WIFI-RS232 User Manual（v1.5）
Contents
1. Request is to set the first group of network parameters as follow BSSID 00 1a 70 35 b9 32 51th page 55 pages in all Channelf 5 SSID stauart_wrv_wep128 Encryption typel WEP Privacy key 128 bits choose the second group of privacy keys the keys are 0x30 0x30 0x30 0x30 0x30 0x30 0x30 0x30 0x30 0x30 0x30 0x30 0x30 Create the following order according to the parameters the part of blue J 10 O OO OO OO H pp nle Q H0 0u nle OO OO OO OO OO oo oo 4 5 3 The example of sending data gt Example 1 Request is to send the following data to WLAN module with send response mode This is a test text with ack Create the following data frame according to the request aa 9d 00 le fd 54 68 69 73 20 69 73 20 61 20 74 65 73 74 20 74 65 78 74 20 7 69 74 68 20 61 63 6b 2e e OO 00 00 00 OO 00 gt Example 2 Request is to send the following data to WLAN module with continuous sending This is a test text without ack Create the following data frame according to the request aa ic OO 20 35 54 68 69 73 20 69 73 20 61 20 74 65 73 74 20 74 65 78 74 20 77 69 74 68 6f 75 74 20 61 63 b 2e 00 00 00 OO 00 OO 52th page 55 pages in all 4 5 4 CRC 8 Algorithm Reference Implementation INT8U __crc8_tbl 256 0x00 0x91 0xe3 0x72 0x07 0x96 0xe4 0x75 Ox0e 0x9f 0xed 0x7c 0x09 0x98 0xea 0x7b Ox 1c 0x8d 0xff 0x6e 0x1b 0x8a 0xf8 0x69 0x12 0x83 0xf1 0x60 0x 15 0x84 0xf6 0x67 0x38 0xa9 0xdb 0x4a 0x3f 0xae 0xdc2. This problem will exist when TCP format is used Question why is the network delay at using WLAN module be bigger than the normal instance Inspect that the wireless network mode of AP is B or B G mixed mode or not Question how does the transparent transmission mode be droped out Turn off the power of AP afresh turn on the WLAN module use the client software to modify the configuration parameters and then it s complete 32th page 55 pages in all 4 Serial Protocol 4 1 summarize UART interface data control data user data Interface Data The format and transfer mechanism of the data transports between user terminal and WALN module through UART serial is prescribed by the corresponding serial protocol Serial data may include control data and user data this two different types Control Data The control order definition and mechanism of control message transfer between user terminal and WALN module is prescribed by the User Serial Control protocol User Data It indicates user s private data its protocol is defined by user 33th page 55 pages in all 4 2 UART serial protocol 4 2 1 Data Format 1 l 2 l 6 byte byte byte byte LENGTH byte SYNU Synchronized Field it indicates the start of a data frame the fixed value is OxAA CTL Control Field its meaning is as follow Bit Bit6 d Bit3 0 i IE TYPE frame type OOOb it indicates the control data 001b
3. data transmission in RAW UDP and TCP data formats 2 5 1 RAW format It s the raw data format this format no longer do the additional encapsulation to the user data in the transmission process of Link Layer but directly change to 802 11 network frame to transmit In this format WLAN module uses the MAC address of the server as the target address of data transmission Data transmission model is as follow User Interface protocol User Data User Data p User Host k WLAN Module u 1 ad Il MAC protocol User Data It so i u N n i aa sever Ar 11th page 55 pages in all 2 5 2 UDP format UDP that is User Data Protocol It s Connectionless Data Transmission Protocol in TCP IP protocal stack UDP protocol supports unreliable data transfer and does not guarantee the integrity of the data But UDP uses little network sourceand supports quick data manage therefore it s suit for the occasions that the demand of transmission real time is strict but the demand of data integrity is low rise such as Audio and video data transmission In addition using UDP format can achieve the data broadcast When Link Layer of the WLAN module uses UDP format the information include device IP address server IP address and service port number must set accurately if server and WLAN module are not in the same subnet subnet mask and gateway are must be set otherwise they wouldn t be able to communicate the setting of IP add
4. BSSID to be the mark of different network Channel It indicates the channel of the target network This module supports Channel 1 14 SSID It indicates the SSID used by the target network E Encryption Type 7th page 55 pages in all It indicates the encryption type used by the target network the encryption types this module supports include Non encrypted WEP CCMP WPI m Key It indicates the key used by the target network According to different types of encryption key is not the same format Mm Data format of the Link Layer This module supports three data formats RAW UDP TCP Mm Physical Address of the Server It indicates the MAC address of the Data Center Server only used in RAW format m IP Address of the Device It indicates WLAN module its own IP address only used in UDP TCP format Mm IP Address of the Server It indicates the IP address of the Data Center Server only used in UDP TCP format Mm Service Port It indicates the server port number only used in UDP TCP format 2 3 Connection Model WLAN module supports automatic and manual this two modes for users to choose It should be regarded that in the 1 3 and previous versions when the WLAN module is set to TCP Link Layer approach the process of networking automatically includes the process of networking with the TCP server 2 3 1 Automatic Networking In automatic Networking mode without any user intervention WLAN module automatically scan and conn
5. all able to answer for comeback At using TCP format in Link Layer strongly adviced user should enable ACK at the time sending data through UART serial namely use the sending responsion manner to further ensure the reliability of transmission The data transmission midel of using TCP format is as follow 13th page 55 pages in all User Interface protocol User Data I I fir iskt WAN Module k E ser ae gt TCP Monitoring mode When Link layer is set to TCP format WLAN module can not only be used as the client to connect to the TCP server set in the network parameter but also work as TCP server after starting monitoring mode To set system parameter can enable or close TCP Monitoring mode when the data format of Link Layer isn t TCP this parameter can be neglected According to the status of TCP monitoring mode the networking process of WLAN module is different E Close TCP Monitoring WLAN module has associated with AP successfully then automatically connect to the server contents with the network parameter setting and returns the message of successful networking to user side after building TCP connection with the server otherwise return failed message At the time the process of the module is the same with theWLAN module of 1 3 and previous versions which do not support the TCP Monitoring mode E Enable TCP Monitoring WLAN module returns the message of successful networking to user side after connect with A
