCP
connection), use “ATO” command.
For more information about this, please refer to the “ATC mode” on the
[Download] >> [Technical Document] menu of our web site.
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5.5 UDP
UDP has no processes of connection. In this mode, 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.
5.5.1 Key parameters
Block Size(Byte)
[Block Size(Byte)] means the size of a block in UDP mode. Its unit is byte. The size of
bytes are come into the serial port, CSE-H21 sends them as one block to the network.
The maximum value could be 1460 bytes.
Data Frame
[Data Frame] means the time for gathering data to make one block. Its unit is 10ms.
If there are no transmission during the time which is set to this value, CSE-H21 sends
gathered data in the buffer as one block to the network.
Please set this value to 11 or higher values for correct operation.
Once one of the parameters is sufficient, the block size is decided as the
condition.
Dynamic update of Peer host
If users set the value of [Peer Address] and [Peer Port] to 0, [dynamic update of peer
host] function is activated. By using this function, CSE-H21 can communicate to
multiple hosts without additional setting.
This function is available on 1.2H or subsequently released firmware version.
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5.5.2 Examples
Block Size: 5 bytes / Data Frame: 1s (100 by 10ms)
Figure 5-4 time chart for Block Size is 5 bytes and data frame is 1s
Table 5-5 states of each point
Points
States
~
CSE-H21 is receiving data from the serial port
①
CSE-H21 Sends 5 bytes as one block based on the [Block Size]
~
Serial device sends data “678” to the CSE-H21
②
Data “678” has arrived
~
CSE-H21 sends data from the remote host to the serial device
③
1 second has passed
~
CSE-H21 sends data “678” based on the [Data frame]
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Dynamic Update of Peer host
This is a function that CSE-H21 automatically sets its peer host with information of
the last packet which is received from network. In the packet, the source address and
port number is used.
Table 5-6 setting for [dynamic update of peer host] function
Parameters
Values
Peer Address
0 (None)
Peer Port
0
Figure 5-5 time chart for [dynamic update of peer host]
Table 5-7 states of each point
Points
States
~
Remote host 2 sends data to CSE-H21
①
CSE-H21 sets host 2 to peer host
~
Remote host 1 sends data to CSE-H21
②
CSE-H21 updates host 1 to peer host
~
Remote host 2 sends data again to CSE-H21
③
CSE-H21 updates host 2 to peer host
~
CSE-H21 can communicate with remote host 2
The data “ABC”, “DE”, “FGH” are from the serial port of CSE-H21 in the Fig 5-5.
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6 Security Protocols & Option
6.1 SSL
6.1.1 SSL (Secure Socket Layer)
SSL is cryptographic protocol that provides secure communication on the Internet. The
SSL works over TCP.
6.1.2 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]
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Make a certificate with a ‘cert new’ command. The certificate is a self signed.
Save the parameters for SSL with the ‘ssl save aa55cc33’ command.
6.1.3 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.
6.2 SSH
6.2.1 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.
6.2.2 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.
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Generate an RSA key with a command. CSE-H21 supports 512, 768, and 1024
length 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.
6.2.3 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
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6.3 ezTCP Firewall
CSE-H21 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-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 CSEH21 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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7 Related material
7.1 Technical Documents
You can find the technical documents at our website.
DataSheet
IP Change Notification (DDNS)
How to use SSL
How to use SSH
Sending MAC Address function
Telnet COM Port Control Option
etc
7.2 Smart phone application
ezManager (iOS)
ezManager (Android)
TCP/IP Client (Android)
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8 Technical Support and Warranty
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:
E-mail: support@eztcp.com
Website Address for Customer Support: http://www.eztcp.com/en/support/
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 2 years 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 (2 years) or resulting from user’s
fault, repair service fees will be charged and the product will be replaced at user’s expense.
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9 Precaution and Exemption from Liability
9.1 Precaution
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.
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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9.2 Exemption from Liability
9.2.1 English version
In no event shall Sollae Systems Co., Ltd. and its distributors be liable for any damages
whatsoever (including, without limitation, damages for loss of profit, operating cost for
commercial interruption, loss of information, or any other financial loss) from the use or
inability to use the CSE-H21 even if Sollae Systems Co., Ltd. or its distributors have been
informed of such damages.
The CSE-H21 is not designed and not authorized for use in military applications, in
nuclear applications, in airport applications or for use in applications involving explosives,
or in medical applications, or for use in security alarm, or for use in a fire alarm, or in
applications involving elevators, or in embedded applications in vehicles such as but not
limited to cars, planes, trucks, boats, aircraft, helicopters, etc..
In the same way, the CSE-H21 is not designed, or intended, or authorized to test,
develop, or be built into applications where failure could create a dangerous situation that
may result in financial losses, damage to property, personal injury, or the death of people
or animals. If you use the CSE-H21 voluntarily or involuntarily for such unauthorized
applications, you agree to subtract Sollae Systems Co., Ltd. and its distributors from all
liability for any claim for compensation.
Sollae Systems Co., Ltd. and its distributors entire liability and your exclusive remedy shall
be Sollae Systems Co., Ltd. and its distributors option for the return of the price paid for, or
repair, or replacement of the CSE-H21.
Sollae Systems Co., Ltd. and its distributors disclaim all other warranties, either expressed
or implied, including, but not limited to, the implied warranties of merchantability and
fitness for a particular purpose, with respect to the CSE-H21 including accompanying
written material, hardware and firmware.
