Waveshare WIFI232 User manual

WAVESHARE ELECTRONICS
WIFI232 User Manual
Page 1 of 81
WIFI232 User Manual
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 Of Contents
1Quick Start...................................................................................................................................6
1.1 Hardware connect........................................................................................................6
1.2 Network connection......................................................................................................7
1.3 communication test ......................................................................................................8
2Product Overview........................................................................................................................9
2.1 General Description......................................................................................................9
2.2 Device Features ...........................................................................................................9
2.3 Device Paremeters.....................................................................................................10
2.4 KeyApplication...........................................................................................................11
2.5 Package Information ..................................................................................................11
2.5.1 Recommended Reflow Profile............................................................................ 11
2.5.2 Device Handling Instruction (Module IC SMT Preparation)...............................11
2.5.3 Shipping Information...........................................................................................12
3Hardware Introduction...............................................................................................................12
3.1 Pins Definition.............................................................................................................13
3.1.1 WIFI232 Pins Definition......................................................................................13
3.2 Mechanical Size.........................................................................................................14
3.2.1 WIFI232...............................................................................................................14
3.3 Antenna.......................................................................................................................15
3.3.1 On-board ChipAntenna......................................................................................15
3.3.2 External Antenna.................................................................................................16
3.4 Evaluation Kit..............................................................................................................16
3.5 Hardware Reference Design......................................................................................18
3.5.1 HardwareTypicalApplication .............................................................................18
3.5.2 10/100M Ethernet Interface................................................................................19
3.5.2.1 Ethernet Connection with Transformer................................................19
3.5.2.2 Ethernet Connection without Transformer...........................................19
3.5.3 UART Interface....................................................................................................20
3.5.4 Power Interface...................................................................................................21
4Modules Function Description ..................................................................................................21
4.1 User configuration process........................................................................................21
4.2 Working mode.............................................................................................................22
4.2.1 Transparent Mode...............................................................................................22
4.2.2 Serial command mode........................................................................................23
4.2.3 GPIO mode .........................................................................................................24
4.2.4 HTTPD Client mode............................................................................................24
4.3 Wireless Networking...................................................................................................25
4.3.1 STA......................................................................................................................25
4.3.2 AP........................................................................................................................26
4.3.3 AP+STA...............................................................................................................27
4.4 Ethernet Interface Communication............................................................................28
4.4.1 WIFI232 Ethernet Interface Networking (AsAP) ..............................................28
4.4.2 WIFI232 Ethernet Interface Networking (As STA, N-Ver)..................................28

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4.4.3 WIFI232 Ethernet Interface Networking (As STA, Z-Ver).................................29
4.5 WI-FI parameter setting .............................................................................................29
4.5.1 Auto- Frequency Function..................................................................................30
4.5.2 Security................................................................................................................30
4.5.3 Search Function for STA.....................................................................................30
4.5.4 Address Binding..................................................................................................30
4.6 UART Frame Scheme................................................................................................31
4.6.1 UART Free-Frame ..............................................................................................31
4.6.2 UARTAuto-Frame...............................................................................................31
4.7 Network Setting..........................................................................................................31
4.7.1 Socket A..............................................................................................................32
4.7.2 Socket B..............................................................................................................32
4.8 New function...............................................................................................................32
4.8.1 TCP password authentication.............................................................................32
4.8.2 Upload ID ............................................................................................................33
4.8.3 WEB IO................................................................................................................33
4.8.4 Keepalive.............................................................................................................33
4.8.5 Multiple STAparameters.....................................................................................33
4.8.6 Websocket...........................................................................................................33
4.8.7 Fast access Wi-Fi(usr-link).................................................................................34
4.8Palmodic Signal....................................................................................................................36
4.9 Parameters Configuration..........................................................................................36
4.10 Firmware Upgrade......................................................................................................36
5WebAccessing and AT+instruction set ....................................................................................37
5.1 Configuration via WebAccessing..............................................................................37
5.1.1 Open Web Management Interface .....................................................................37
5.1.2 Quick Configure..................................................................................................38
5.1.3 Mode Selection Page..........................................................................................38
5.1.4 AP Interface Setting Page ..................................................................................39
5.1.5 STAInterface Setting Page.................................................................................39
5.1.6 Application Setting Page.....................................................................................40
5.1.7 Ethernet Setting ..................................................................................................42
5.1.8 HTTPD Client Mode............................................................................................42
5.1.9 WEB IO................................................................................................................43
5.1.10 Advanced Page...................................................................................................43
5.1.11 Device Management Page.................................................................................44
5.2 AT+instruction Introduction ........................................................................................44
5.2.1 Configuration Mode.............................................................................................44
5.2.1.1 Switch to Configuration Mode..............................................................45
5.2.2 AT+ Instruction Set Overview.............................................................................45
5.2.2.1 Instruction Syntax Format....................................................................47
5.2.2.2 AT+ Instruction Set...............................................................................48
5.2.2.2.1 AT+E..............................................................................................50
5.2.2.2.2 AT+ENTM......................................................................................50