6. always be incorrect The express method the client software of this system used may be different from your AP and need to do the format conversion the following is a example used 64bits WEP key to express the conversion method The key of AP uses hexadecimal format In case the key of AP is 10 hexadecimal numbers 1234567890 The after conversion express as 5 hexadecimal numbers 0x12 0x34 0x56 0x78 0x90 The key of AP uses ASCII format In case the key of AP is 5 ASCII bytes abcde The after conversion express as 5 hexadecimal numbers 0x61 0x62 0x63 0x64 0x65 Please refer to the normal ACSII character set about the express of ASCII byte s hexadecimal common christcross row and number can use the following method to count The hexadecimal number of character A is 0x41 the charater B is 0x42 and reckon as this The hexadecimal number of character a is 0x61 the charater b is 0x62 and reckon as this The hexadecimal number of character 0 is 0x30 the charater 1 is Ox31 and reckon as this DO Question why is that thing at using TCP format failed connection or rapid disconnection after successful connection always appear TCP connection is a imaginary connection if the network connection disconnects abnormally such as power off and manual reset then the connection between WLAN moduleand the srver can t backout normally and this causes reconnectd to the server failed the method of reso
7. coverage of the network WLAN module may do automatic scan until scanning practicable network This module can set at most seven target network at the same time When more then one target networks in the current area WLAN module may connect automatically to the first practicable network 2 3 2 Manual Networking In the manual networking mode users need to control connection and disconnection of WLAN module by order 2 4 Encrpytion WLAN module supports WEP WPI CCMP these three data encypytion mode and non encryted OPEN mode gt WEP In the encrpytion mode of WEP user can set 4 groups of key and choose one group as tolerant sending key the length of the key is divides into two styles 64 bit and 128 bit Mm 64 bit key Besides 24 bits stochastic data the length of the key user needs to set is 40 bits as 5 bytes E 128bit key Besides 24 bits stochastic data the length of the key user needs to set is 104 bits as 13 bytes gt WPI 10th page 55 pages in all In the encrpytion mode of WPI user needs to set 32 bytes key broadcast is achieved from AP automatically gt CCMP In the encrpytion mode of WPI user needs to set 16 bytes keybroadcast is achieved from AP automatically 2 5 Data transmission In networking status WLAN module transmit automatically the effective data that has received between user serial UART and wireless network serial According to the user setting the Data Link Layer of WLAN module can do the
8. group of network configuration parameters is used others no defined 39th page 55 pages in all 4 3 5 Message of Network Connected l byte byte alterable length e an a l 6 l byte byte byte FLG 0x41 RES O indicates connection is successful Others connection is failed and the latter fields after RES are insignificant CH channel number BSSID BSSID of network LENI the length of SSID SSID SSID of network 4 3 6 Order of Starting to Disconnect Network l l byte byte FLG 0x02 RES OQ disconnects normally Others disconnect singularly 40th page 55 pages in all 4 3 7 Message of Network Disconnected l l byte byte OO FLG 0x42 RES OQ disconnects normally Others disconnect singularly 4 3 8 Setting Parameter Order l l Alterable length byte byte ho SA ye l l LEN byte byte FLG 0x03 PB group number of network parameter the range of value is 0xb1 0xb7 they express1 7 group of parameters Parameter PB is choice field this field can be not included if it s only setting system parameters MI Parameter ID its definition is as following table Para ID Parameter Meaning 41th page 55 pages in all 0x00 Reserved 0x01 BSSID 0x02 Channel 0x03 SSID 0x04 Encryption Type 0x05 Secret Key 0x06 Data format of Link Layer 0x
9. it indicates the common data 010b it indicates the ACK acknowledgement to the previous frame LENGTH field must be 0 Others is reserved A this bit in data frame must be set as 1 it indicates the data frame includes CRC and the receiver needs to return ACK acknowledgement it has nothing in ACK frame SN is the short of sequence number the range of its value is 0 15 in data frame if it is the retry of the previous frame then sequence number retain invariable or the sequence number rise 1 every time ln ACK acknowledgement frame SN is equal to the sequence number of the previous frame received LENGTHD LENGTH field it indicates the length of DATA field the most longth is 1400 bytes 34th page 55 pages in all CHKO Frame Head Verification field its count is 8 bits Circle Reundancy Check sum of CTL and LENGTH this two fields DATA Actual transfer data if A is set 1 the last byte of DATA is 8 bits Circle Reundancy Check sum of the previous LENGTH 1 datas PADDING Fill field of frame end its value is 6 continuous 0x00 4 2 2 Transfer Mechanism According the types of the frames two different transfer mode are used gt Send response Mode The data frame which A is set 1 uses this transfer mode The sender needs to wait for the responsion from the receiver after the sender has sent a frame of data then it starts to send the next frame it is as follow sender receiver Inspection i
10. page 55 pages in all are 0 RAW 1 UDP 2 TCP gt Port Its length is 2 bytes it indicates service port the order of its bytes uses BigEndian namely the port number 6000 indicates 0x17 0x70 gt StalpAddr Its length is 4 bytes ansd indicates the IP address of WLAN module itself the order of its bytes uses BigEndian namely the address 192 168 1 1 indicates OxCO OxA8 0x01 0x01 gt SubnetMask Its length is 1 byte it indicates the subnet mask of the network which WLAN module is in its effective value is 0 no setting 1 subnet mask 255 255 255 0 N subnet mask 255 255 0 0 3 subnet mask 255 0 0 0 others reserved gt SubnetGate Its length is 4 bytes it indicates subnet gate IP address of the network which WLAN module is in and its format is as above It needs to note that according to the SubnetMask value the value of SubnetMask chooses different sffective field others are ignored such as SubnetMask 1 SubnetGate 0 192 SubnetGate 1 168 SubnetGate 2 1 SubnetGate 3 1 49th page 55 pages in all Then only SubnetGate 3 is effective others are ignored gt SerIpAddr Its length is 4 bytes it indicates the IP address of data center server the format is as above gt SerMacAddr Its length is 6 bytes and it indicates the MAC address of data center server only be used at RAW format 4 5 Programme Guide 4 5 1 The Example of Network Control
