Jinan USR IOT Technology USR-WIFI232-S User manual

USR-WIFI232-S/T/G2 Low Power WiFi Module User Manual http://en.usr.cn
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USR-WIFI232-S/T/G2
Low Power WiFi Module User Manual V3.1
Overview of Characteristic
Support IEEE802.11b/g/n Wireless Standards
Based on Self-developed High Performance MCU
Ultra-Low-Power Applications with Excellent Power Save
Support UART/PWM/GPIO Data Communication Interface
Support Work As STA/AP Mode
Support Smart Link Function (APP program provide)
Support USRLINK Function(Fast set SSID)
Support Wireless Upgrade Function
Support WPS Function
Support Multi-TCP Link (5 Channel) Application
Support Internal/External(I-PEX/SMA) Antenna Option
Single +3.3V Power Supply
Smallest Size:
USR-WIFI232-S 22mm x 13.5mm x 2.3mm, SMT Footprint
USR-WIFI232-T 22mm x 13.5mm x 6mm, 1x10 2mm Connector
USR-WIFI232-G2 23.1mm x 32.8mm x 2.7mm, SMT Footprint

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FCC/CE Certificated

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Catalogue
1、Quick start............................................................................................................................................................7
1.1 Hardware connect........................................................................................................................................7
1.2 Network connection..................................................................................................................................... 8
1.3 communication test......................................................................................................................................8
1.4 Application Examples................................................................................................................................ 10
1.4.1 Wireless remote control applications.................................................................................................. 10
1.4.2 Remote connectivity applications........................................................................................................ 10
1.4.3 Transparent Transmission.....................................................................................................................10
2、Product Overview......................................................................................................................................... 12
2.1 General Description...................................................................................................................................12
2.2 Device Features......................................................................................................................................... 12
2.3 Device Paremeters.................................................................................................................................... 13
2.4 Modules feature comparison................................................................................................................... 14
2.5 Key Application...........................................................................................................................................14
2.6 Package Information................................................................................................................................. 15
2.6.1 Recommended Reflow Profile..............................................................................................................15
2.6.2 Device Handling Instruction (Module IC SMT Preparation)............................................................ 15
2.6.3 Shipping Information.............................................................................................................................. 16
3、Hardware Introduction..................................................................................................................................... 17
3.1 Pins Definition.............................................................................................................................................17
3.1.1. USR-WIFI232-S Pins Definition..........................................................................................................17
3.1.2. USR-WIFI232-T Pins Definition.......................................................................................................... 19
3.1.3. USR-WIFI232-G2 Pins Definition....................................................................................................... 21
3.2 Electrical Characteristics.......................................................................................................................... 24
3.3 Mechanical Size......................................................................................................................................... 24
3.3.1 USR-WIFI232-S......................................................................................................................................24
3.3.2 USR-WIFI232-T...................................................................................................................................... 25
3.3.3 USR-WIFI232-G2................................................................................................................................... 26
3.4 Antenna........................................................................................................................................................27
3.4.1 USR-WIFI232-S......................................................................................................................................27
3.4.2 USR-WIFI232-T...................................................................................................................................... 28
3.4.3 USR-WIFI232-G2................................................................................................................................... 29
3.5 Evaluation Kit..............................................................................................................................................30
3.6 Typical Application Hardware...................................................................................................................31
3.6.1 UART Application Hardware.................................................................................................................31
3.6.2 PWM/GPIO Application Hardware.......................................................................................................31
4、Modules function description..........................................................................................................................32
4.1 Work Mode..................................................................................................................................................32
4.1.1 Throughput mode................................................................................................................................... 32
1. Throughput mode brief introduction..........................................................................................32
2. UART Frame Scheme.................................................................................................................33
4.1.2 Command Mode..................................................................................................................................... 34

