Wiznet WIZ127SR User manual

WIZ127SR User’s Manual
(Version 1.11)
© 2013 WIZnet Co., Ltd. All Rights Reserved.
☞For more information, visit our website at http://www.wiznet.co.kr

WIZ127SR User’s Manual ii
Document Revision History
Date
Revision
Changes
2013-04-01
V1.00
Official Release
2013-07-04
V1.10
Add default setting value (4.4)
Add CTS/RTS timing diagram (4.5)
Modify some miss types
Update Pin-Description(2.1)
Update EVB-Schematic(2.4.1)
2013-09-25
V1.11
Add sentence “RS232 Level”(4.5)
Information in this document is belived to be accurate and reliable. However, WIZnet
does not give any representations or warranties, expressed or implied, as to the
accuracy or completeness of such information and shall have no liability for the
consequences of use of such information.
WIZnet reserves the right to make changes to information published in this document,
including without limitation specifictions and product descriptions, at any time and
without notice. This document supersedes and replaces all information supplied prior to
the publication hereof.

WIZ127SR User’s Manual iii
COPYRIGHT NOTICE
Copyright 2013WIZnet Co., Ltd. All Rights Reserved.
Contact Information
-WIZnet US : [e-mail] / [e-mail]
-WIZnet HK : [e-mail]
-WUZnet EU : [e-mail]
-WIZnet HQ : [e-mail] / [e-mail]
For more information, visit our website at http://www.wiznet.co.kr

WIZ127SR User’s Manual iv
Table of Contents
1. INTRODUCTION..........................................................................................................................1
1.1. KEY FEATURE...............................................................................................................................1
2. HARDWARE SPECIFICATIONS................................................................................................2
2.1. PIN ASSIGNMENTAND DESCRIPTION ...........................................................................................2
2.2. DIMENSION ...................................................................................................................................4
2.3. ELECTRICAL CHARACTERISTICS ..................................................................................................5
2.3.1. Absolute Maximum Rating................................................................................................ 5
2.3.2. DC Characteristics............................................................................................................. 5
2.3.3. POWER DISSIPATION ..................................................................................................... 5
2.4. APPLICATION SCHEMATICS...........................................................................................................6
2.4.1. WIZ127SR-BASE...............................................................................................................6
2.4.2. RS485/422..........................................................................................................................7
3. PROGRAMMERS’ GUIDE ..........................................................................................................8
3.1. SERIAL COMMANDS......................................................................................................................8
3.1.1. Serial Command Format...................................................................................................8
3.1.2. Reply Code.........................................................................................................................8
3.1.3. Command Code................................................................................................................. 8
3.2. DATA MODE AND COMMAND MODE.............................................................................................17
3.2.1. Data mode.........................................................................................................................17
3.2.2. Serial Command mode ...................................................................................................17
3.2.3. How to switch the mode..................................................................................................17
3.2.4. How to configure WIZ127SR with a whole data..........................................................17
3.2.4.1. Command Frame Format ...........................................................................................18
3.2.4.2. Reply Frame Format....................................................................................................19
3.2.4.3. Example.........................................................................................................................20
3.3. HOW TO GET THE SOCKET STATUS.............................................................................................21
3.4. HOW TO USE EXTRA GPIO PINS................................................................................................21
4. HOW TO CONFIGURE WIZ127SR..........................................................................................22
4.1. CONFIGURING WITH UDPBROADCASTINGAND WIZ127SR CONFIGURATION TOOL...............22
4.1.1. Network Configurations...................................................................................................22
4.1.2. Serial Configuration......................................................................................................... 25
4.1.3. Option Configuration........................................................................................................ 29
4.2. CONFIGURING WITH WEB BROWSER..........................................................................................31
4.3. CONFIGURING WITH TELNET ......................................................................................................32
4.4. FACTORY DEFAULT VALUES OF WIZ127SR..............................................................................34
4.5. HARDWARE FLOW CONTROL DIAGRAM (RS232 LEVEL)..........................................................36
4.5.1. CTS/RTS Mode Timing Diagram...................................................................................36
4.5.2. DTR/DSR mode Timing Diagram.................................................................................. 37
4.5.3. RTS Only mode Timing Diagram...................................................................................38
5. HOW TO UPLOAD A NEW FIRMWARE.................................................................................39
6. QUICK INSTALLATION AND TEST ........................................................................................ 42
6.1. SYSTEM CONFIGURATION ..........................................................................................................42
6.2. TESTING PROCEDURE................................................................................................................42
6.2.1. Hardware Connection...................................................................................................... 42
6.2.2. Module Configuration......................................................................................................42
7. WARRANTY...............................................................................................................................47

