Jinan USR IOT Technology WIFI232-A User manual

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USR-WIFI232-
USR-WIFI232-
USR-WIFI232-
USR-WIFI232- A/B/C
A/B/C
A/B/C
A/B/C
Embedded
Embedded
Embedded
Embedded WiFi
WiFi
WiFi
WiFi Module
Module
Module
Module User
User
User
User Manual
Manual
Manual
Manual
Version ：V5.0.8
Remarks: This module is applicable to USR-WIFI232-A/B/C and its derivatives, for example USR-
WIFI232-2/6 1 0 . For USR-WIFI232-G/T /S , please refer to the corresponding document.
Note: this article is based on the firmware version for V5.01.01 and above version of the module,
if the version is lower than this version, some function is not supported.

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Table
Table
Table
Table Of
Of
Of
Of Contents
Contents
Contents
Contents
1 Quick Start .................................................................................................................................................. 7
1.1 Hardware connect .......................................................................................................................... 7
1.2 Network connection ........................................................................................................................ 7
1.3 communication test ........................................................................................................................ 9
2 Product Overview ...................................................................................................................................... 9
2.1 General Description ..................................................................................................................... 10
2.2 Device Features ........................................................................................................................... 10
2.3 Device Paremeters ....................................................................................................................... 11
2.4 Key Application ............................................................................................................................. 11
2.5 Package Information .................................................................................................................... 12
2.5.1 Recommended Reflow Profile ........................................................................................ 12
2.5.2 Device Handling Instruction (Module IC SMT Preparation) ........................................ 12
2.5.3 Shipping Information ......................................................................................................... 13
3 Hardware Introduction ............................................................................................................................ 13
3.1 Pins Definition ............................................................................................................................... 13
3.1.1 USR-WIFI232-A/B Pins Definition .................................................................................. 13
3.1.2 USR-WIFI232-Ca/Cb Pins Definition ............................................................................. 15
3.2 Mechanical Size ........................................................................................................................... 16
3.2.1 USR-WIFI232-A/B ............................................................................................................. 16
3.2.2 USR-WIFI232-Ca/Cb ........................................................................................................ 17
3.3 Antenna .......................................................................................................................................... 18
3.3.1 On-board Chip Antenna ................................................................................................... 18
3.3.2 External Antenna ............................................................................................................... 18
3.4 Evaluation Kit ................................................................................................................................ 19
3.5 Hardware Reference Design ...................................................................................................... 21
3.5.1 Hardware Typical Application .......................................................................................... 21
3.5.2 10/100M Ethernet Interface ............................................................................................. 22
3.5.2.1 Ethernet Connection with Transformer ............................................................... 22
3.5.2.2 Ethernet Connection without Transformer ......................................................... 23
3.5.3 UART Interface .................................................................................................................. 25
3.5.4 Power Interface ................................................................................................................. 25
4 Modules Function Description ............................................................................................................... 25
4.1 User configuration process ......................................................................................................... 26
4.2 Working mode ............................................................................................................................... 26
4.2.1 Transparent Mode ............................................................................................................. 26
4.2.2 Serial command mode ..................................................................................................... 27
4.2.3 GPIO mode ........................................................................................................................ 28
4.2.4 HTTPD Client mode ......................................................................................................... 28
4.3 Wireless Networking .................................................................................................................... 29
4.3.1 STA ...................................................................................................................................... 30
4.3.2 AP ........................................................................................................................................ 30
4.3.3 AP+STA .............................................................................................................................. 31
4.4 Ethernet Interface Communication ............................................................................................ 32

