Usr USR-WIFI232-G User manual

Low Power WiFi Module User Manual V1.3 http://www.tcp232.net
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Low Power WiFi Module User Manual
(USR-WIFI232-G) V 1.3
Overview of Characteristic
Support IEEE802.11b/g/n Wireless Standards
Fully Self-Contained Serial-to-Wireless Functionality
Ultra-Low-Power for Battery Applications with Excellent Power Save Scheme
Support UART/SPI/USB/PWM/GPIO Data Communication Interface
Support Work As STA/AP/AP+STA Mode
Support Smart Link Function (APP program provide)
Support Wireless and Remote Firmware Upgrade Function
Support User-Defined Web Page Upload
Support DNS to Open Webpage
Support Internal/External Antenna Option
Single +3.3V Power Supply
Smallest Size: 23.1mm x 32.8mm x2.7mm
FCC/CE Certificated

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TABLE OF CONTENTS
LIST OF FIGURES.................................................................................................................................................5
LIST OF TABLES................................................................................................................................................... 5
HISTORY................................................................................................................................................................. 6
1. PRODUCT OVERVIEW................................................................................................................................ 7
1.1. GENERAL DESCRIPTION.......................................................................................................................7
1.1.1 DEVICE FEATURES.......................................................................................................................... 7
1.1.2 DEVICE PAREMETERS.................................................................................................................... 8
1.1.3 KEY APPLICATION............................................................................................................................ 8
1.2. HARDWARE INTRODUCTION............................................................................................................... 9
1.2.1. PINS DEFINITION............................................................................................................................. 9
1.2.2. ELECTRICAL CHARACTERISTICS.............................................................................................11
1.2.3. MECHANICAL SIZE........................................................................................................................ 11
1.2.4. ON-BOARD CHIP ANTENNA........................................................................................................ 12
1.2.5. EXTERNAL ANTENNA................................................................................................................... 13
1.2.6. EVALUATION KIT............................................................................................................................13
1.2.7. ORDER INFORMATION.................................................................................................................14
1.3. TYPICAL APPLICATION........................................................................................................................ 15
1.3.1. HARDWARE TYPICAL APPLICATION........................................................................................15
2. FUNCTIONAL DESCRIPTION................................................................................................................. 16
2.1. WIRELESS NETWORKING...................................................................................................................16
2.1.1. BASIC WIRELESS NETWORK BASED ON AP (INFRASTRUCTURE).................................17
2.1.2. WIRELESS NETWORK BASED ON AP+STA............................................................................ 17
2.2. WORK MODE : TRANSPARENT TRANSMISSION MODE............................................................. 18
2.3. UART FRAME SCHEME........................................................................................................................ 19
2.3.1. UART FREE-FRAME...................................................................................................................... 19
2.3.2. UART AUTO-FRAME...................................................................................................................... 19
2.4. ENCRYPTION.......................................................................................................................................... 19
2.5. NETWORK PROTOCOL........................................................................................................................ 20
2.6. MULTI-TCP LINK CONNECTION......................................................................................................... 20
2.7. POWER SAVE SCHEME....................................................................................................................... 21
2.8. PARAMETERS CONFIGURATION...................................................................................................... 22
2.9. FIRMWARE UPDATE............................................................................................................................. 22
2.10. GPIO FUNCTION.................................................................................................................................. 23
3. OPERATION GUIDELINE......................................................................................................................... 24
3.1. CONFIGURATION VIA WEB ACCESSING........................................................................................ 24
3.1.1. OPEN WEB MANAGEMENT INTERFACE................................................................................. 24
3.1.2. SYSTEM PAGE................................................................................................................................25