9.2.2 French version
Documentation
La documentation du boîtier CSE-H21 est conçue avec la plus grande attention. Tous les
efforts ont été mis en œuvre pour éviter les anomalies. Toutefois, nous ne pouvons garantir
que cette documentation soit à 100% exempt de toute erreur. Les informations présentes
dans cette documentation sont données à titre indicatif. Les caractéristiques techniques
peuvent changer à tout moment sans aucun préavis dans le but d'améliorer la qualité et les
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possibilités des produits.
Copyright et appellations commerciales
Toutes les marques, les procédés, les références et les appellations commerciales des
produits cités dans la documentation appartiennent à leur propriétaire et Fabricant respectif.
Conditions d’utilisations et limite de responsabilité
En aucun cas Sollae Systems Co., Ltd. ou un de ses distributeurs ne pourra être tenu
responsable de dommages quels qu'ils soient (intégrant, mais sans limitation, les
dommages pour perte de bénéfice commercial, interruption d'exploitation commerciale,
perte d’informations et de données à caractère commercial ou de toute autre perte
financière) provenant de l'utilisation ou de l'incapacité à pouvoir utiliser le boîtier CSE-H21,
même si Sollae Systems Co., Ltd. ou un de ses distributeurs a été informé de la possibilité
de tels dommages.
Le boîtier CSE-H21 est exclusivement prévu pour un usage en intérieur, dans un
environnement sec, tempéré (+10 °C à +40°C) et non poussiéreux. Le boîtier CSE-H21 n’est
pas prévu, ni autorisé pour être utilisé en extérieur, ni de façon embarquée dans des engins
mobiles de quelque nature que ce soit (voiture, camion, train, avion, etc…), ni en milieu
explosif, ni dans des enceintes nucléaires, ni dans des ascenseurs, ni dans des aéroports, ni
dans des enceintes hospitaliers, ni pour des applications à caractère médical, ni dans des
dispositifs de détection et d’alerte anti-intrusion, ni dans des dispositifs de détection et
d’alerte anti-incendie, ni dans des dispositifs d’alarme GTC, ni pour des applications
militaires.
De même, le boîtier CSE-H21 n’est pas conçu, ni destiné, ni autorisé pour expérimenter,
développer ou être intégré au sein d’applications dans lesquelles une défaillance de celui-ci
pourrait créer une situation dangereuse pouvant entraîner des pertes financières, des
dégâts matériel, des blessures corporelles ou la mort de personnes ou d’animaux. Si vous
utilisez le boîtier CSE-H21 volontairement ou involontairement pour de telles applications
non autorisées, vous vous engagez à soustraire Sollae Systems Co., Ltd. et ses distributeurs
de toute responsabilité et de toute demande de dédommagement.
En cas de litige, l'entière responsabilité de Sollae Systems Co., Ltd. et de ses distributeurs
vis-à-vis de votre recours durant la période de garantie se limitera exclusivement selon le
choix de Sollae Systems Co., Ltd. et de ses distributeurs au remboursement de votre
produit ou de sa réparation ou de son échange. Sollae Systems Co., Ltd. et ses distributeurs
CSE-H21 User Manual Ver. 2.4
Sollae Systems Co., Ltd.
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démentent toutes autres garanties, exprimées ou implicites.
Tous les boîtiers CSE-H21 sont testés avant expédition. Toute utilisation en dehors des
spécifications et limites indiquées dans cette documentation ainsi que les court-circuit, les
chocs, les utilisations non autorisées, pourront affecter la fiabilité, créer des
dysfonctionnements et/ou la destruction du boîtier CSE-H21 sans que la responsabilité de
Sollae Systems Co., Ltd. et de ses distributeurs ne puissent être mise en cause, ni que le
boîtier CSE-H21 puisse être échangé au titre de la garantie.
Rappel sur l’évacuation des équipements électroniques usagés
Le symbole de la poubelle barré présent sur le boîtier CSE-H21 indique que vous ne
pouvez pas vous débarrasser de ce dernier de la même façon que vos déchets courants.
Au contraire, vous êtes responsable de l’évacuation du boîtier CSE-H21 lorsqu’il arrive en
fin de vie (ou qu’il est hors d’usage) et à cet effet, vous êtes tenu de le remettre à un
point de collecte agréé pour le recyclage des équipements électriques et électroniques
usagés. Le tri, l’évacuation et le recyclage séparés de vos équipements usagés permettent
de préserver les ressources naturelles et de s’assurer que ces équipements sont recyclés
dans le respect de la santé humaine et de l’environnement. Pour plus d’informations sur les
lieux de collecte des équipements électroniques usagés, contacter votre mairie ou votre
service local de traitement des déchets.
CSE-H21 User Manual Ver. 2.4
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10 Revision History
Date
Ver.
Comments
Author
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
Oct.11.2010
1.8
○ Document style has been changed.
○ Hyperlink of technical support home page has been
changed.
○ The table of Specification has been modified.
Roy LEE
Aug.03.2011
1.9
○ Add description of serial options. (FIFO, Data frame
interval… etc)
Amy
KIM
CSE-H21 User Manual Ver. 2.4
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○ Update a screenshot of ezManager.
Jan.11.2012
2.0
○ Caution about service using of DynDNS has been
added
○ Descriptions of FIFO function has been deleted.
Peter
LEE
June.18.2012
2.1
○ Extend the warranty period to two years
○ Change description of network interface
○ Remove description about Memory, PPPoE and
DHCP
Peter
LEE
May.14.2013
2.2
○ Add related material
○ Add exemption from liability
Peter
LEE
Oct.28.2013
2.3
○ Modify current consumption
Peter
LEE
Jan.02.2014
2.4
○ Correct some expressions
○ Modify the description about ATC mode
○ Modify the description about UDP
Peter
LEE
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