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4.4.1 USR-WIFI232-A/B/C Ethernet Interface Networking (As AP) .................................... 32
4.4.2 USR-WIFI232-A/B/C Ethernet Interface Networking (As STA, N-Ver) ...................... 33
4.4.3 USR-WIFI232-A/B/C Ethernet Interface Networking (As STA, Z-Ver) ...................... 34
4.5 WI-FI parameter setting ............................................................................................................... 34
4.5.1 Auto- Frequency Function ............................................................................................... 34
4.5.2 Security ............................................................................................................................... 34
4.5.3 Search Function for STA .................................................................................................. 35
4.5.4 Address Binding ................................................................................................................ 35
4.6 UART Frame Scheme ................................................................................................................. 35
4.6.1 UART Free-Frame ............................................................................................................ 35
4.6.2 UART Auto-Frame ............................................................................................................ 36
4.7 Network Setting ............................................................................................................................ 36
4.7.1 Socket A ............................................................................................................................. 36
4.7.2 Socket B ............................................................................................................................. 37
4.8 New function ................................................................................................................................. 37
4.8.1 TCP password authentication ......................................................................................... 37
4.8.2 Registered Package ID/MAC .......................................................................................... 37
4.8.3 Self-adaption Baudrate .................................................................................................... 38
4.8.4 WEB IO ............................................................................................................................... 38
4.8.5 Keepalive ............................................................................................................................ 38
4.8.6 Multiple STA parameters .................................................................................................. 38
4.8.7 Websocket ......................................................................................................................... 39
4.8.8 Fast access Wi-Fi(usr-link) .............................................................................................. 39
4.9 Palmodic Signal ............................................................................................................................ 41
4.10 Parameters Configuration ......................................................................................................... 41
4.11 Firmware Upgrade ..................................................................................................................... 42
5 Web Accessing and AT+instruction set ................................................................................................ 43
5.1 Configuration via Web Accessing .............................................................................................. 43
5.1.1 Open Web Management Interface ................................................................................. 43
5.1.2 Quick Configure ................................................................................................................ 44
5.1.3 Mode Selection Page ....................................................................................................... 44
5.1.4 AP Interface Setting Page ................................................................................................ 45
5.1.5 STA Interface Setting Page ............................................................................................. 45
5.1.6 Application Setting Page .................................................................................................. 46
5.1.7 Ethernet Setting ................................................................................................................ 47
5.1.8 HTTPD Client Mode ......................................................................................................... 48
5.1.9 WEB IO ............................................................................................................................... 48
5.1.10 Advanced Page ............................................................................................................... 49
5.1.11 Device Management Page ............................................................................................ 49
5.2 AT+instruction Introduction ......................................................................................................... 50
5.2.1 Configuration Mode .......................................................................................................... 50
5.2.1.1 Switch to Configuration Mode .............................................................................. 51
5.2.2 AT+ Instruction Set Overview .......................................................................................... 51
5.2.2.1 Instruction Syntax Format .................................................................................... 53

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5.2.2.2 AT+ Instruction Set ................................................................................................ 54
5.2.2.2.1 AT+E ............................................................................................................. 56
5.2.2.2.2 AT+ENTM .................................................................................................... 56
5.2.2.2.3 AT+NETP ..................................................................................................... 56
5.2.2.2.4 AT+UART ..................................................................................................... 57
5.2.2.2.5 AT+UARTF .................................................................................................. 57
5.2.2.2.6 AT+UARTFT ................................................................................................ 57
5.2.2.2.7 AT+UARTFL ................................................................................................ 58
5.2.2.2.8 AT+TMODE ................................................................................................. 58
5.2.2.2.9 AT+WMODE ................................................................................................ 58
5.2.2.2.10 AT+WSKEY ............................................................................................... 59
5.2.2.2.11 AT+WSSSID .............................................................................................. 59
5.2.2.2.12 AT+ WSLK ................................................................................................. 59
5.2.2.2.13 AT+WEBU ................................................................................................. 60
5.2.2.2.14 AT+WAP .................................................................................................... 60
5.2.2.2.15 AT+WAKEY ............................................................................................... 61
5.2.2.2.16 AT+HIDESSID ........................................................................................... 61
5.2.2.2.17 AT+MSLP ................................................................................................... 62
5.2.2.2.18 AT+WSCAN ............................................................................................... 62
5.2.2.2.19 AT+ TCPLK ................................................................................................ 62
5.2.2.2.20 AT + TCPDIS ............................................................................................. 62
5.2.2.2.21 AT+ WANN ................................................................................................ 63
5.2.2.2.22 AT+ LANN .................................................................................................. 63
5.2.2.2.23 AT+DHCPDEN .......................................................................................... 64
5.2.2.2.24 AT+ DHCPGW .......................................................................................... 64
5.2.2.2.25 AT+ TCPTO ............................................................................................... 64
5.2.2.2.26 AT+ MAXSK .............................................................................................. 65
5.2.2.2.27 AT+TCPB ................................................................................................... 65
5.2.2.2.28 AT+TCPPTB .............................................................................................. 65
5.2.2.2.29 AT+TCPADDB ........................................................................................... 66
5.2.2.2.30 AT+TCPTOB ............................................................................................. 66
5.2.2.2.31 AT+TCPLKB .............................................................................................. 66
5.2.2.2.32 AT+EPHY ................................................................................................... 66
5.2.2.2.33 AT+STTC ................................................................................................... 67
5.2.2.2.34 AT+DOMAIN ............................................................................................. 67
5.2.2.2.35 AT+FUDLX ................................................................................................ 67
5.2.2.2.36 AT+MMID ................................................................................................... 68
5.2.2.2.37 AT+IDFIR ................................................................................................... 68
5.2.2.2.38 AT+IDEVE ................................................................................................. 68
5.2.2.2.39 AT+AABR ................................................................................................... 69
5.2.2.2.40 AT+RELD ................................................................................................... 69
5.2.2.2.41 AT+Z ........................................................................................................... 69
5.2.2.2.42 AT+MID ...................................................................................................... 69
5.2.2.2.43 AT+VER ..................................................................................................... 69