WIZ127SR User’s Manual v
Figures
FIGURE 1PIN ASSIGNMENT .........................................................................................................................2
FIGURE 2DIMENSION...................................................................................................................................4
FIGURE 3WIZ127SR BASE BOARD SCHEMATIC.........................................................................................6
FIGURE 4REFERENCE SCHEMATIC FOR INTERFACING TO RS485/422......................................................7
FIGURE 5. CONFIGURATION TOOL (NETWORK CONFIGURATION).............................................................22
FIGURE 6. CONFIGURATION TOOL (SERIAL CONFIGURATION)..................................................................25
FIGURE 7. CONFIGURATION TOOL (OPTION CONFIGURATION).................................................................29
FIGURE 8. CTS SIGNALTIMING DIAGRAM UNDER CTS/RTS MODE.........................................................36
FIGURE 9. RTS SIGNAL TIMING DIAGRAM UNDER CTS/RTS MODE.........................................................36
FIGURE 10. DTR SIGNAL TIMING DIAGRAM UNDER DSR/DTR MODE.......................................................37
FIGURE 11. DSR SIGNAL TIMING DIAGRAM UNDER DSR/DTR MODE......................................................37
FIGURE 12. RTS SIGNALTIMING DIAGRAM UNDER RTS ONLY MODE ......................................................38
FIGURE 13. CONFIGURATION TOOL...........................................................................................................39
FIGURE 14. OPEN DIALOG BOX FOR UPLOADING.......................................................................................40
FIGURE 15. FIRMWARE UPLOADING WINDOW............................................................................................41
FIGURE 16. COMPLETE UPLOADING..........................................................................................................41

WIZ127SR User’s Manual vi
Tables
TABLE 1PIN DESCRIPTION...........................................................................................................................3
TABLE 2ABSOLUTE MAXIMUM RATING........................................................................................................5
TABLE 3DC CHARACTERISTIC ....................................................................................................................5
TABLE 4POWER DISSIPATION......................................................................................................................5
TABLE 5. SERIAL CONFIGURATION FRAME FORMAT ....................................................................................8
TABLE 6. SERIAL CONFIGURATION REPLY FRAME FORMAT.........................................................................8
TABLE 7. SERIAL CONFIGURATION STX &ETX..........................................................................................8
TABLE 8. SERIAL CONFIGURATION REPLY CODE.........................................................................................8
TABLE 9. HARDWARE CONFIGURATION FRAME FORMAT...........................................................................18
TABLE 10. HARDWARE CONFIGURATION COMMAND CODE.......................................................................18
TABLE 11. HARDWARE CONFIGURATION PARAMETER DESCRIPTIONS......................................................19
TABLE 12. HARDWARE CONFIGURATION REPLY FRAME FORMAT .............................................................19
TABLE 13. HARDWARE CONFIGURATION ENTRANCE MESSAGE ...............................................................20