11. 07 Service Port 0x08 IP address of device 0x09 IP address of server Ox0a MAC address of server Ox0b Subnet Mask Ox0c IP address of gateway Ox0d Reserved Oxa0 Oxal Serial type Oxa2 Serial paud rate Oxa3 B G mode Oxa4 Tiptop speed Oxa5 Send power Oxa6 MAC address of device Oxa7 Networking mode Oxa8 the degree of automatic connection after failness Oxa9 Transparent transmission mode Oxaa TCP monitor mode Reserved the parameters set by the manufacturer can only be read by user 42th page 55 pages in all LEN length of INFO field INFO parameter content 4 3 9 Message of Setting Parameter Result l l byte byte FLG 0x43 RES OQ successed others failed 4 3 10 Inquiring Parameter Order l l byte byte Alterable length FLG 0x04 PB group number of network parameter and its definition is same as setting parameter order MI parameter ID and its definition is same as setting parameter order 43th page 55 pages in all 4 3 11 Message of Inquiring Result l byte byte Alterable length byte byte FLG 0x44 PB group number of network parameter MI parameter ID and its definition is same as setting parameter LEN length of INFO field INFO parameter content 4 3 12 Reset Order l l byte byte Ai FLG 0x05 RES no defined 44th page 55 pages in all 4 3 13 Message of Finished Initialization l l l Alterable length byt
12. 0x4d 0x36 0xa7 0xd5 0x44 0x3 1 0xa0 0xd2 0x43 0x24 0xb5 0xc7 0x56 0x23 0xb2 0xc0 0x51 Ox2a Oxbb Oxc9 0x58 0x2d Oxbc Oxce Ox5f 0x70 0xe1 0x93 0x02 0x77 0xe6 0x94 0x05 0x7e Oxef 0x9d 0x0c 0x79 0xe8 0x9a 0xO0b Ox6c Oxfd Ox8f 0x 1e 0x6b 0xfa 0x88 0x 19 0x62 0xf3 0x8 1 0x10 0x65 0xf4 0x86 0x17 0x48 0xd9 0xab 0x3a 0x4f 0xde Oxac 0x3d 0x46 0xd7 0xa5 0x34 0x41 0xd0 0xa2 0x33 0x54 0xc5 0xb7 0x26 0x53 0xc2 0xb0 0x21 Ox5a 0xcb 0xb9 0x28 0x5d 0xcc 0xbe 0x2f Oxe0 0x71 0x03 0x92 0xe7 0x76 0x04 0x95 Oxee 0x7f 0x0d 0x9c 0xe9 0x78 0x0a 0x9b Oxfc 0x6d 0x 1f 0x8e 0xfb 0x6a 0x 18 0x89 Oxf2 0x63 0x 11 0x80 0xf5 0x64 0x 16 0x87 Oxd8 0x49 0x3b 0xaa Oxdf 0x4e 0x3c 0xad 0xd6 0x47 0x35 0xa4 0xd1 0x40 0x32 0xa3 Oxc4 0x55 0x27 0xb6 0xc3 0x52 0x20 0xb1 Oxca 0x5b 0x29 0xb8 0xcd 0x5c 0x2e 0xbf 0x90 0x01 0x73 0xe2 0x97 0x06 0x74 0xe5 0x9e 0x0f 0x7d 0xec 0x99 0x08 0x7a Oxeb Ox8c 0x 1d 0x6f 0xfe 0x8b 0x 1a 0x68 0xf9 0x82 0x13 0x61 0xf0 0x85 0x 14 0x66 0xf7 Oxa8 0x39 0x4b Oxda Oxaf Ox3e Oxdc Oxdd Oxa6 0x37 0x45 0xd4 Oxal1 0x30 0x42 0xd3 0xb4 0x25 0x57 0xc6 0xb3 0x22 0x50 0xcl1 Oxba 0x2b 0x59 0xc8 0xbd 0x2c 0x5e 0xcf INT32S ChkCrc8 INT8U ptr INT32U len INT8U crc8 data crc8 0 53th page 55 pages in all while len 0 data ptr crc8 __crc8_tbl crc8 data if crc8 0x00 return 0 else return 1 INT8U GetCrc8 INT8U ptr INT32U len INT8U crc8 data crc8 0 while len 0 data ptr
13. 3th page 55 pages in all Serial Configure COM1 115200 4 8 ByteSize No Parity 1 Stopbit V ACK Control Reset Parameters 1 Transmition 100 ms repeat per Stop Send TXT Sel File Send File j Clear Status Bss info Not connect Output Cmd Join to bss 1 Info Join successfully Info Leave Bss Cmd Leave bss Info Leave Bss Cmd Leave bss Info Leave Bss Cmd Join to default Info Leave Bss Cmd Join to default Info Join successfully d Leave bss Info Leave Bss 2 TX bytes RX bytes 10 Click Leave button 2 Disconnect successfully gt Scan the network 24th page 55 pages in all Serial Configure 5200 4 8 ByteSize Ho Parity 1 Stopbit V ACK Control 1 Scan Leave TCP Reset Parameters Transmition EI repeat per 100 ms Stop Send TXT Sel File Send File Status Bss info Not connect Output Cmd Msz Serial data Cmd Scan network 00 Oa 79 cl e6 70 06 0s 00 00 00 30 00 24 01 38 91 a3 06 0a 00 00 00 06 08 10 T4 2a 6T 4a 02 1 e e3 96 4a 10 00 23 ed S1 al 4e 00 1 a 70 35 L9 30 00 1 a 70 35 b9 31 00 1b 2 56 df 5e 10 10 OOOATSC1E431 hedwmm dlink HED_APOwhz ag3 lin mm ag3 linux linksys zhmhl linksys_zhmh2 TX bytes RX byt
14. P successfully then WLAN module get in TCP Monitoring mode it can accept extrinsic TCP connection requests If user wish it works as the client to connect to the server you can use TCP Connection Order Control to initiate the connection request This module does not support building multiple TCP connections at the same time if currently a TCP connection already exists it can no longer receive or send new connection requests 14th page 55 pages in all 3 Test Environment Guide WLAN module is as a functional unit can only run during embedding in the system Therefore we support the following simulation running environment for users to do the module function testing 3 1 Summary Run the server software Run the client software PC Interface Tester 1 WLAN module Tester 2 All of the running environment is constituted with the following devices gt Tester 1 It uses to run the client software of WLAN module and communicates with WLAN module through the computer serial the function achieved includes 15th page 55 pages in all 1 Send control order to WLAN module 2 Receive and analyse the message send by the WLAN modulel 3 Set demand the configuration parameters of WLAN module A Cooperate with server software to run data transmission testing gt WLAN module It s composed by the STAU network card supports UART serial running this software the function achieved includes 1 Wirel
15. Parameter guery edif ornon see Ee ese EE GED E Be gs De eg eke be Eseg ge eke 19 342 Parameter Explanation m roae ra ke ee RS BE age RE REGS ee EER De BEREG RO Ei 20 3 5 Automatic networking cece se see se ee ee ee ee Ge AR ee ee Ge Re Se ee 21 3 6 Man alnetworking ssr N N N OR EE ON 22 3 7 TER Monitor Mode Testarea r r Re eE es S RS E S SiS 25 3 8 TestTransier Test a n est sects e gee Re eea E To a EEs 27 3 9 Document Trabsfer Test sonten sesse see se ee ee EE Ge RA Re Re ee Ge GR Se ee 28 3 10 The Answers of Familiar Questions iese see es ee ee Re RR AR Re RR ee 30 SERTALPROTOEO S So ese ill Gegee ee earns aunt bee ek gee bee ESE gs 33 4 1 SUIMMALIZEs 2 ses cosets ech Eo E e EE E E O doce ne EEA Soen eels 33 4 2 UART Serial protocol 5 2 25 ses see Ese ces a Gee es Ee Gee Ge SEE ge Re Vee tee 34 AON Data BOT EE N EE EE ER N 34 4 2 2 Transfer Mechanism cece se ee se ee ee Ge Ge Rd ee ee Ge Re ee ee ee ee 35 4 2 3 Serial Configuration 23 0 see ano are RR DE a ER 36 4 3 User Serial Control Protocol ietsie SE eo eer ierse Bee Vee Ee eed 36 4 3 1 Data Formata nean aise Gernot eee De EE Bb Atanas aleve 36 4 3 2 Order of Starting to Scan Network cies ek ee Se ee Ge Re Re ee ee ee 38 4 3 3 Message of Scanning Network Result esse ese se ee ee Re ee 38 4 3 4 Order of Starting to Connect to Network oo see see ee ee Ge Re ee ee ee ee 39 4 3 5 Message of Network Connected esse ese se ee ee ee Ge Re ee G