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5.2.2.2.44 AT+H .......................................................................................................... 69
5.2.2.2.45 AT+ HTTPURL .......................................................................................... 70
5.2.2.2.46 AT+ HTTPTP ............................................................................................. 70
5.2.2.2.47 AT+ HTTPPH ............................................................................................ 70
5.2.2.2.48 AT+ HTTPCN ............................................................................................ 70
5.2.2.2.49 AT+ HTTPUA ............................................................................................ 71
5.2.2.2.50 AT+WSSSIDA ........................................................................................... 71
5.2.2.2.51 AT+WSSSIDB ........................................................................................... 71
5.2.2.2.52 AT+WSSSIDC ........................................................................................... 72
5.2.2.2.53 AT+WSKEYA ............................................................................................. 72
5.2.2.2.54 AT+WSKEYB ............................................................................................ 72
5.2.2.2.55 AT+WSKEYC ............................................................................................ 73
5.2.2.2.56 AT+ WSQY ................................................................................................ 74
5.2.2.2.57 AT+ HTPMODE ........................................................................................ 74
5.2.2.2.58 AT+ HTPSV ............................................................................................... 74
5.2.2.2.59 AT+ HTPTP ............................................................................................... 74
5.2.2.2.60 AT+ HTPURL ............................................................................................ 75
5.2.2.2.61 AT+ HTPHEAD ......................................................................................... 75
5.2.2.2.62 AT+ REGEN .............................................................................................. 75
5.2.2.2.63 AT+ REGTCP ............................................................................................ 76
5.2.2.2.64 AT+ REGID ................................................................................................ 76
6 USR-WIFI232-A/B/C Usage Introduction ............................................................................................. 76
6.1 Module Debug .............................................................................................................................. 76
6.1.1 Software Debug Tools ...................................................................................................... 76
6.1.2 Network Connection ......................................................................................................... 77
6.1.3 Debug ................................................................................................................................. 77
6.2 Use Cases ..................................................................................................................................... 79
6.2.1 Wireless Control Application ........................................................................................... 79
6.2.2 Remote Management Application .................................................................................. 80
6.2.3 Transparent Serial Port Application ................................................................................ 80
6.2.4 Wireless Data Acquisition Card Application .................................................................. 81
Appendix A: Questions and Answers ....................................................................................................... 83
Q1: How to configure transparent serial port application (TCP protocol) with two WIFI
modules? .............................................................................................................................................. 83
Q2: Where to Set WIFI Module LAN IP and WAN IP through Web Page ？.............................. 84
Q3: How to configure transparent serial port application (UDP protocol) with two WIFI
modules? .............................................................................................................................................. 84
Q4: Where to set USR-WIFI232-A/B/C module network protocol (TCP/UDP)? ....................... 85
Q5: How to configure transparent serial port application: Two WIFI modules all configured as
STA and connection through AP? ..................................................................................................... 86
Q6: How to avoid IP address confliction when apply USR-WIFI232-A/B/C module? .............. 87
Q7: PC works as server, all WIFI modules works as data acquisition card and connect with
PC, how to configure this application? ............................................................................................ 87
Q8: WIFI module support UDP multicast? ...................................................................................... 88