WIZ127SR User’s Manual
1
1. Introduction
WIZ127SR is a 2 ports gateway module that converts RS-232 protocol into TCP/IP protocol.
This module enables remote gauging, remote management of the device through the network
based on the Ethernet and the TCP/IP by connecting to existing equipment with RS-232 serial
interface. In other words, WIZ127SR is a protocol converter that transmits the data sent by
serial equipment as TCP/IP data type or vice versa.
1.1. Key Feature
-Plug & Play Type Serial to Ethernet Gateway module
Adds Network Function Simply and Quickly
Provides Firmware Customization
-Hardware compatible with WIZ100SR
-2port serial to Ethernet
supports RS-232
supports RS-422/485 by adding RS-232 to RS-422/485 converter
-Supports TCP & UDP communication
-Supports DHCP, DNS, NTP
-Easy configuration
Web, Telnet, Configuration Tool & Serial Command
-GPIO Extendable (Max. 10GPIOs), by firmware customization
-10/100 Ethernet & Max.921,600bps Serial Interface
-Supports Static IP, DHCP, PPPoE
-Supports DNS function
-RoHS compliant

WIZ127SR User’s Manual
2
2. Hardware Specifications
2.1. Pin Assignment and Description
Figure 1 Pin Assignment
Pin
Location
Pin name
Description
I/O
Attribute
J1.1
VDD3V3
3.3V Power Supply
J1.2
RESET
Reset (Active High)
Input
-
J1.3
GND
Ground
J1.4
UART1_TX
TX Data Output for UART1
We recommend to add
external pull-up resistor on
UART1_TX.
Output
J1.5
UART1_RTS
Request To Send for UART1
Output
J1.6
PB0
GPIO pin
Input/Output
CMOS/TTL/5V tolerant Input
J1.7
GND
Ground
J1.8
UART1_RX
RX Data Input for UART1
Input
J1.9
UART1_CTS
Clear To Send for UART1
Input
J1.10
PB1
GPIO pin
Input/Output
CMOS/TTL/5V tolerant Input
J1.11
GND
Ground
J1.12
(*)STATUS1
High: Not connected
Low: Connected
Input/Output
CMOS/TTL/5V tolerant Input
WIZ127SR check whether this
pin is asserted low as input pin
during booting If it is low,
WIZ127SR enter into Hardware
configuration mode. Otherwise,
It enters into normal mode
J2.1
VDD3V3A
Analog 3.3V Output
J2.2
RXIN
Ethernet Differential Input-
Input
-
J2.3
RXIP
Ethernet Differential Input+
Input
-
J2.4
GND
J2.5
TXON
Ethernet Differential Output-
Output
-
J2.6
TXOP
Ethernet Differential Output+
Output
-
J2.7
GND
Ground
J2.8
LINKLED_M0
Ethernet Link LED
Output
-
J2.9
PB5
GPIO pin
Input/Output
CMOS/TTL/5V tolerant Input
PB0
PB1
VDD3V3A
RXIP
RXIN
TXOP
TXONUART1_RTS
LINKLED_M0
PB5
UART1_TX
STATUS1
UART1_CTS
UART1_RX
SPDLED_M1
FDXLED_M2 VDD3V3
VDD3V3
STATUS2
PB11
UART2_RX
UART2_TX
UART2_RTS
UART2_CTS
PC15
PB15
PB14
PB13
PB12
PC14 J3
2.0mm HEADER 12x1
1
2
3
4
5
6
7
8
9
10
11
12
J1
2.0mm HEADER 12x1
1
2
3
4
5
6
7
8
9
10
11
12
J2
2.0mm HEADER 12x1
1
2
3
4
5
6
7
8
9
10
11
12
RESET