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3.1.3. WORK MODE PAGE.......................................................................................................................25
3.1.4. STA SETTING PAGE...................................................................................................................... 26
3.1.5. AP SETTING PAGE........................................................................................................................ 26
3.1.6. OTHER SETTING PAGE................................................................................................................27
3.1.7. ACCOUNT MANAGEMENT PAGE...............................................................................................27
3.1.8. UPGRADE SOFTWARE PAGE.....................................................................................................28
3.1.9. RESTART PAGE............................................................................................................................. 28
3.1.10. RESTORE PAGE...........................................................................................................................29
3.2. USR-WIFI232-G USAGE INTRODUCTION........................................................................................ 29
3.2.1. SOFTWARE DEBUG TOOLS........................................................................................................29
3.2.2. NETWORK CONNECTION............................................................................................................ 30
3.2.3. DEFAULT PARAMETER SETTING..............................................................................................30
3.2.4. MODULE DEBUG............................................................................................................................ 30
3.3. TYPICAL APPLICATION EXAMPLES................................................................................................. 32
3.3.1. WIRELESS CONTROL APPLICATION........................................................................................32
3.3.2. REMOTE MANAGEMENT APPLICATION.................................................................................. 32
3.3.3. TRANSPARENT SERIAL PORT APPLICATION........................................................................32
4. AT+INSTRUCTION INTRODUCTION................................................................................................... 33
4.1. CONFIGURATION MODE..................................................................................................................... 33
4.1.1. SWITCH TO CONFIGURATION MODE...................................................................................... 33
4.2. AT+ INSTRUCTION SET OVERVIEW.................................................................................................34
4.2.1. INSTRUCTION SYNTAX FORMAT.............................................................................................. 35
4.2.2. AT+ INSTRUCTION SET................................................................................................................36
4.2.2.1. AT+E...............................................................................................................................................37
4.2.2.2. AT+WMODE..................................................................................................................................37
4.2.2.3. AT+ENTM...................................................................................................................................... 37
4.2.2.4. AT+TMODE................................................................................................................................... 38
4.2.2.5. AT+MID.......................................................................................................................................... 38
4.2.2.6. AT+VER......................................................................................................................................... 38
4.2.2.7. AT+RELD....................................................................................................................................... 38
4.2.2.8. AT+Z............................................................................................................................................... 38
4.2.2.9. AT+H...............................................................................................................................................39
4.2.2.10. AT+CFGRD................................................................................................................................. 39
4.2.2.11. AT+CFGWR................................................................................................................................ 39
4.2.2.12. AT+CFGFR..................................................................................................................................39
4.2.2.13. AT+CFGTF.................................................................................................................................. 39
4.2.2.14. AT+UART.................................................................................................................................... 40
4.2.2.15. AT+ UARTF................................................................................................................................. 40
4.2.2.16. AT+ UARTFT.............................................................................................................................. 41
4.2.2.17. AT+ UARTFL...............................................................................................................................41
4.2.2.18. AT+ UARTTE.............................................................................................................................. 41
4.2.2.19. AT+ SEND................................................................................................................................... 41
4.2.2.20. AT+ RECV................................................................................................................................... 42
4.2.2.21. AT+ PING.................................................................................................................................... 42

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4.2.2.22. AT+NETP.....................................................................................................................................42
4.2.2.23. AT+ TCPLK................................................................................................................................. 43
4.2.2.24. AT+ TCPTO.................................................................................................................................43
4.2.2.25. AT+TCPDIS.................................................................................................................................43
4.2.2.26. AT+WSSSID................................................................................................................................43
4.2.2.27. AT+WSKEY................................................................................................................................. 44
4.2.2.28. AT+ WANN.................................................................................................................................. 44
4.2.2.29. AT+ WSMAC............................................................................................................................... 45
4.2.2.30. AT+ WSLK................................................................................................................................... 45
4.2.2.31. AT+ WSLQ.................................................................................................................................. 45
4.2.2.32. AT+WSCAN................................................................................................................................ 45
4.2.2.33. AT+ WSDNS............................................................................................................................... 46
4.2.2.34. AT+ LANN....................................................................................................................................46
4.2.2.35. AT+WAP...................................................................................................................................... 46
4.2.2.36. AT+WAKEY................................................................................................................................. 47
4.2.2.37. AT+WAMAC................................................................................................................................ 47
4.2.2.38. AT+WADHCP..............................................................................................................................47
4.2.2.39. AT+WADMN................................................................................................................................ 48
4.2.2.40. AT+WEBSWITCH...................................................................................................................... 48
4.2.2.41. AT+PLANG..................................................................................................................................48
4.2.2.42. AT+UPURL..................................................................................................................................49
4.2.2.43. AT+UPFILE................................................................................................................................. 49
4.2.2.44. AT+UPST.....................................................................................................................................49
4.2.2.45. AT+WEBU................................................................................................................................... 49
4.2.2.46. AT+MSLP.................................................................................................................................... 50
4.2.2.47. AT+WRMID................................................................................................................................. 50
4.2.2.48. AT+ASWD................................................................................................................................... 50
5. PACKAGE INFORMATION....................................................................................................................... 51
5.1. RECOMMENDED REFLOW PROFILE............................................................................................... 51
5.2. DEVICE HANDLING INSTRUCTION (MODULE IC SMT PREPARATION)..................................51
5.3. SHIPPING INFORMATION.................................................................................................................... 52
APPENDIX A: HW REFERENCE DESIGN............................................................................................... 53
APPENDIX B: GPIO/PWM FUNCTION......................................................................................................54
B.1 NETWORK COMMAND.......................................................................................................................... 54
B.2 HEX NETWORK COMMAND................................................................................................................. 56
APPENDIX C: CONTACT INFORMATION............................................................................................... 59