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5.2.2.2.3 AT+NETP......................................................................................50
5.2.2.2.4 AT+UART......................................................................................50
5.2.2.2.5 AT+UARTF....................................................................................51
5.2.2.2.6 AT+UARTFT..................................................................................51
5.2.2.2.7 AT+UARTFL..................................................................................52
5.2.2.2.8 AT+TMODE...................................................................................52
5.2.2.2.9 AT+WMODE..................................................................................52
5.2.2.2.10 AT+WSKEY...................................................................................52
5.2.2.2.11 AT+WSSSID..................................................................................53
5.2.2.2.12 AT+ WSLK.....................................................................................53
5.2.2.2.13 AT+WEBU.....................................................................................54
5.2.2.2.14 AT+WAP........................................................................................54
5.2.2.2.15 AT+WAKEY...................................................................................54
5.2.2.2.16 AT+HIDESSID...............................................................................55
5.2.2.2.17 AT+MSLP......................................................................................55
5.2.2.2.18 AT+WSCAN ..................................................................................56
5.2.2.2.19 AT+ TCPLK...................................................................................56
5.2.2.2.20 AT + TCPDIS.................................................................................56
5.2.2.2.21 AT+ WANN....................................................................................57
5.2.2.2.22 AT+ LANN.....................................................................................57
5.2.2.2.23 AT+DHCPDEN..............................................................................57
5.2.2.2.24 AT+ DHCPGW ..............................................................................58
5.2.2.2.25 AT+ TCPTO...................................................................................58
5.2.2.2.26 AT+ MAXSK..................................................................................58
5.2.2.2.27 AT+TCPB......................................................................................59
5.2.2.2.28 AT+TCPPTB..................................................................................59
5.2.2.2.29 AT+TCPADDB...............................................................................59
5.2.2.2.30 AT+TCPTOB.................................................................................60
5.2.2.2.31 AT+TCPLKB..................................................................................60
5.2.2.2.32 AT+EPHY......................................................................................60
5.2.2.2.33 AT+STTC.......................................................................................60
5.2.2.2.34 AT+DOMAIN .................................................................................61
5.2.2.2.35 AT+FUDLX....................................................................................61
5.2.2.2.36 AT+MMID ......................................................................................61
5.2.2.2.37 AT+IDFIR.......................................................................................61
5.2.2.2.38 AT+IDEVE.....................................................................................62
5.2.2.2.39 AT+AABR......................................................................................62
5.2.2.2.40 AT+RELD......................................................................................63
5.2.2.2.41 AT+Z..............................................................................................63
5.2.2.2.42 AT+MID .........................................................................................63
5.2.2.2.43 AT+VER.........................................................................................63
5.2.2.2.44 AT+H..............................................................................................63
5.2.2.2.45 AT+ HTTPURL..............................................................................63
5.2.2.2.46 AT+ HTTPTP.................................................................................64

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5.2.2.2.47 AT+ HTTPPH................................................................................64
5.2.2.2.48 AT+ HTTPCN................................................................................64
5.2.2.2.49 AT+ HTTPUA................................................................................64
5.2.2.2.50 AT+WSSSIDA...............................................................................65
5.2.2.2.51 AT+WSSSIDB...............................................................................65
5.2.2.2.52 AT+WSSSIDC...............................................................................65
5.2.2.2.53 AT+WSKEYA.................................................................................65
5.2.2.2.54 AT+WSKEYB................................................................................66
5.2.2.2.55 AT+WSKEYC................................................................................66
5.2.2.2.56 AT+ WSLQ....................................................................................67
6WIFI232 Usage Introduction.....................................................................................................67
6.1 Module Debug............................................................................................................68
6.1.1 Software DebugTools.........................................................................................68
6.1.2 Network Connection............................................................................................68
6.1.3 Debug..................................................................................................................68
6.2 Use Cases..................................................................................................................71
6.2.1 Wireless ControlApplication...............................................................................71
6.2.2 Remote Management Application ......................................................................71
6.2.3 Transparent Serial PortApplication....................................................................72
6.2.4 Wireless DataAcquisition CardApplication.......................................................72
Appendix A: Questions and Answers.........................................................................................74
Q1: How to configure transparent serial port application (TCP protocol) with two WIFI
modules?...................................................................................................................................74
Q2: Where to Set WIFI Module LAN IP and WAN IP through Web Page？...........................74
Q3: How to configure transparent serial port application (UDP protocol) with two WIFI
modules?...................................................................................................................................75
Q4: Where to set WIFI232 module network protocol (TCP/UDP)?.........................................76
Q5: How to configure transparent serial port application: Two WIFI modules all configured as
STAand connection throughAP?.............................................................................................77
Q6: How to avoid IP address confliction when apply WIFI232 module?.................................78
Q7: PC works as server, all WIFI modules works as data acquisition card and connect with
PC, how to configure this application?.....................................................................................78
Q8: WIFI module support UDP multicast?...............................................................................79
Q9:WIFImodule operates in STAmode, the PC how to get the IP module?..........................80
Appendix b: external power shutdown mode reference design ............................................81
Appendix c: Disclaimer.....................................................................................................................81