WIZ127SR User’s Manual
3
J2.10
SPDLED_M1
Ethernet Speed LED
Output
-
J2.11
FDXLED_M2
Ethernet Full-duplex LED
Output
-
J2.12
VDD3V3
3.3V Power Supply
J3.1
PC14
Input/Output
CMOS/TTL/5V tolerant Input
J3.2
PC15
Input/Output
CMOS/TTL/5V tolerant Input
J3.3
UART2_CTS
Clear To Send for UART2
Input
CMOS/TTL/5V tolerant Input
J3.4
UART2_RTS
Request To Send for UART2
Output
CMOS/TTL/5V tolerant Input
J3.5
UART2_TX
TX Data Output for UART2
We recommend to add
external pull-up resistor on
UART2_TX.
Output
CMOS/TTL/5V tolerant Input
J3.6
UART2_RX
RX Data Input for UART2
Input
CMOS/TTL/5V tolerant Input
J3.7
STATUS2
High: Not connected
Low: Connected
Output
CMOS/TTL/5V tolerant Input
J3.8
PB11
Factory Reset (Active Low)
Input
CMOS/TTL/5V tolerant Input
Factory Reset is done if it is
asserted low during MCU
booting.
J3.9
PB12
GPIO pin
Input/Output
CMOS/TTL/5V tolerant Input
J3.10
PB13
GPIO pin
Input/Output
CMOS/TTL/5V tolerant Input
J3.11
PB14
GPIO pin
Input/Output
CMOS/TTL/5V tolerant Input
J3.12
PB15
GPIO pin
Input/Output
CMOS/TTL/5V tolerant Input
(*) This pin can be used for H/W Trigger (Active Low).
Table 1 Pin Description

WIZ127SR User’s Manual
4
2.2. Dimension
Figure 2 Dimension

WIZ127SR User’s Manual
5
2.3. Electrical Characteristics
2.3.1. Absolute Maximum Rating
Symbol
Parameter
Rating
Unit
VDD
DC Supply voltage
-0.5 to 3.63
V
VIN
DC Input voltage
-0.5 to 3.63
V
IIN
DC Input current
5
mA
TOP
Operating temperature
0 to 70
℃
TSTG
Storage temperature
TBD
℃
Table 2 Absolute Maximum Rating
2.3.2. DC Characteristics
Symbol
Parameter
Test Conditon
Min
Typ
Max
Unit
VDD
DC Supply voltage
Junction
temperature
is from
-55℃to 125℃
2.97
3.6
V
VIH
High level input voltage
2.0
3.6
V
VIL
Low level input voltage
0.3
0.8
V
VOH
High level output voltage
2.4
V
VOL
Low level output voltage
0.4
V
II
Input Current
VIN = VDD
5
μA
Table 3 DC Characteristic
2.3.3. POWER DISSIPATION
Test Condition(VCC3.3V, Temperature 25℃)
Condition
Min
Typ
Max
Unit
100M Link
-
200
215
mA
10M Link
-
147
162
mA
Loss Link
-
158
173
mA
100M Transmitting
-
200
215
mA
10M Transmitting
-
147
162
mA
Table 4 Power Dissipation