16. WIFI RS232 User Manual v1 5 Ith page 55 pages in all TABLE OF CONTENTS OVERVIEW EE RE EER OR EE Ee 4 1 1 M in FUNCION sissen e EE OE ter OE EE EE RE 4 1 2 Typical Applications eers Ee ge ESE eats haven De eye er eg ee ve beter 5 1 2 1 Wireless POS Machine ese see se se ee ee ee ee e r ee GR ee ee ee ee 5 1 2 2 Wirelsee Monitoring and Control System ou see se se se Ge ee Se ee ee ee 5 WORKING PRINCIPLE iiie esse eene Ee ese SEE Ee cee Heb Ee See see Vee Ee De Se ee ee Ge EE ge eg on 6 2 1 Block Diagrams EE inna es Dee ee ei gee ed 6 2 2 Parameter management iese ESEG Te Ee DR Seg ee ek EN de Dk eg EE see EN ee ER bee Vb Ge Ee deed 6 2 3 Interconnection Model si ss ESE EER Ee See GEES Eet Gee SEE GR Gegee ego e 8 2 3 1 Automatic Netw Orkin geese ei EES Se SE send ete Gee ee ed 8 2 3 2 Manual Networking 0 0 eee cee Ge Ge Se ee Ge ee ee Ge ee ee ee 10 2 4 Enerpyti AA EE OE ae 10 25 Data transmission oi BEE hn Bishan acento ho nia Rit ie 11 2 3 1 RAW format ossessi sesoses essre ee ok SEE VN Seg RE Ee Ese ee SE sedes 11 2 52 UDPTormat EE a S 12 N OR se EE OR EE EE OR OE EE 13 TEST ENVIRONMENT GUDE st ese gs ee Eg ee de Se ee ee ee a Gede sek Sen eg Gee Bed dee 15 3 1 ES ARE RE EER EE EE EE EE Mebees 15 3 2 el EL N Abe ER EO IE 17 3 3 SOLVER SoftWare rerne erip Ed gee ea ee EG gee ae ee ee IEEE ed se Eg 18 3 4 Parameter management sissies Ses ses aeie codecs ousesusnsbl Gegee Ve GES see gs Ee 19 3 4 1
17. arameters are used to control the working mode of all the module configuration parameter is divided into two types system parameter and network parameter 6th page 55 pages in all gt System Parameter It s the parameter setting that used to control the work mode of the module it include Networking Mode WLAN module supports two types mode automatic networking and manualnetworking Transparent Transfer Mode WLAN module supports transparent transfer mode at serials In need of special note is that when it s in the automatic networking and uses UDP protocol in Link Layer at the same time this mode can just be effective TCP Monitoring Mode WLAN module supports the use of TCP listening mode when TCP protocol is used in Link Layer after this mode is used the WLAN module can be used as a TCP server waiting for client s connection requests Baud Rate of Serial WLAN module supports four kinds of baud rate 19200 38400 57600 115200 Device Physical Address It s the MAC address of WLAN module gt Network Parameter It indicates the parameter that connecting to the target network needs to set this module supports to set seven target networks so users can set seven groups of network parameter Each group of network parameter include BSSID The BSSID of target network Its value is the MAC address of the AP used in target network Each AP owns their only and not repeated MAC address then this module uses
18. ata Certer server WLAN Hodule Inside In a Wireless Bus System based on the WLAN technic carheld or handheld POS machine in each bus equips with a WLAN module based on UART serial and AP is fixed in the Bus Terminus When bus reachs in the terminus wireless POS machine always does the indentification automaticly then connects to the AP and Operational Data in POS mechines is uploaded to Data Center Server in Bus Terminus through AP 1 2 2 Wirelsee Monitoring and Control System Y Terminal 1 eS Terminal 2 N Terminal 3 N Honitor and control D Center Server Terminal n FLAN Hodule inside Serial devices networking TCP IP has been a trendy of Industrial site 5th page 55 pages in all networking but Field wiring and the following construction transformation cost often become a bottleneck of serial devices networking WLAN modules embed in these Monitoring and Control Terminals which support serial not only can absolves the difficulty of wiring but also reduces the construction cost and it especially adapts to the devices about Industrial Environment and Factory Automation Systems Site Monitoring System and etc 2 Working Principle 2 1 Block Diagram Information and call gt Control Data Flow gt Protocol Data Flow a Common Data Flow p Hixed Data Flow 2 2 Parameter management WLAN module supports configuration parameters which can be modified these p
19. dow 26th page 55 pages in all 3 8 Text Transfer Test WLAN module connects successfully then use the client and server software at the same time to do the text transfer test as the following drawing Serial Configure Output com g7 Cmd Msg Serial data s200 Cmd Leave bss Info Leave Bss 8 ByteSize Text Ho Parity OER Hello 1 Stopbit Cmd Join to default D BEER Info Leave Bss V ACK Cmd Leave bss Info Leave Bss Cmd Join to bss 1 Control Info Join successfully Scan Leave TCP Reset Parameters Transmition Input repeat per 100 ms En a Wireless Bus System based on the WLAN technic carheld or handheld POS machine in each bus equips with a WLAN module based on UART serial and AP is fixed Step ff Sena TXT D in the Bus Terminus When bus reachs in the terminus wireless POS machine always does the indentification automaticly then connects to the AP and Operational Data Sel File Send File in POS mechines is uploaded to Data Center Server in Bus Terminus through AP Status Bss info TX bytes 0 Ssid aq3_lin Channel 3 Bssid 08 10 T4 2a 6T 4a RX bytes 6 27th page 55 pages in all TLANNTEST ServerVl 32EN he AP and Operational Data in POS mechines is uploaded to Data Serveris bus Terminus through AP Transmit window 3 9 Document Trabsfer Test The client and server software al
20. e byte byte FLGL 0x45 TYP reset type 0 hardware reset 1 software reset others no defined VI version expression and mixed value 0x76 INFO character strings of firmware version message 4 3 14 TCP Connection order l l byte byte FLG 0x06 RES 0 connection is built 1 disconnected Other reserved 45th page 55 pages in all 4 3 15 Message of TCP connection Status l l byte byte ram FLG 0x46 RES 0 connection has successed 1 connection has been disconnected 2 connection is busy 3 not join the network 4 orders don t support others reserved 4 3 16 Message of TCP Failed Sending l l byte byte tn ad FLG 0x47 RES no defined 4 4 Configuration parameters WLAN module can support for user configuration parameters their definition is as follow 46th page 55 pages in all 4 4 1 System parameters gt Baudrate Its length is 1 byte and indicates the paud rate setting chose of UART serial 0 19200 1 38400 2 57600 3 115200 gt AutoConnect Its length is 1 byte and indicatesthe network mode of WLAN module 0 manual 1 automatic gt Transparent Its length is 1 byte and indicates the choose of transparent transfer mode 0 close 1 enable this mode is omly effective in automatic networking and UDP data format gt TepServerMode Its length is 1 byte and indicates the choose of TCP monitor