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1 Quick Start
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 TCPIPSocket 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 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.
1.1 Hardware connect
In order to test WIFI module, we need connect module RS232 to PC and also WIFIto 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 USBWIFI network Card such as the following picture.
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 WIFI232 evaluation board for
users to choose.

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1.2 Network connection
The following is the WIFI232 module example,Other modules are the same.Open Wi-Fi, search
network, as shown in below, WIFI232 _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 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 connection
Now, nlink led of WIFI232 Evaluation Board is lighting.
1.3 communication test
Module’s default setting:
SSID:WIFI232;
Encryption mode:open，none;
UART:57600,8,1,None;
Network parameters：TCP,Server,8899,10.10.100.254;
IP:10.10.100.254;
We just need to follow the parameters of the corresponding set of network communication
parameters, you can make serial <--> WIFIcommunication, the steps are as follows:
1. Open test software TCP232-Test;
2. COM Settings area (left):
Choose COM port witch has connect the module, there is COM10, choose band rate to 57600,
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 -> ModuleWIFI -> PC WIFI.
WIFIto COM port: PC WIFI -> Module WIFI -> Module RS232 -> PC RS232.

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Figure 4 serial / network transmission test
2 Product Overview
2.1 General Description
WIFI232 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.
WIFI232 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.
WIFI232 as a hot spot can accommodate 32 clients simultaneously wi-fi access, but also can
accommodate 32 TCP client.
2.2 Device Features
Support IEEE802.11b/g/n Wireless Standards
Support TCP/IP/UDP Network Protocols

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Support UART/GPIO/Ethernet Data Interface
Support Work As STA/AP/AP+STA Mode
Support Router/Bridge Mode Networking
Support Internal/External Antenna Option
Support Transparent Transmission Mode
Support AT+ Instruction Set for Configuration
Support Friendly Web Configuration Page
Support Palmodic Signal
Support UART Auto-Frame Function
Single +3.3V Power Supply
FCC/CE Certificated
2.3 Device Paremeters
Table 1 WIFI232 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: +20 dBm (Max.)
802.11g: +18 dBm (Max.)
802.11n: +15 dBm (Max.)
Configurable
Receiver Sensitivity
802.11b: -89 dBm
802.11g: -81dBm
802.11n: -71dBm
Antenna Option
External:I-PEX Connector
Internal:On-board chip antenna
Hardware
Parameters
Data Interface
UART: 300bps - 460800bps
GPIOs
Ethernet: 100Mpbs
Operating Voltage
3.3V (+/-5%)
Operating Current
170mA~300mA
Operating
Temperature
-25℃- 85℃
Storage Temperature
-40℃- 125℃
Dimensions and Size
25×40×8mm
Software
Parameters
Network Type
Station /AP mode/STA+AP
Security Mechanisms
WEP/WAP-PSK/WAP2-PSK/WAPI
Encryption
WEP64/WEP128/TKIP/AES

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Work Mode
Transparent Mode/Serial command
AT command
AT+instruction set
Network Protocol
TCP/UDP/ARP/ICMP/DHCP/DNS/HT
TP
Max. TCP Connection
32
User Configuration
Web Server＋AT command config.
2.4 Key Application
Remote equipment monitoring
Industrial sensors and controls
Asset tracking and telemetry
Home automation
Medical devices
2.5 Package Information
2.5.1 Recommended Reflow Profile
Figure 5 Reflow Soldering Profile
Table 2 Reflow Soldering Parameter
Note:
1. Recommend to supply N2 for reflow oven.
2. N2 atmosphere during reflow (O2<300ppm).
2.5.2 Device Handling Instruction (Module IC SMT Preparation)
Shelf life in sealed bag: 12 months, at <30℃and <60% relative humidity (RH)
After bag is opened, devices that will be re-baked required after last baked with window time
168 hours.
NO.
Item
Temperature (Degree)
Time(Sec)
1
Reflow Time
Time of above 220
35~55 sec
2
Peak-Temp
260 max