WIZ127SR User’s Manual
6
2.4. Application Schematics
2.4.1. WIZ127SR-BASE
Figure 3 WIZ127SR Base board schematic
UART1
UART2
RJ45 W\MAGNET
POWER
VDD3V3
PB11
C20
0.1uF
R25
10K
SW6
TACT SW
1
2
4
3R28 100R
R11 0R
ETHERNET STATUS
NC
R1
330R
VDD3V3
D1
LED
R2
330R
R3
330R
D2
LED
PB5
D3
LED
FDXLED_M2
SPDLED_M1
R8
330R
LINKLED_M0
D4
LED
VDD3V3
STATUS2
D8
LED
R20
330R D9 LED
CONNECTED STATUS/HW TRIGGER
R19
330R
LINKLED_M0
R10 330R
C2
0.1uF
R9 330R
RXIN
RXIP
R6 49.9R R7 49.9R
TXON
TXOP P1
RB1-105BAG1A
TD+
1
TD-
2
TCT
3
NC1
4
NC2
5
RCT
6
RD+
7
RD-
8
L1+
12 L2-
11 L3+
10 L4-
9
CH_GND1
13
CH_GND2
14
R4 49.9R R5 49.9R
SPDLED_M1
VDD3V3A
VDD3V3
C3
0.1uF
C1 0.1uF
NC
R22 0R
R21 0R
R24 0R
R23 0R
UART2_TX
UART2_CTS
UART2_RX
UART2_RTS
RESET
R16
10K
C10
0.1uF
SW4
TACT SW
1
2
4
3
R17 0R
NC
VDD3V3 C9
0.1uF
VDD3V3
RESET
U2
SN74LVC1G14
NC
1
A
2
GND
3
Y4
VCC 5
TP2
CONNECTOR
TP1
VDD3V3A
PB1
PB0
TP3
RXIP
RXIN
PB5
TXOP
TXON
UART1_TX
UART1_RTS
LINKLED_M0
SPDLED_M1
STATUS1
UART1_CTS
UART1_RX
TP4 FDXLED_M2
VDD3V3
UART2_TX
UART2_RTS
UART2_CTS
VDD3V3
PB12
STATUS2
PB11
UART2_RX
PC14
PC15
PB15
PB14
PB13
J3
2.0mm HEADER 12x1
1
2
3
4
5
6
7
8
9
10
11
12
J1
2.0mm HEADER 12x1
1
2
3
4
5
6
7
8
9
10
11
12
J2
2.0mm HEADER 12x1
1
2
3
4
5
6
7
8
9
10
11
12
2.0 Pitch2.0 Pitch
RESET
2.0 Pitch
VDD3V3
RS232_RTS1
RS232_TX1
GND
RS232_CTS1
RS232_RX1
P2
DB9_MALE-RA
5
9
4
8
3
7
2
6
1
10 11
U1
SP3232EUEY-L
C1+
1
V+ 2 C1-
3
C2+
4
C2-
5V- 6
TOUT2 7
TOUT1 14
ROUT2
9RIN2 8
TIN2
10 TIN1
11
ROUT1
12 RIN1 13
GND 15
VCC 16
C6 0.1uF
C5 0.1uF
C4 0.1uF
C7 0.1uF
C8 0.1uF
UART1_CTS
VDD3V3
RS232_RTS2
RS232_TX2
PB14
RS232_CTS2
RS232_RX2
SW2
SLD-SW
11
22
33
VDD3V3
GND
SW3
SLD-SW
11
22
33
VDD3V3
R26 10K
R12 10K
P3
DB9_MALE-RA
5
9
4
8
3
7
2
6
1
10 11
R15 10K
U3
SP3232EUEY-L
C1+
1
V+ 2 C1-
3
C2+
4
C2-
5V- 6
TOUT2 7
TOUT1 14
ROUT2
9RIN2 8
TIN2
10 TIN1
11
ROUT1
12 RIN1 13
GND 15
VCC 16
R27 10K
C12 0.1uF
C11 0.1uF
C13 0.1uF
D6 LED
PB15
C15 0.1uF
D5 LED
PB13
PB12
C14 0.1uF
R14 330R
GPIO IN/OUT
VDD3V3
J5
2.54mm HEADER 6x1
1
2
3
4
5
6
R13 330R
UART2_TX
UART2_CTS
UART2_RX
UART1_TX
VDD3V3
UART2_RTS
UART1_RX
UART1_RTS
UART2_TX
R30
10K R29 10K
UART1_TX
VDD3V3
M2
TH3.5
1
M1
TH3.5
1
M3
TH3.5
1
M4
TH3.5
1
FACTORY RESET
SW1
SLD-SW
11
22
33
NC
VDD3V3
VDD3V3A
TP8
C19
10uF/16V
TP7
D7
LED
3V3_IN
R18
330R
L1
HH-1M1608-121JT
SW5
TG-SW
1
1
2
2
3
3
J4
DC JACK
1
2
3C18
10uF/16V
C16
10uF/16V
5V_IN U4
AME8815BEGT330Z/SOT-223
GND 1
VOUT 2
VIN
3VTAB 4
C17
10uF/16V
TP6
TP5
L2
HH-1M1608-121JT
STATUS1