21. e ee ee 40 4 3 6 Order of Starting to Disconnect Network sees ee se se Ge Re ee Se ee 40 4 3 7 Message of Network Disconnected ee ese ee se ee ee Re ee 41 4 3 8 Setting Parameter Order sesse se ee ee ee Ge GR Ge Re ee Ge Ge Re ee ee ee ee 41 4 3 9 Message of Setting Parameter Result ees esse ee se ee ee ee ee 43 4 3 10 Inquiring Parameter Order e sesse ee se Ge GR Re Ge ee Ge Re Re Se ee ee 43 4 3 11 Message of Inquiring Result esse se se se ee ee GR GR ee ee ee 44 2th page 55 pages in all 4 4 4 5 4 6 AS 12 R set Order esse Ee EE Do awe ER Ee EED Ge Ee ee ee Ee Ee us ge 44 4 3 13 Message of Finished Initialization 2 0 0 0 eee ccc ee se ee ee Ge ee ee 45 4 3 14 TCPConnectton ord er is ei BES sagen cost Ar ees See EE Rue bees gegee ese 45 4 3 15 Message of TCP connection Status occ ec se see ee ee Ge Re Re Se ee ee 46 4 3 16 Message of TCP Failed Sending ees se se sk ee ee ee Re Ge Re Re Se ee ee 46 Configuration parameters iese ese ee se Ge GR Re ee ee ee Ge GR Re Se ee Ge ee 46 441 System parameters oran ee ee se E ee ee Ee dee E Se ee ee ee ee Be ee ee 47 AAD Network parameters De E EN DE Re SE Ge Bee bee 47 Programme Guide ii siese See gee Ee GR gee E TE Se Ge eg Gee Gee 50 4 5 1 The Example of Network Control sesse se se se ee se ee ke AR Re Se ee ee 50 4 5 2 The Example of Parameters Setting esse esse se se se see se ee ke Re Re Se ee ee 51 4 5 3 T
22. ect to the network after the power on reset If a situation occurred as the following WLAN module will automatically re connect 1 Connection is failed 2 Network is disconnected 8th page 55 pages in all 3 The target network is rescanned Af Server disconnects the TCP connection when TCP Data format is used If a situation occurred as the following WLAN module will automatically scannetwork status 1 The AP of the target network is off 2 WLAN module leaves the signal coverage of AP Its work processes as follows Scan network Compare the scan result with the set parameters Connect to the network Network disconnects Network has connected In automatic mode all networking process is completed bu WAN module automatically without any user intervention to provide for users with one of the most 9th page 55 pages in all simple way to success to connect the network users only need to set at least one group of basic parameters once at the first use Then WLAN module will scan the network in each power on reset automatically if the target network is Detected networking will be connected automatically and user can receive the the message of success networking after successful connection then user can transport data normally If the network disconnected accidentally in the middle the module can do automatic connection In the case the AP in the network is off or WLAN module has leaved from the signal
23. er in the message of scanning network result is modified to the denotation of network signal intension 55th page 55 pages in all
24. erc8 __crc8_tbl crc8data return crc8 4 6 Modification Note of Serial Protocol gt Version 1 3 modifies as follow based on version 1 0 1 The most length of LENGTH field in data format definition of UART serial protocol modifies to 1400 2 Data format definition of user serial protocol is increased TCP failed sending message 3 The definition of the IDX parameter which is the start connection order is modified to the index number of network parameters group 4 parameter setting order parameter inquiry order parameter inquiry message of user serial protocol is increased PB field 5 Parameter ID value M field expresses in parameter setting order parameter inquiry 54th page 55 pages in all order parameter inguiry message of user serial protocol is afresh defined 6 The initialization completion message of user serial protocol is increased the definition of TYP V and INFO field gt Version 1 4 modifies as follow based on version 1 3 1 Data format definition of user serial protocol is increased TCP connection order status message 2 System parameter setting is increased the TcpServerMode parameter gt Version 1 5 modifies as follow based on version 1 4 1 Network parameters configuration is increased the subnet mask and subnet gate parameters 2 The length of the wireless privacy key in network parameter is changed to 54 bytes from 64 bytes 3 Beginning from Version 1 53 IDX paramet
25. es 10 click Scan button 2 return the scan result 3 7 TCP Monitor Mode Test 1 Exactly set the network parameters and enable TCP monitor mode 25th page 55 pages in all Wireless Network Param Group Channel _ BSSID SSID lt i ata Type Local IP Mask Gateway 08 10 74 2a 67 4a aq3_lin TEE t 192 168 1 203 255 255 255 0 192 168 1 1 Privacy Type OPEN WEP WPI CCHF Server IP 192 168 1 100 server Fort 6UUU gt Server MAC 00 15 58 e0 7d b9 System AutoConnectAP OFF v TCP Server Mode O Serial Baudrate 115200 vw Transparent Mode OFF v Local BAC 00 1 e e3 d8 de bb Tork Mode NORMAL 2 WLAN module gets in monitor status after successful networking 3 Use the Internet Explorer program in tester 2 and connect to WLAN module as drawing method fill in IP address and port according to actual setting value 4 WLAN module receives the request and connects to IE with TCP the client software will show the message of successful TCP connection and HTTP request data sent by IE from this connection SU Input random character string in the input window of the client software click text sending then click the TCP connection button and choose disconnect to disconnect the TCP connection show as the following drawing 6 User can see the content of the text input in the client software in IE win