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4.1.3 GPIO/PWM Mode...................................................................................................................................34
4.2 Wireless Networking..................................................................................................................................35
4.2.1 STA WI-FI Mode......................................................................................................................................36
4.2.2 AP WI-FI Mode........................................................................................................................................36
4.2.3 Encryption................................................................................................................................................36
4.3 Socket Communication.............................................................................................................................37
4.3.1 Socket A................................................................................................................................................... 37
4.3.2 Socket B...................................................................................................................................................37
4.4 Fast access Wi-Fi(usrlink)........................................................................................................................38
4.5 Searching Wi-Fi protocol & Network AT Command............................................................................. 41
4.6 Reporting MAC...........................................................................................................................................41
4.7 D2D function............................................................................................................................................... 41
4.8 HTTPD Function........................................................................................................................................ 42
4.9 RS485 Function......................................................................................................................................... 44
4.10 Parameter configuration......................................................................................................................... 44
4.11 Firmware and web upgrade................................................................................................................... 44
5、Module Parameter configuration................................................................................................................... 45
5.1 Web.............................................................................................................................................................. 45
5.1.1 Web Brief Description............................................................................................................................ 45
5.1.2 Open Web Management Interface...................................................................................................... 45
5.1.3 Fast Set SSID Page(usrlink).................................................................................................................46
5.1.4 System Page........................................................................................................................................... 47
5.1.5 STA Setting Page................................................................................................................................... 47
5.1.6 AP Setting Page......................................................................................................................................48
5.1.7 Network Setting Page............................................................................................................................ 49
5.1.8 UART Setting Page................................................................................................................................ 49
5.1.9 Account Management Page................................................................................................................. 49
5.1.10 Upgrade Software Page......................................................................................................................50
5.1.11 Restart Page..........................................................................................................................................50
5.1.12 Restore Page........................................................................................................................................ 51
5.2 AT command............................................................................................................................................... 51
5.2.1 Switch to Command Mode....................................................................................................................52
5.2.2 AT command Overview..........................................................................................................................53
5.2.3 AT command introduction......................................................................................................................54
1) AT+E.......................................................................................................................................................56
2) AT+WMODE......................................................................................................................................... 57
3) AT+ENTM..............................................................................................................................................57
4) AT+TMODE...........................................................................................................................................57
5) AT+MID.................................................................................................................................................. 57
6) AT+RELD...............................................................................................................................................58
7) AT+Z.......................................................................................................................................................58
8) AT+H...................................................................................................................................................... 58
9) AT+CFGTF............................................................................................................................................ 58
10) AT+UART............................................................................................................................................ 58

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11) AT+UARTF.......................................................................................................................................... 59
12) AT+UARTFT....................................................................................................................................... 59
13) AT+UARTFL........................................................................................................................................59
14) AT+UARTTE....................................................................................................................................... 59
15) AT+PING............................................................................................................................................. 60
16) AT+SEND............................................................................................................................................60
17) AT+RECV............................................................................................................................................60
18) AT+NETP............................................................................................................................................ 60
19) AT+MAXSK......................................................................................................................................... 61
20) AT+TCPLK.......................................................................................................................................... 61
21) AT+TCPTO..........................................................................................................................................62
22) AT+TCPDIS........................................................................................................................................ 62
23) AT+SOCKB......................................................................................................................................... 62
24) AT+TCPDISB......................................................................................................................................63
25) AT+TCPTOB.......................................................................................................................................63
26) AT+TCPLKB....................................................................................................................................... 64
27) AT+SNDB............................................................................................................................................64
28) AT+RCVB............................................................................................................................................64
29) AT+WSSSID....................................................................................................................................... 64
30) AT+WSKEY.........................................................................................................................................64
31) AT+WANN........................................................................................................................................... 65
32) AT+WSMAC........................................................................................................................................65
33) AT+WSLK............................................................................................................................................66
34) AT+WSLQ........................................................................................................................................... 66
35) AT+WSCAN........................................................................................................................................ 66
36) AT+WSDNS........................................................................................................................................ 66
37) AT+LANN............................................................................................................................................ 67
38) AT+WAP.............................................................................................................................................. 67
39) AT+WAKEY.........................................................................................................................................67
40) AT+WAMAC........................................................................................................................................68
41) AT+WADHCP..................................................................................................................................... 68
42) AT+WALK............................................................................................................................................68
43) AT+WALKIND.....................................................................................................................................68
44) AT+PLANG......................................................................................................................................... 69
45) AT+WEBU........................................................................................................................................... 69
46) AT+NTPRF..........................................................................................................................................69
47) AT+NTPEN......................................................................................................................................... 70
48) AT+NTPTM......................................................................................................................................... 70
49) AT+DTDDIS........................................................................................................................................ 70
50) AT+DTDID...........................................................................................................................................70
51) AT+HTPEN......................................................................................................................................... 71
52) AT+HTPTP..........................................................................................................................................71
53) AT+HTPSV..........................................................................................................................................71
54) AT+HTPHD......................................................................................................................................... 72