WIZ127SR User’s Manual
7
2.4.2. RS485/422
Figure 4 Reference schematic for interfacing to RS485/422
SP3485
RO
1
RO
2
DE
3
DI
4GND 5
A6
B7
VCC 8
UART2_TX
UART2_RX
UART2_RTS
VDD3V3
0.1uF
120R
485+
485-
HEADER 2
1
2
RS485 Example Circuit
VDD3V3
0.1uF
485_TX-
485_TX+
UART2_RX
UART2_TX
SP3701E
VCC
1
RO
2
DI
3
GND
4Y5
Z6
B7
A8485_RX+
120R
485_RX-
HEADER 4
1
2
3
4
RS422 Example Circuit

WIZ127SR User’s Manual
8
3. Programmers’Guide
3.1. Serial Commands
3.1.1. Serial Command Format
It is possible to configure WIZ127SR by using serial command. By inputting specified 3
characters you can enter into the configuration mode. The characters can be defined at the
Configuration Tool.
< Frame Format >
Command Frame format
Descriptor
STX
Command code
Parameter
ETX
Length(bytes)
1
2
Variable
1
Table 5. Serial Configuration Frame format
Reply Frame format
Descriptor
STX
Reply code
Parameter
ETX
Length(bytes)
1
1
Variable
1
Table 6. Serial Configuration Reply Frame format
STX & ETX
Setting
Comments
STX
‘<’ : Hex = 3Ch
ETX
‘>’ : Hex = 3Eh
Table 7. Serial Configuration STX & ETX
3.1.2. Reply Code
Reply
Comments
S
Command was successful
F
Command failed
0
Invalid STX
1
Invalid command
2
Invalid parameter
3
Invalid ETX
E
Enter Serial Command Mode
Table 8. Serial Configuration Reply Code
3.1.3. Command Code
Command
Category
Description
WI
Format
<WIxxx.xxx.xxx.xxx>
Meaning
Set Local IP
ex) <WI192.168.11.133>
Response
<S>
RI
Format
<RI>

WIZ127SR User’s Manual
9
Meaning
Get the current WIZ127SR’s Local IP address
Its response format is like below.
<S[IP Addr]>
[IP Addr] : Server’s IP address in a dotted decimal format
ex) <RI>
Response
<S192.168.0.100>
WS
Format
<WSxxx.xxx.xxx.xxx>
Meaning
Set Subnet Mark
ex) <WS255.255.255.0>
Response
<S>
RS
Format
<RS>
Meaning
Get the current WIZ127SR’s Subnet Mask
Its response format is like below.
<S[Subnet]>
[Subnet] : Server’s IP address in a dotted decimal format
ex) <RS>
Response
<S255.255.255.0>
WG
Format
<WGxxx.xxx.xxx.xxx>
Meaning
Set Gateway Address
ex) <WG192.168.11.1>
Response
<S>
RG
Format
<RG>
Meaning
Get the current WIZ127SR’s Gateway address
Its response format is like below.
<S[IP Addr]>
[IP Addr] : Server’s IP address in a dotted decimal format
ex) <RG>
Response
<S192.168.0.1>
WP
Format
<WPxxxxx>
Meaning
Set Local port number
ex) <WP35000>
Response
<S>
RP
Format
<RP>
Meaning
Get the current WIZ127SR’s Local port number
Its response format is like below.
<S[Port]>
[Port] : Server’s IP address in a dotted decimal format
ex) <RP>
Response
WD
Format
<WDx>
Meaning
Set the method of setting WIZ127SR’s IP address
Parameter’s Value
Meaning