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LIST OF FIGURES
Figure 1. USR-WIFI232-G Demo..................................................................................................................9
Figure 2. USR-WIFI232-G Pins Map............................................................................................................9
Figure 3. USR-WIFI232-G Mechanical Dimension.................................................................................. 11
Figure 4. USR-WIFI232-G PCB Symbol Size...........................................................................................12
Figure 5. Suggested Module Placement Region..................................................................................... 12
Figure 6. USR-WIFI232-G Evaluation Kit..................................................................................................13
Figure 7. USR-WIFI232-G Order Information........................................................................................... 14
Figure 8. USR-WIFI232-G Hardware Typical Application...................................................................... 15
Figure 9. USR-WIFI232-G Basic Wireless Network Structure............................................................... 17
Figure 10. HF-A11 AP+STA Network Structure......................................................................................... 17
Figure 11. Multi-TCP Link Data Transmition Structure............................................................................. 21
Figure 12. Open Web Management page................................................................................................... 25
Figure 13. System Web Page....................................................................................................................... 25
Figure 14. Work Mode Page..........................................................................................................................26
Figure 15. STA Setting Page.........................................................................................................................26
Figure 16. AP Setting Page........................................................................................................................... 27
Figure 17. Other Setting Page.......................................................................................................................27
Figure 18. Account Page................................................................................................................................28
Figure 19. Upgrade SW page........................................................................................................................28
Figure 20. Restart Page................................................................................................................................. 29
Figure 21. Restore Page................................................................................................................................ 29
Figure 22. STA Interface Debug Connection.............................................................................................. 30
Figure 23. AP Interface Debug Connection................................................................................................ 30
Figure 24. “CommTools” Serial Debug Tools............................................................................................. 31
Figure 25. “TCPUDPDbg” Tools Create Connection.................................................................................31
Figure 26. “TCPUDPDbg” Tools Setting......................................................................................................31
Figure 27. “TCPUDPDbg” Tools Connection.............................................................................................. 31
Figure 28. Wireless Control Application...................................................................................................... 32
Figure 29. Remote Management Application............................................................................................. 32
Figure 30. Transparent Serial Port Application...........................................................................................33
Figure 31. USR-WIFI232-G Default UART Port Parameters................................................................... 33
Figure 32. Switch to Configuration Mode.................................................................................................... 34
Figure 33. ”AT+H” Instruction for Help......................................................................................................... 34
Figure 34. Reflow Soldering Profile..............................................................................................................51
Figure 35. Shipping Information.................................................................................................................... 52
LIST OF TABLES
Table 1 USR-WIFI232-G Module Technical Specifications.........................................................................8
Table 2 USR-WIFI232-G Pins Definition........................................................................................................ 9
Table 3 USR-WIFI232-G External Antenna Parameters........................................................................... 13