26. ess networking function 2 Data transmission between serial and wireless network gt AP It s used to build a wireless network gt Tester 2 It s used to run the server software of WLAN module this computer must have network connection the function achieved includes 1 Do the data transmission testing with client software 2 Be the upgrating online server of WLAN module firmware 16th page 55 pages in all 3 2 Client Software Serial Configure Output COM g9 Cmd Mse Serial data 115200 Cmd Scan network Notice Mod 8 ByteSize Info Module reset Hard VER 1 51 rel produced at 08 36 32 Apr 30 2009 No Parity 1 Stopbit j Panel oa MEE cma Sean ER AG eS 3 V ACK No Ere Cmd Scan network Control Notice Module disconnecte Cmd Scan network Cmd Scan network i Notice Modul dis Te gE Cmd Scan network Notice Mod dule disconnected Leave Reset Parameters Transmition Input repeat per 100 ms Send TXT Sel File Send File Clear Status Bss info TX bytes 0 Not connect RX bytes 0 The client software connects to WLAN module through the computer serial and achieves the following functions gt Serial Configure The choose of serial baud rate includes 19200 38400 57600 115200 gt Sending control order Send control order to WLAN module by clicking the buttons the order supports include sca
27. eters 000100b inquire the parameters 000101b reset initialization 000110b TCP connection 37th page 55 pages in all 000111b TCP failed sending Others reserved PARAMETERS They are defined according to the difference of TYPE and SUBTYPE 4 3 2 Order of Starting to Scan Network l 3 byte byte ri PORTMASK FLG 0x00 PORTMASKI channel mask the first byte represents 1 8 channels therein BitO represents Channel 1 Bitl represents Channel 2 and others calculate as this in turn The low 6 bits represent 9 14 channels 4 3 3 Message of Scanning Network Result alterable length Nag l l 6 l LEN byte byte byte byte 38th page 55 pages in all FLG 0x40 IDX In the firmware of which the version is less than or equal to 1 51 it indicates network number and used to return the index number of result of scanning network the number begins from 1 each network number rises 1 Beginning from the Version 1 53 firmware this parameter is indicated to intension of signal and used to return the intension of signal of the target network the range of its value is 0 255 0 indicates the best intension 255 indicates the lest intension CH Channel number BSSID BSSID of network LEN the length of SSID SSID SSID of network 4 3 4 Order of Starting to Connect to Network l l byte byte FLG 0x01 IDX OQ and indicates tolerant configuration network 1 70 indicate which
28. figure Output COML Cmd Msz Serial data 115200 md Join to default 7 Info Join successfully 8 ByteSize Info Leave Bss No Parity 1 Stopbit Close V ACK Clear Control Scan Join i l Leave TCP l Reset Parameters Transmition I repeat per 100 ms Send TT Send File Bss info TX bytes 0 Not connect RX bytes 0 3 6 Manual networking Manual networking mode supports a more flexible use method for user user cancontrol the module to scan network transport dataand etc with order User can send all kinds of orders to WLAN module during using the client software the orders are as follow gt Connect to the network 22th page 55 pages in all Serial Configure Output COM g9 Cmd Msg Serial data EE 3 115200 Tnd Join to bss 1 A Info Join successfully 8 ByteSize Ho Parity 1 Stopbit V ACK Control 1 a Laas TCP Please select which group of paramters is to be used D is default l Reset Parameters Transmition repeat per 100 ms Stop Send 1x7 Sel File Send File Clear Status Bss info TX bytes 0 Ssidag3 lin Channel 3 Bssid 08 10 T4 2a 67 4a RY bytes 0 10 Click the Join button 2 Please choose the group network parameter what s needed then click OK 3 Connect successfully gt Disconnect the network 2
29. gt Example 1 Request is to scan the network which the channel is 1 50 60 11 Create the following order according to the parameters the part of blue Return the message of result 40 01 01 OG ia OT B 3 O1 00 Ob O1 60 06 00 2 5 FEE H J J Q J Je dy i ee oa 1TH oO in aJ DO m OO Hd DO J Tum i Rm at i Jor E n or h N gt oF tn Hh a in The explaination content is 50th page 55 pages in all aa N fgssss5s5555555555SSSSE IDX Channel BSSID SSID 1 1 00 1d 60 95 3d e0 asus 2 1 00 1d Of 85 8f 74 wep40bss 3 d 00 0Ob cO 03 06 2a ap wapi 4 1 60 11 22 33 44 02 HED 123 5 6 00 21 27 2a ca d4 megs 6 5 00 1a 70 35 b9 30 stauart wrv_open 7 5 00 1a 70 35 b9 31 Sstauart_wrv_wep __ 8 5 00 1a 70 35 h9 32 stauart wry wepi2z8 9 6 00 1f 33 be 2a c2 NETGEAR 2 4 G 10 6 00 Of 3d 26 9e ff MCGS 11 6 DO 14 d1 c3 5c hd hanjp 12 11 00 1e 58 a3 01 a2 abj 13 11 00 1b 2f 56 df Se 12345 14 11 00 1b 2f 56 0d 50 NETGEAR 15 ii 08 10 74 Oa dtf 46 whz2 gt Example 2 Request is to connect to the target network which the first group of parameters set Create the following order according to the parameters the part of blue Return the message of successful connection aa Oc 00 ic 92 EEUE ENE eerie The explaination content is Connect successfully Channelf 5 BSSID 00 1a 70 35 b9 32 SSIDI stauart_wrv_wep128 4 5 2 The Example of Parameters Setting gt Example
30. he example of sending data sesse ee se ee Rd ee ee Ge Re Re Se ee 52 4 5 4 CRC 8 Algorithm Reference Implementation se see ee ee ee 53 Modification Note of Serial Protocolo eee see se se se ee Se ee Ge ee 54 3th page 55 pages in all 1 1 Overview Main Function Support for UART data serial four baud rate options 19200 38400 57600 115200bps Wireless data rates support the 802 11b Standard the maximum rate is 11Mbps Integrate the functions of 802 11 MAC protocol Softwares M Support for the STA appliances in the Infrastructure Network M Support for the OPEN WEP mode authentication M Support for the wep64 wep128 ccmp wpi data encryption transmission in the shared key mode Support for the automatic networking mode and manual networking mode M In the automatic networking model the module can automatically scan the target network and automatically connect when disconnection E In the manual networking model operation of connect and disconnect is touched off by order this supports a flexible control space Suppport the network data transmission in RAW UDP TCP format Suppport seven groups of the basic parameters set and can connect to seven target networks the most Suppport to Config the parameters through user serial Suppport to upgrate the fireware on line by the internet 4th page 55 pages in all 1 2 Typical Applications 12 1 Wireless POS Machine wireless POS Machine PS N D