WIZ127SR User’s Manual
10
0
Static mode
1
DHCP mode
2
PPPoE mode
ex) <WD0> or <WD1>
Response
<S>
RD
Format
<RD>
Meaning
Get the current WIZ127SR’s method setting its IP address
Its response format is like below.
<S[Mode]>
[Mode] : Server’s IP address in a dotted decimal format
ex) <RD>
Response
WM
Format
<WMx>
Meaning
Set the operation mode of a TCP socket
Parameter’s
Value
Meaning
Remarks
0
TCP Client
The TCP socket try to connect to the
peer until the connection is established
1
TCP Mixed
This mode is the same to TCP Server
mode at first, but While any connection
is not established, if WIZ127SR get
any data via UART then WIZ127SR
make TCP socket be a TCP Client
socket and try to connect to the
specified peer system.
2
TCP Server
The TCP socket is in Listen mode
waiting for a request of connection
from any peer system.
ex) <WM0>
Response
<S>
RM
Format
<RM>
Meaning
Get the current data communication socket’s operation mode
Its response format is like below.
<S[Mode]>
[Mode] : Server’s IP address in a dotted decimal format
ex) <RM>
Response
WK
Format
<WKx>
Meaning
Set the protocol of the communication socket with one of two mode.
Parameter’s Value
Meaning
0
TCP
1
UDP
ex) <WK0>
Response
<S>
RK
Format
<RK>

WIZ127SR User’s Manual
11
Meaning
Get the current data communication socket’s protocol type.
Its response format is like below.
<S[Protocol]>
[Protocol] : Server’s IP address in a dotted decimal format
ex) <RK>
Response
WB
Format
<WB[b][d][p][f]>
Meaning
Configure UART with four parameters
[b], [d], [p] and [f] are a byte parameters, and those have the
meaning as below
Parameter
Value
Meaning
[b] : baud rate
c
b
a
1
2
3
4
5
6
7
8
921,600 bps
460,800 bps
230,400 bps
115,200 bps
57,600 bps
38,400 bps
19,200 bps
9,600 bps
4,800 bps
2,400 bps
1,200 bps
[d] : data bits size
7
8
9
7 bits
8 bits
9 bits
[p] : parity
0
1
2
No Parity
Odd Parity
Even Parity
[f] : flow control
0
2
3
4
None
RTS/CTS
DSR/DTR
RTS Only (For RS485)
ex) <WB1800> => 115200, 8 bits, no parity, no flow control
Response
<S>
RB
Format
<RB>
Meaning
Get the current configuration information of WIZ127SR’s serial
interface.
Its response format is like below.
<S[baud rate][data size][parity][flow control]>
ex) <RB>
Response
<S1800>
WT
Format
<WT[y]>
Meaning
Set whether serial command will be allowed, or not
[y] = 0 : Disable
[y] = 1 : Enable
ex) <WT1>
Response
<S>
RT
Format
<RT>
Meaning
Get the current setting of serial command method

WIZ127SR User’s Manual
12
Its response format is like below.
<S[Option]>
[Option] : Server’s IP address in a dotted decimal format
ex) <RT>
Response
<S1>
WU
Format
<WU[y]>
Meaning
Set Whether DNS service will be allowed
[y] = 0 : Not use
[y] = 1 : Use
ex) <WU1>
Response
<S>
RU
Format
<RU>
Meaning
Get whether DNS mode is enabled or not
Its response format is like below.
<S[flag]>
[flag] : 0 = Not Use, 1 = Use
ex) <RU>
Response
<S1>
WE
Format
<WE[ch][ch][ch]>
Meaning
Set character string using for Software trigger in order to enter
serial command mode.
[ch] is a ASCII character represented in its hexadecimal format. For
example, if user wants use ‘A’ as [ch] then user should input its
ASCII code in hexadecimal format, ‘4’ and ‘1’, not ‘A’.
ex)If character string for software trigger is “+++” then
<WE2B2B2B>
Response
<S>
RE
Format
<RE>
Meaning
Get the current character string for software trigger to enter the
serial command mode.
Its response format is like below.
<S[ch1][ch2][ch3]>
[IP Addr] : Server’s IP address in a dotted decimal format
ex) <RE>
Response
<S2B2B2B>
WX
Format
<WX[IP Addr]>
Meaning
Set Server’s IP address to connect when the data socket is defined
as Client mode or Mixed mode. If user defined the data socket as a
Server mode, WIZ127SR don’t care this Server’s IP address.
[IP Addr] : Server’s IP address in a dotted decimal format
ex) <WX192.168.11.144>
Response
<S>
RX
Format
<RX>
Meaning
Get the current Server’s IP address