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Recommend to oven bake with N2 supplied.
Baked required with 24 hours at 125±5℃before rework process for two modules, one is
new module and two is board with module.
Recommend to store at ≦10% RH with vacuum packing.
If SMT process needs twice reflow: T and reflow
Case 1: Wifi module mounted on top side. Need to bake when bottom side process over 168
hours window time, no need to bake within 168 hours.
Case 2: Wifi module mounted on bottom side, follow normal bake rule before process.
Note:
Window time means from last bake end to next reflow start that has 168 hours space.
2.5.3 Shipping Information
Figure 6 Shipping Information
TRAY Size: 420*245*34 mm
Note:
1 tray = 5*20 pcs = 100 pcs
1 box = 2 trays = 2*100 pcs = 200pcs
1 carton = 4 boxes = 4*200 pcs = 800pcs
3 Hardware Introduction

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3.1 Pins Definition
3.1.1 WIFI232 Pins Definition
Figure 7 WIFI232
PHY_TX+
PHY_RX+
nReady/GPIO9
RESET
UART_RTS/GPIO5
UART_TXD/GPIO3
GND
PHY_TX-
PHY_RX-
nReload/GPIO10
nLink/GPIO8
UART_CTS/GPIO6
UART_RXD/GPIO4
3.3V
Figure 8 WIFI232 Pins Map
Table 3 WIFI232 Pins Definition
Pin
Description
Name
Directio
n
Note
1
Ground--GND
GND
Power
Ground
2
VCC 3.3V@350mA
3.3V
Power
3.3V @ 350mA power input
3
UART Data Transmit
UART_TXD
O
If not use UART function,
this 4 pins can be configured
as GPIO pins, and can
change GPIO pin status
through AT command
GPIO
GPIO3
I/O
4
UART Data Receive
UART_RXD
I
GPIO
GPIO4
I/O
5
UART sends request
of data transmission
UART_RTS
O
GPIO
GPIO5
I/O
6
UART receives data
transmission
permission
UART_CTS
I

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GPIO
GPIO6
I/O
7
Module reset signal
RESET
I
“Low ( 0 )” effective reset
input.
The reset duration should be
kept more than 300ms
8
WiFi status Indication
nLink
O
“0”- WIFI connection
available
“1”- No WIFI connection
Can be configured as GPIO.
GPIO
GPIO8
I/O
9
Indicate the module
status of power on
process
nReady
O
“0” or “Palmodic Signal” -
Finish module boot up
process;
“1” - Module boot up not
finish.
Can be configured as GPIO.
GPIO
GPIO9
I/O
10
Restore configuration
nReload
I
Module will Restore factory
default configuration after set
this pin “0” more than 1s,
then set “1”.
GPIO
GPIO10
I/O
11
Ethernet Input+
PHY_RX+
I
+1.8V Ethernet Data
Interface
Support transformer and
direct connection (AC
couple) mode.
12
Ethernet Input-
PHY_RX-
I
13
Ethernet Output+
PHY_TX+
O
14
Ethernet Output-
PHY_TX-
O
3.2 Mechanical Size
WIFI232 modules physical size (25x40mm) as follows:
3.2.1 WIFI232
WIFI232 module Mechanical Size:

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Figure 9 WIFI232 Mechanical Size
3.3 Antenna
3.3.1 On-board Chip Antenna
WIFI232 supports a built-in antenna options, when customers choose a built-in antenna, must comply
with the following built-in antenna module placement of notes and general rules:
Be in the user's PCB board, and the red region ( 6X8mm ) corresponding to the region cannot be
placed components and with GND;
Antenna must away from the metal, at least to the distance around the higher components above
10MM;
Antenna cannot be shielded by any meal enclosure; All cover, include plastic, shall away from
antenna at least 10MM;
Figure 10 WIFI232 Chip Antenna Keep Out Region