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Table 4 USR-WIFI232-G Evaluation Kit Interface Description................................................................. 14
Table 5 USR-WIFI232-G IP Stack Features................................................................................................ 20
Table 6 Standby Mode Status and Wake Up................................................................................................21
Table 7 USR-WIFI232-G GPIO Pin Mapping Table................................................................................... 23
Table 8 USR-WIFI232-G Web Access Default Setting.............................................................................. 24
Table 9 Error Code Describtion..................................................................................................................... 35
Table 10 AT+ Instruction Set List.................................................................................................................. 36
Table 11 Reflow Soldering Parameter............................................................................................................51
HISTORY
Ed. V1.0 Created on 1-29-2013.
Ed. V1.1 02-24-2013. Update AT command contents.
Ed. V1.2 03-28-2013. Update AT command contents.
Ed. V1.3 07-19-2013. Update GPIO/PWM function

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1. PRODUCT OVERVIEW
1.1. General Description
The USR-WIFI232-G is a fully self-contained small form-factor, single stream, 802.11b/g/n Wi-Fi
module, which provide a wireless interface to any equipment with a Serial/SPI/USB interface for data
transfer.USR-WIFI232-G integrate MAC, baseband processor, RF transceiver with power amplifier in
hardware and all Wi-Fi protocol and configuration functionality and networking stack, in embedded
firmware to make a fully self-contained 802.11b/g/n Wi-Fi solution for a variety of applications.
USR-WIFI232-G support AP+STA wireless networking and support Wi-Fi Direct. USR-WIFI232-G also
provides wireless and remote firmware upgrade, which satisfied all kinds of application requirement.
USR-WIFI232-G support user defined Web page and can revise the data communication protocol,
which reduce much customer’s software development and customization work.
The USR-WIFI232-G employs the world's lowest power consumption embedded architecture. It has
been optimized for all kinds of client applications in the home automation, smart grid, handheld device,
personal medical application and industrial control that have lower data rates, and transmit or receive
data on an infrequent basis.
The USR-WIFI232-G integrates all Wi-Fi functionality into a low-profile, 23.1x32.8x 2.7mm SMT
module package that can be easily mounted on main PCB with application specific circuits. Also,
module provides built-in antenna, external antenna option.
1.1.1 Device Features
Single stream Wi-Fi @ 2.4 GHz with support for WEP security mode as well as WPA/WPA2
Fully self-contained serial-to-wireless functionality.
Ultra-low-power operation with all kinds of power-save modes.
Includes all the protocol and configuration functions for Wi-Fi connectivity.
Support STA/AP/AP+STA Mode
Support Smart Link Function
Support Wireless and Remote Firmware Upgrade Function
Support User-Defined Web Page Upload
Integrated chip antenna, antenna connector options.
Compact surface mount module 23.1mm x 32.8mm x 2.7mm.
Full IPv4 and IPv6 stack.
Low power RTOS and drivers.
FCC Certified.
RoHS and CE compliant.
Single supply – 3.3V operation.

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1.1.2 Device Paremeters
Table 1 USR-WIFI232-G Module Technical Specifications
Class Item Parameters
Wireless
Parameters
Certification FCC/CE
Wireless standard 802.11 b/g/n
Frequency range 2.412GHz-2.484GHz
Transmit Power
802.11b: +17.5 dBm (@11Mbps)
802.11g: +16 dBm (@54Mbps) for CE
802.11g: +13 dBm (@54Mbps) for FCC
802.11n: +16 dBm (@HT20, MCS7) for CE
802.11n: +12 dBm (@HT20, MCS7) for FCC
Receiver Sensitivity
802.11b: -93 dBm (@11Mbps ,CCK)
802.11g: -85 dBm (@54Mbps, OFDM)
802.11n: -82 dBm (@HT20, MCS7)
Antenna Option External:I-PEX Connector
Internal:On-board PCB antenna
Hardware
Parameters
Data Interface
UART
USB, SPI, PWM…
Others: GPIO, ADC/DAC, RTC…
Operating Voltage 3.1~3.6V
Operating Current
Peak [Continuous TX]: ~200mA
Normal [WiFi ON/OFF, DTIM=100ms]:
Average. ~8mA, Peak: 200mA
Standby [WiFi Shutdown]: <80uA
Operating Temp. -40℃- 85℃
Storage Temp. -45℃- 125℃
Dimensions and Size 23.1mm×32.8mm×2.7mm
Software
Parameters
Network Type STA /AP/STA+AP
Security Mechanisms WEP/WPA-PSK/WPA2-PSK
Encryption WEP64/WEP128/TKIP/AES
Update Firmware Local Wireless, Remote
Customization Web Page Upgrade
Support SDK for application develop
Serial command AT+instruction set
Network Protocol IPv4, IPv6,TCP/UDP/FTP/HTTP
User Configuration AT+instruction set. Android/ iOS
Smart Link APP tools
1.1.3 Key Application
Remote equipment monitoring
Asset tracking and telemetry
Security
Industrial sensors and controls
Home automation
Medical devices