WIZ127SR User’s Manual
13
Its response format is like below.
<S[IP Addr]>
[IP Addr] : Server’s IP address in a dotted decimal format
ex) <RX>
Response
<S192.168.0.115>
WN
Format
<WN[port]>
Meaning
Set Server’s port number to connect when the data socket is defined
as Client mode or Mixed mode.
[port] : Server’s port number in a decimal format.
Its range is 0 to 65535
ex) <WN5000>
Response
<S>
RN
Format
<RN>
Meaning
Get the current Server’s Port number
Its response format is like below.
<S[Port number]>
[IP Addr] : Server’s IP address in a dotted decimal format
ex) <RN>
Response
<S5000>
WR
Format
<WR>
Meaning
Restart WIZ127SR
Some commands need reboot of WIZ127SR in order that those
command affect to WIZ127SR’s configuration to operate properly.
So, we recommend you do use this command after all command you
issued, to guarantee WIZ127SR operate successfully.
ex) <WR>
Response
<S>
WV
Format
<WV[IP addr]>
Meaning
Set Domain Name Server’s IP address
If you want to use Server information in Domain name, not IP
address, then you should set Domain Name Server’s IP address
using this command. And the Domain Name Server’s IP address
which you entered should be valid and operate DNS query
successfully.
[IP Addr] : Server’s IP address in a dotted decimal format
<WV8.8.8.8>
Response
<S>
RV
Format
<RV>
Meaning
Get the current Domain Name Server IP address
Its response format is like below.
<S[IP Addr]>
[IP Addr] : Server’s IP address in a dotted decimal format
ex) <RV>
Response
<S8.8.8.8>
WW
Format
<WW[Domain name]>

WIZ127SR User’s Manual
14
Meaning
Set Domain Name which you connect to.
This information is meaningful as if you want use the data socket as
Client mode or Mixed mode and set DNS enabled and set a proper
DNS IP address.
If one of them isn’t set properly, despite you use this command, you
can’t get a good response.
[Domain name] : Domain name in string type
ex) <WWwww.google.com>
Response
<S>
RW
Format
<RW>
Meaning
Get the current Domain Name set in WIZ127SR
Its response format is like below
<S[Domain Name]>
[Domain Name]
Response
<Swww.wiznet.co.kr>
WY
Format
<WY[ID]>
Meaning
Set ID for PPPoE authentication
Response
<S>
RY
Format
<RY>
Meaning
Get the current ID for PPPoE
Its response format is like below
<S[ID]>
[ID] :
Response
<Sadmin>
WZ
Format
<WZ[Passwd]>
Meaning
Set Password for PPPoE authentication
Response
<S>
RZ
Format
<RZ>
Meaning
Get the current password for PPPoE
Its response format is like below.
<S[Passwd]>
[Passwd] : Server’s IP address in a dotted decimal format
ex) <RZ>
Response
<Sadmin>
OC
Format
<OC[ch]>
Meaning
Set a character delimiter1for making a ethernet data block in
Hexadecimal format.
[ch] : character information.
Default value is 00. If this value is 00, it means Character
Delimiter disabled
1
In normal, a serial device send data in chunk. Some device never expects those data chunk would be divided more
than two pieces. But WIZ127SR handle data from serial interface byte by byte, in other word WIZ127SR check its serial
buffer having data from serial interface and there are some data in that buffer, then it make a ethernet packet with those
data and send that. But because the peer system expects all data chunk, that consider those data was broken and
discard those.
So, to avoid this fault, WIZ127SR provides three scheme to handle serial data chunk by chunk. Those are character
delimiter, size delimiter and time delimiter.