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Q9:WIFI module operates in STA mode, the PC how to get the IP module? ............................ 88
Appendix b: evb reference design ............................................................................................................ 90
Appendix c: external power shutdown mode reference design ........................................................... 91
Appendix e: Contact Information .............................................................................................................. 92
Appendix f: Disclaimer ............................................................................................................................... 92
Appendix g: History .................................................................................................................................... 93

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1
1
1
1 Quick
Quick
Quick
Quick Start
Start
Start
Start
USR-WIFI232 series product is used to transm it data between RS232 and WIFI TCPIP
transparently, user can update the product to WIFI control without know ing the WIFI and TCPIP
detail. All the convert work is done by the module . F or users, the RS232 side is only as a serial
device,the WIFI side is TCPIP Socket data. User can setup the work detail by sample settings
which can setup via inside web pages or RS232 port . T he setup work only need do once, then it
will save the setting forever.
This chapter is a user guide for USR-WIFI232 series products. W e suggest users follow the guide
to test module at first, and will have a good understanding of the modules. U sers can also choose
the chapter which you are interested in to read. For specific details and instructions, please refer
to the following chapters.
If there are problems in using the process, you can refer to the official website of our application
case:
http://www.usriot.com/Faq/cat-47.html
http://www.usriot.com/Faq/cat-47.html
http://www.usriot.com/Faq/cat-47.html
http://www.usriot.com/Faq/cat-47.html
We can also submit the issue to our customer support center:
http://h.usriot.com
http://h.usriot.com
http://h.usriot.com
http://h.usriot.com
1.1
1.1
1.1
1.1 Hardware
Hardware
Hardware
Hardware connect
connect
connect
connect
In order to test WIFI module, we need connect module RS232 to PC and also WIFI to PC.
In order to test the communication between serial and WIFI network, we need to connect the
serial port to PC, and also connect WIFI networks to PC. Due to the special need both WIFI and
serial, we use PC which add USB WIFI network Card such as the following picture.
Figure 1 hardware
hardware
hardware
hardware connection
connection
connection
connection diagram
diagram
diagram
diagram
About the serial connection, because the module RS232 is 3.3V TTL lev el, the computer can not
connect to module directly, the user needs to have a TTL to RS232 adapter cable and then
connect to the computer. in order to facilitate the test, we provide USR-WIFI232-A/B/C evaluation
board for users to choose.

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1.2
1.2
1.2
1.2 Network
Network
Network
Network connection
connection
connection
connection
The following is the USR-WIFI232- A module example ,Other modules are the same. Open Wi-Fi,
search network, as shown in below, USR-WIFI232-A/B _3378(A/B determined according to the
specific type of module, XXXX is the MAC address after the four) is the default network name
(SSID) of the module.
Figure 2 WIFI
WIFI
WIFI
WIFI Search
Search
Search
Search
Join the network, choose to automatically obtain IP, WIFI module supports DHCP Server feature
and is enabled by default.

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Figure 3 WIFI
WIFI
WIFI
WIFI connection
connection
connection
connection
Now, n link led of USR-WIFI232- A Evaluation Board is lighting.
1.3
1.3
1.3
1.3 communication
communication
communication
communication test
test
test
test
Module ’s default setting:
SSID:
SSID:
SSID:
SSID: USR-WIFI232-A;

Encryption
Encryption
Encryption
Encryption mode
mode
mode
mode :
:
:
:open ，none ;
UART:
UART:
UART:
UART: 57600 ,8,1,None ;

Network
Network
Network
Network parameters
parameters
parameters
parameters ：TCP,Server,8899,10.10.100.254 ;
IP:
IP:
IP:
IP: 10.10.100.254;
We just need to follow the parameters of the corresponding set of network communication
parameters, you can make serial <- - > WIFI communication, the steps are as follows:
1. Open test software USR-TCP232-Test ;
2. COM Settings area (left):
C hoose COM port witch has connect the module, there is COM3, choose band rate to 57600 , this
is the default band rate of WIFI module, Click Open COM port.
3. Net Settings area (right):
C hoose TCP client mode, Server IP write 10.10.100.254, it is the WIFI default IP address, Server
port to 8899, It is the default Port the WIFI module listen, Click Connect to link to the module.
Now, you can test send data between RS232 and WIFI.
COM port to WIFI: PC RS232 -> Module RS232 -> Module WIFI -> PC WIFI .
WIFI to COM port: PC WIFI -> Module WIFI -> Module RS232 -> PC RS232.
Figure 4 serial
serial
serial
serial /
/
/
/ network
network
network
network transmission
transmission
transmission
transmission test
test
test
test