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Waveshare technological suggestions WIFI232 module be placed in the following areas of user board,
in order to reduce the antenna and a wireless signal influence, at the same time, please consult with
technology and technical support staff to assist module placement and associated regions of Layout
design.
Figure 11 Suggested Module Placement Region
3.3.2 External Antenna
WIFI232 modules support internal antenna and external antenna option for user dedicated
application. If user select external antenna, WIFI232 modules must be connected to the 2.4G
antenna according to IEEE 802.11b/g/n standards.
The antenna parameters required as follows:
Table 4 WIFI232 ExternalAntenna Parameters
3.4 Evaluation Kit
Waveshare provides the evaluation kit to promote user to familiar the product and develop the
detailed application. The evaluation kit shown as below, user can connect to WIFI232 module
with the RS-232 UART port, 100M Eth port or Wireless port to configure the parameters, manage
the module or do the some functional tests.
Item
Parameters
Frequency range
2.4~2.5GHz
Impedance
50 Ohm
VSWR
2 (Max)
Return Loss
-10dB (Max)
Connector Type
I-PEX or populate directly

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Figure 12 WIFI232 module Evaluation Kit

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3.5 Hardware Reference Design
3.5.1 Hardware Typical Application
Figure 13 WIFI232 Hardware Typical Application
Notes：
nRST- Module hardware reset signal. Input. Logics “0” effective.
There is 100K Ohm pull-up resister internal up to 3.3V. When module power up or some issue
happened, MCU need assert nRST signal “0” at least 300ms, then set” 1” to keep module fully
reset.
nReady- Module boot up ready signal. Output. Logics “0” effective.
There is 4.7K Ohm pull-up resister internal up to 3.3V. The module will output “0” “or “Palmodic
Signal” after normal boot up. This signal used to judge if module finish boot up and ready for
application or working at normal mode.
nLink- Module WIFI connection indication. Output.
There is 4.7K Ohm pull-up resister internal up to 3.3V. When module connect to AP (STAmode)
or some WiFi STA connect to module (AP mode), the module will output “0”. This signal used to
judge if module already at WiFi connection status.
nReload- Module restore to factory default configuration.Input. Logics “0” effective.

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User can assert nReload signal “0” more than 3‟s through button or MCU pin, then release,
module will restore to factory default configuration and re-start boot up process. User need add
4.7K~10K Ohm pull-up resister external the module.
UART_TXD/RXD- UART port data transmit and receive signal.
There is 1K Ohm pull-down resister internal. User can‟t add pull-up resister at these pins.
3.5.2 10/100M Ethernet Interface
WIFI232 modules provide one 10/100M Ethernet PHY layer interface for data transition or user
configuration. This Ethernet support with transformer and without transformer (PHY-to-PHY) 2
kinds of connection.
3.5.2.1 Ethernet Connection with Transformer
User board put Ethernet transformer and RJ-45 connector. This is a general 10/100M Ethernet
phy layer connection. The reference design as following:
3.5.2.2 Ethernet Connection without Transformer
For this application, Ethernet will work as internal data transmition interface and save one
transformer and RJ45 connector. Ethernet PHY-to-PHY connection will use AC coupled
connection.This is a space and cost optimized solution. Hardware reference design as following:
Note: VCC signal at reference design shall base on user board PHY chipset voltage level, such
as 2.5V power supply for general Ethernet PHYchipset.

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This module Ethernet interface default is for the application with transformer connection. If you
need PHY-PHY directly connection, please change the hardware as follows:
1. Weld 0 ohm resistance in red position
2. Remove the component in yellow position
BOT side component TOP side component
Figure 14 Schematic resistance changes
Specific PHY-PHY direct connection reference to user manual chapter 1.3.2.2 application of
Ethernet without transformer andAT+FEPTP command
The command:
AT+FVEW=enable<CR> to open ethernet WAN port function
Remark:
1. Only when ethernet as WAN, this command is needed. Module default LAN port.
2. After this command, make sure module WAN IP and LAN IP in different segment. (Modify the
ALN IP inAP Settings, modify the WAN IP in STASettings)
AT+FEPTP=on<CR> Quey/set default ethernet PHY-PHY on/off
AT+FEPHY=on<CR> Open ethernet function permanently
AT+RELD<CR> Command with “F”need to be affective after AT+RELD
After module reset, command effect, then will not impact by Reload
For user‟s design, pls note:
1. Cable connection should beAC coupling, your cable need be pulled up to VCC (fit with PHY
chip level)
2. Cable TX connected to RX. In PHY-PHYdirect connection, PHYchip dose not support
direct/ cross self-adaption
3.Your PHY chip on board should better to be forced into 100M work mode
3.5.3 UART Interface
UART interface is the serial data transmition interface mainly used for WIFI232 modules.