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1.2. Hardware Introduction
Figure 1. USR-WIFI232-G Demo
1.2.1. Pins Definition
Figure 2. USR-WIFI232-G Pins Map
Table 2 USR-WIFI232-G Pins Definition
Pin Describtion Net Name Signal Type Comments
1,17,32,48 Ground GND Power
2 JTAG Function JTAG_TCK I, PU JTAG/Debug functional pin,
No connect if not use.
3 JTAG Function JTAG_TDO O
4 JTAG Function JTAG_TDI I,PU
5 JTAG Function JTAG_TMS I,PU
6 N.C No connect

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7 RTC Input 1 ALARM1 I.PU GPIO7, Sleep_RQ Pin
(Suggest 100K ohm Pull up even
not use this function.)
8 RTC Output 1 RTC_OUT1 O GPIO8, Sleep_ON Pin
9 +3.3V Power DVDD Power
10 N.C No connect
11 A/D Input 1 ADC1 I/O,PD GPIO11, No connect if not use.
12 A/D Input 2 ADC2 I/O,PD GPIO12, No connect if not use.
13 RTC Input 2 ALARM2 I,PD GPIO13, No connect if not use.
14 N.C No connect
15 N.C No link, Must No connect
16 PWM 1 Output USB_PIO I/O GPIO16, No connect if not use.
18 N.C No connect
19 N.C No connect
20 PWM 2 Output GPIO20 I/O GPIO20, No connect if not use.
21 USB Interface USB- I/O 90 ohm Diff. Line
22 USB Interface USB+ I/O 90 ohm Diff. Line
23 GPIO 1 Output PWMH0 O GPIO23, No connect if not use.
24 PWM Output0-low PWML0 O GPIO24, No connect if not use.
25 N.C No connect
26 GPIO 0 Output GPIO26 I/O GPIO26, No connect if not use.
27 SPI Interface SPI_MISO I/O, PU No connect if not use.
28 SPI Interface SPI_CLK I/O, PU No connect if not use.
29 SPI Interface SPI_CS I/O,PU No connect if not use.
30 SPI Interface SPI_MOSI I/O.PD No connect if not use.
31 +3.3V Power DVDD Power
33 N.C No connect
34 +3.3 Power DVDD Power
35 GPIO GPIO35 I/O,PD GPIO35, WPS functional pin
36 N.C No connect
37 N.C No connect
38 N.C No connect
39 UART0 UART0_TX I,PU UART Communication Pin
40 UART0 UART0_RTS 0 UART Communication Pin
41 UART0 UART0_RX 0 UART Communication Pin
42 UART0 UART0_CTS I,PU UART Pin (Or RS485 Control)
43 Wi-Fi Status nLink O,PU “0”- Wi-Fi Linked
“1”- No WIFI Linked
No connect if not use.
44 Module Boot Up
Indicator
nReady O,PU “0” – Boot-up OK;
“1” – Boot-up No OK;
No connect if not use.;
45 Restore
Configuration
nReload I,PU Module will restore factory
default after set this pin “0” more
than 1s, then set “1”.
(Suggest 50K ohm Pull up even
not use this function.)
46 GPIO 2 Output PWMFI0 I/O GPIO46, No connect if not use.