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2
2
2
2 Product
Product
Product
Product Overview
Overview
Overview
Overview
2.1
2.1
2.1
2.1 General
General
General
General Description
Description
Description
Description
USR-WIFI232-A/B/C module is an integration of 802.11 b/g/n wi-fi module,which provide a
wireless interface to any equipment with a Serial interface for data transfer.
The module used to MAC, baseband chip, RF transceiver unit, as well as the power
amplifier;Embedded firmware support wi-fi protocols and configuration, as well as the network
TCP/IP protocol stack.
USR-WIFI232-A/B/C uses the industry's highest performance embedded industrial structure, and
for the application of smart furniture, smart grid, handheld devices, personal medical, industrial
control, etc. These data fields, do a professional optimization.
USR-WIFI232-A/B/C as a hot spot can accommodate 32 clients simultaneously wi - fi access, but
also can accommodate 32 TCP client, specific models and parameters of the series modules are
as follows:
USR-WIFI232-A 40mm x 25mm ，2x7 2mm Connector ，Built-in antenna
USR-WIFI232-B 40mm x 25mm ，2x7 2mm Connector ，I-PEX connector
USR-WIFI232-Ca 40mm x 25mm ，SMT Footprint ，Built-in antenna
USR-WIFI232-Cb 40mm x 25mm ，SMT Footprint ，I-PEX connector
2.2
2.2
2.2
2.2 Device
Device
Device
Device Features
Features
Features
Features



Support
Support
Support
Support IEEE802.11b/g/n
IEEE802.11b/g/n
IEEE802.11b/g/n
IEEE802.11b/g/n Wireless
Wireless
Wireless
Wireless Standards
Standards
Standards
Standards



Support
Support
Support
Support TCP/IP/UDP
TCP/IP/UDP
TCP/IP/UDP
TCP/IP/UDP Network
Network
Network
Network Protocols
Protocols
Protocols
Protocols



Support
Support
Support
Support UART/GPIO/Ethernet
UART/GPIO/Ethernet
UART/GPIO/Ethernet
UART/GPIO/Ethernet Data
Data
Data
Data Interface
Interface
Interface
Interface



Support
Support
Support
Support Work
Work
Work
Work As
As
As
As STA/AP
STA/AP
STA/AP
STA/AP /AP+STA
/AP+STA
/AP+STA
/AP+STA Mode
Mode
Mode
Mode



Support
Support
Support
Support Router/Bridge
Router/Bridge
Router/Bridge
Router/Bridge Mode
Mode
Mode
Mode Networking
Networking
Networking
Networking



Support
Support
Support
Support Internal/External
Internal/External
Internal/External
Internal/External Antenna
Antenna
Antenna
Antenna Option
Option
Option
Option



Support
Support
Support
Support Transparent
Transparent
Transparent
Transparent Transmission
Transmission
Transmission
Transmission Mode
Mode
Mode
Mode



Support
Support
Support
Support AT+
AT+
AT+
AT+ Instruction
Instruction
Instruction
Instruction Set
Set
Set
Set for
for
for
for Configuration
Configuration
Configuration
Configuration



Support
Support
Support
Support Friendly
Friendly
Friendly
Friendly Web
Web
Web
Web Configuration
Configuration
Configuration
Configuration Page
Page
Page
Page



Support
Support
Support
Support Palmodic
Palmodic
Palmodic
Palmodic Signal
Signal
Signal
Signal



Support
Support
Support
Support UART
UART
UART
UART Auto-Frame
Auto-Frame
Auto-Frame
Auto-Frame Function
Function
Function
Function



Single
Single
Single
Single +3.3V
+3.3V
+3.3V
+3.3V Power
Power
Power
Power Supply
Supply
Supply
Supply



Small
Small
Small
Small Size:
Size:
Size:
Size: 25
25
25
25 x
x
x
x 40mm
40mm
40mm
40mm