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55) AT+HTPURL....................................................................................................................................... 72
56) AT+HTPTO..........................................................................................................................................72
57) AT+HTPFT.......................................................................................................................................... 73
58) AT+WRMID......................................................................................................................................... 73
59) AT+ASWD........................................................................................................................................... 73
60) AT+MDCH........................................................................................................................................... 73
61) AT+TXPWR.........................................................................................................................................74
62) AT+WPS..............................................................................................................................................74
63) AT+WPSBTNEN................................................................................................................................ 74
64) AT+SMTLK..........................................................................................................................................74
65) AT+LPTIO........................................................................................................................................... 75
66) AT+USERVER....................................................................................................................................75
67) AT+CUSTOMER................................................................................................................................ 75
68) AT+RPTMAC...................................................................................................................................... 75
69) AT+WRRPTMAC............................................................................................................................... 76
70) AT+WIFI...............................................................................................................................................76
71) AT+WIFICHK...................................................................................................................................... 76
72) AT+CHKTIME..................................................................................................................................... 76
73) AT+RSEN............................................................................................................................................77
Appendix A: HW Reference Design...................................................................................................................... 78
USR-WIFI232-S Evaluation Kit Schematic.................................................................................................. 78
USR-WIFI232-T Evaluation Kit Schematic...................................................................................................79
USR-WIFI232-G2 Evaluation Kit Schematic................................................................................................80
Appendix B: GPIO/PWM CONTROL WITH NETWORK COMMANDS.......................................................... 81
Appendix C: Contact Information.....................................................................................................................86
Appendix D: Disclaimer........................................................................................................................................... 86
Appendix E: Update History....................................................................................................................................86

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1、Quick start
USR-WIFI232 series product is used to transmit data between RS232 and WIFI
TCPIP transparently, user can update the product to WIFI control without knowing the
WIFI and TCPIP detail. All the convert work is done by the module. For 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. The setup work only need do once, then it will save the setting forever.
This chapter is a user guide for USR-WIFI232 series products. We suggest users
follow the guide to test module at first, and will have a good understanding of the
modules. Users can also choose the chapter which you are interested in to read. For
specific details and instructions, please refer to the following chapters.
Support：http://h.usriot.com
1.1 Hardware 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.
RS232
WIFI
Figure 1 hardware connection diagram
About the serial connection, because the module RS232 is 3.3V TTL level, 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-S/T/G2 evaluation board for users to choose.

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1.2 Network connection
The following is the USR-WIFI232-T module example, except SSID, other
modules are the same to USR-WIFI232-T. Open Wi-Fi, search network, as shown in
below, USR-WIFI232-T is the default network name (SSID) of the module.
Figure 2 WIFI Search
Join the network, choose to automatically obtain IP, WIFI module supports DHCP
Server feature and is enabled by default.
Figure 3 WIFI connection
Now, nlink led of USR-WIFI232-T Evaluation Board is lighting.
1.3 communication test
Module’s default setting:
SSID: USR-WIFI232-T;

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Encryption mode: open,none;
UART: 115200,8,1,None;
Network parameters: TCP,Server,8899,10.10.100.254;
IP: DHCP,0.0.0.0,0.0.0.0,0.0.0.0
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):
Choose COM port witch has connect the module, there is COM3, choose
band rate to 115200, this is the default band rate of WIFI module, Click Open
COM port.
3. Net Settings area (right):
Choose 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 / network parameter settings and transmission test

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1.4 Application Examples
1.4.1 Wireless remote control applications
Figure 5 Wireless remote control applications
In the wireless remote control applications, USR-WIFI232 module works in AP
mode. USR-WIFI232 module’s serial connect user’s devices. Control client (such as
smartphones) can controll the user equipment via wireless network.
1.4.2 Remote connectivity applications
Figure 6 Remote connectivity applications
In remote connection applications, USR-WIFI232 module works in the STA mode,
connect to internet through internet gateway. Module is set to TCP Client, connected
to the internet TCP server. User devices connected to USR-WIFI232 module through
the serial port.
This application can collect data from the user device and send it to the server for
processing and storage, the internet server can also send commands to control the
user device for control. Users can use smartphone or PC to control the user device via
LAN, and also can control the user device via WAN by communicate to internet
server.
1.4.3 Transparent Transmission
In this application, two USR-WIFI232 modules connecet by Wi-Fi as shown below,