31. ink Layer data format of WLAN module as TCP then you can do the data communication with it including sending and receiving text and document gt Upgrate Online 18th page 55 pages in all Work as the online upgrate serverachieved remote firmware upgrade functionality of WLAN module 3 4 Parameter management 3 4 1 Parameter query edit Client software can be used to manage the parameter of WLAN module the following is to modify the encryption method of network parameters as an example to illuminate the method of modifying parameter Wireless Network Param Group Privacy Type open wer ver ccuP BSSID 08 10 T4 2a 67 4a M SSID transfer2 Tata Type TCP Local IP 192 168 1 203 Mask 255 255 255 0 Gateway 192 168 1 1 Server IP 192 168 1 100 Server Port 6000 I Server MAC 00 15 58 e0 Td b9 System FI AutoConnectAP OFF v TCP Server Mode OFF v EE Serial Baudrate 115200 w Transparent Mode OFF v pii York Hode NORMAL 1 Click the parameter configuration button please don t set the parameter during transmission 2 Choose parameter index 19th page 55 pages in all 3 Select the choose box of encryption setting and modify the encryption types A Click the parameter setting button 5 Modification is finished 3 4 2 Parameter Explanation Network parameter includes the parameter needed by connecting to AP and
32. lving the question is as follow a restart the server software b set different service port 31th page 55 pages in all Ouestion why can not the server receive any data a Inspect that encryption type and key setting in network parameters accord with the setting of AP or not b Inspect that IP address of device IP address of server and service port in network parameters set accurately or not c Inspect that the firewall of the computer which the server software runs on turns off or not Question what relation ship between the network card IP address of the computer which the client software runs in and IP address of device in configuration parameters of WLAN module WLAN module has the function of network connection itself and doesn t use the network connection of Windows system in the computer the client software runs in so IP address of the network card has nothing to do with WLAN modul In the demo system the both sides of the communication is IP of the WLAN module device IP of the network card in the server computer Question why does the server software show the non connection status after my client has returned successful connection when UDP format is used UDP protocol is connection oriented connectionless the server software can only getthe address message of data sender after it has received the data in monitor port thus the client must send a little data to the server as communication source beginner at first
33. mode 0 close 1 enable this mode is only effective in TCP data format 4 4 2 Network parameters This module supports most 7 groups of network parameters so the network parameters configuration has 7 group of network parameters and index number is 1 7 Each group of parameters includes gt BSSID Its length is 6 bytes and indicates BSSID of the target network its value is the MAC address of the AP used by the target network gt Channel Its length is 1 byte and indicatesthe channel of the target network its effective range is 1 14 gt SSID Its length is alterable but the most length is 32 bytes and indicates SSID of the target network 47th page 55 pages in all gt PrivacyType Its length is 1 byte and indicates the encryption type of WLAN module its definition is as follow El BM 0 No Encrypted 1 WEP 2 WPI 3 CCMP Reserved gt PrivacyKey Its lengh is 54 bytes it indicates the privacy key the target network used according to the difference of encryption types the definitions of privacy key framework are as follow Mm WEP typedef struct KEY_WEP INT8U KeyLength INT8U KeyIndex INT8U Groups 4 13 KEY_WEP Mm WPI typedef struct KEY_WPI INT8U Unicast 32 INT8U pad 22 KEY_WPI E CCMP typedef struct KEY_CCMP INT8U Unicast 16 INT8U pad 38 KEY_CCMP gt Datatype Its length is 1 byte it indicates the data format of Link Layer its effective value 48th
34. nning network join network leave network parameter configuretion reset gt Receiving control message Analyzing the control message received and displaying the result in the export window gt Parameters configuration Analyzing and modifying the system parameters and the 7 groups of network parameters of WLAN module In the status of networking sending and receiving data including text data and document through wireless network with server software 17th page 55 pages in all gt Serial Data Detection Be able to snatch at the data frames of serial communication and can get the dataframes of serial communication be convenient for users to use UART serial protocol to do the secondary development 3 3 Server Software Server Receive window TCP RX bytes 0 Port 6000 Status Transmit window Remote IP TX bytes 0 Sel File Send File Send TXT not conncet Remote Port not connect Server software runs on the computer with the network connection function When the computer and WLAN module connect to the network built by the same AP then it can do the data transmission testing with the client software gt UDP Testing Build a UDP server set the Link Layer data format of WLAN module as UDP then you can do the data communication with it including sending and receiving text receiving document In this mode the server does not support the function of sending document gt TCP Testing Build a TCP server set the L
35. pect that WLAN module is power on or not Inspect that WLAN module is in transparent transmission mode Questions Why the module may return failed connection The reason of failed connection is manifold possibility First the target network can t be used a Inspect that the power of AP is on and the configuration is accurate or not b Scan network manuslly be sure the target network can be scaned c Inspect that the wireless mode of AP is be set to B or B G mixed mode or not Second parameter configuration about AP in network paramneter is not accurate a Inspect the configuration of WLAN module ensure channel BSSID SSID and encryption setting is the same as the setting of AP Third if Link Layer data format is TCP the incorrectness of parameter configuration about service in network paramnter also cause failed connection a Inspect that MAC address of server IP address of device IP address of server and service port settting is accurate and legitimate or not thereinto MAC address of server indicates the physical address of the network card in the computer which the server software runs in IP address of server indicates the IP address of the computer which the server software runs in Service port indicates the service port set in server software IP address of device indicates the IP address set for WLAN module it must be in a network sect with the IP of server 30th page 55 pages in all Question Why is my secret key
36. ress and port number must accord with the provision of TCP IP protocol Data transmission model is as follow mm l User Interface protocol User Data Gost baa juse Hos kt WLAN Module Il Sea mabe EE sn spac II MAC protocol ll gt Transparent transfer mode In UDP format WLAN module also supportstransparent transfer mode What istransparent transfer it indicates that WLAN module transmite transparently the data received from the serial to the network Data transfer model is as following 12th page 55 pages in all Geel 1 I User Data k1 User Host k7 WLAN Module To get in transparent transfer status must fulfil the following conditions 1 Using Automatic Networking mode 20 Using UDP Link Layer data format 3 WLAN module is in successful networking status What must need to notice WLAN module gets in transparent transfer status then cannot receive user s order from UART serial before using simulation environment to do the testing and demonstration please turn off the WLAN module client software and use general purpose serial tools such as Hyper Terminal serial debugging assistant etc to do the data transmission testting 2 5 3 TCP format TCP is connection oriented Transmission Control Protocol a virtual connection is created between both sides of the communication TCP supports reliable data transmission out of order loss damage and issues such as appear in the process of transmission are
37. s correct DATA A 0 SN n DATA A 0 SN n 1 gt Continuous sending mode It is the sending mode of the data frame which A is set 0 The sender can continuously send the next data after it has sent a frame of data and doesn t need to wait for the acknowledgement of receiver 35th page 55 pages in all sender receiver I DATA A 0 SN n DATA A 0 SN n 1 4 2 3 Serial Configuration In this project the following is the configuration of the UART serial Paud ratel 19200 38400 57600 115200bps Data bit 8bits Parity bit none Stop bit 1bits flow none 4 3 User Serial Control Protocol 4 3 1 Data Format This protocol is used to defined the format of the control data transported throughUART user serial Control data includes the two following types COMMAND and MESSAGE COMMAND the receiver must enforce corresponding operation according to thecontent of the command in this system command can only be emitted by the mainframe 36th page 55 pages in all MESSAGE it indicates the message that the sender needs to send to the receiver and need not the response of the receiver The definition of data format is as follow alterable length Bit7 6 Bit5 0 TYPE Q OOI order mainframe to WLAN module O1 message WLAN module to mainframe 100 reserved 11 reserved SUBTYPEI 000000b scanning 000001b connect to the network 000010b disconnect to the network 000011b set param
38. server this module supports 7 groups of network parameter setting the meaning of each parameter is that gt Parameter Index The index number of the group of network parameter gt Channel SSID Encryption stylef Key These are all the configuration parameters please refer to the setting of AP gt BSSID It indicates the MAC address of the target AP gt The data format of Link Layer It indicates the data format used by the transmission between WLAN module and server the setting here must be the same with the setting of the server which connects to Note the server software in this testing system can only support UDP and TCP these two data formats gt Device s IP address It indicates the IP address of WLAN module and it s arbitrarily designated by users but it must be sure that the setting IP address is the legitimate IP address of the tsrget AP and dosen t be used What specially needs to explan the address have nothing to do with the network card s IP address of the tester 1 which computer the client software run on gt Subnet Mask It indicates the subnet mask of the network WLAN module exists in gt Gateway IP Address 20th page 55 pages in all It indicates the gateway IP address of the network WLAN module exists in gt Server IP Address It indicates the IP address of the network card of tester 2 gt Service Port It indicates the monitor port of server its setting must be the same with the server S
39. so support the document transfer between each other showed in the following drawing is the procees that the client sends document to the server 28th page 55 pages in all Serial Configure Output GE me COM1 115200 File Sending File Send completely total 805162 bytes 8 ByteSize Ho Parity 1 Sterbit V ACK Clear Control Join Leave TCP Reset J Parameters Transmition Input repeat per E beijing 4T79 txt Stop Send TXT C Sel File 7 Send File gt gt Status Bss info TX bytes 813400 Ssid ag3 lin Channel 3 Bssid 08 10 74 2a 67 4a RY bytes 0 OJ WLANETEST Server 1 32EN Size 805162 bytes Time 2 minutes 41 seconds Rate 4997 byte s File Receive completel Status Transmit window Remote IP TX bytes 0 Sel File Send File 192 168 1 203 Remote Port 10036 What needs to regard when WLAN module uses UDP data format it only 29th page 55 pages in all Supports that document is sent by the client to the serverand UDP is uncertaint document transfer may be disconnected by network matter to ensure the transmission reliably please use TCP format 3 10 The Answers of Familiar Questions Questions Why the Notice Module disconnected message appeared at thetime the client sends the control order Inspect that the serial setting of the client software is accurate or not Ins
40. ystem parameter embodies one group and it s used to control the work mode of WLAN module the mode includes gt Networking mode It indicates that users can choose auto and manual this two type in the parameters of networking mode gt Transparent Transfer Mode It indicates transfer format of serial data and it s able to be chose enableo or close What is needed to notice transparent transfer function can only be effective when networking mode is automatic and data format of server is UDP Except this instance this parameter can be ignored gt Serial paud Rate It indicates communication speed of serial its configuration is the serial transfer speed of the hardware of WLAN module the serial speed setting of the client software can refer to the serial setting column of the main window of the software The speed between both sides must be the same otherwise the communication between the client software and module can t go along 3 5 Automatic networking In automatic mode all process of networking is finished automatically by WLAN module without user s control so that supports a most ordinary method User only needs to set at least one group of network parameter once then WLAN module will scan network automatically after power on reset if module has scaned the target netwprk then connects automatically and sends the message of connection has 21th page 55 pages in all successed after successful connection that is as follow Serial Con
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