AT+i Programmer's Manual - SE Spezial-Electronic AG

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18 DHCP Server DHCP Server iChip‘s DHCP server allows it to manage a network segment when no DHCP server is available. The DHCP server can handle up to 255 IP addresses concurrently. Two parameters govern DHCP server functionality: DPSZ: The DHCP pool size parameter determines the range of IP addresses that iChip allocates for its clients. DSLT: The DHCP server lease time determines the lease time that iChip grants when assigning IP addresses. The DHCP server is activated under the following conditions: An IP address is defined by the DIP parameter. The DPSZ parameter is set to a value greater than 0. When activated, iChip‘s DHCP server assigns IP addresses starting from DIP+1 up to DIP+DPSZ. In addition, the DHCP server offers the IP address stored in the IPG parameter as a gateway to clients, and the mask address stored in its SNET parameter as a Sub-Net. The assignment policy of iChip is as follows: 1. iChip attempts to assign the same IP for the same MAC address. 2. iChip starts re-using addresses only after using all the addresses in the pool. 3. iChip attempts to re-use the oldest expired address first. 4. iChip attempts to ping the address it is about to assign in order to avoid assigning an address already used. 5. iChip offers its SNET parameter as a Sub-Net. If SNET is 0.0.0.0, iChip calculates a new one according to address class. 6. iChip offers its IPG parameter as a gateway. If IPG is 0.0.0.0, iChip offers its IP address as a gateway. 7. iChip offers its DNS parameter to the client, provided it is not 0.0.0.0. <strong>AT+i</strong> Programmer‘s <strong>Manual</strong> Version 8.21 18-1
19 Ad-Hoc Networks Ad-Hoc Networks An ad-hoc network is a Wireless Local Area Network (WLAN) in which some of the stations are part of the network only for the duration of a communications session or, in the case of mobile or portable devices, while in some close proximity to the rest of the network. Ad-hoc networks do not require an Access Point (AP) to enable communication among stations. Each station can create a new ad-hoc network or join an existing one. Networks can freely merge into a single network or split into smaller ones, thus adapting to changing conditions such as topology, signal strength, and proximity to nearby ad-hoc networks. Connect One‘s implementation of an ad-hoc network requires that each station be equipped with the Marvell 88W8686 chipset for IEEE 802.11b/g WiFi connectivity. 19.1 Configuration Configuring the iChip to operate as a station in an ad-hoc network requires setting the following parameters: WLSI must be set to either ‗!‘ or ‗!‘. When it is set to ‗!‘, iChip continuously searches for existing ad-hoc networks in its vicinity and joins the one having the strongest signal. When it is set to ‗!‘, iChip searches for an ad-hoc network having the specified Service Set IDentifier (SSID). If it finds one it joins it, otherwise it creates a new network with this SSID. WLCH must be set to a default value. This value indicates the communication channel (1-13) to be used for beacon transmission in the ad-hoc network. When iChip joins an already existing network, it adopts the channel used by that network. If WLSI=! and WLCH=0, iChip will only join an already existing network. 19.2 iChip Behavior in Ad-Hoc Mode 19.2.1 Automatic Scanning for Existing Ad-Hoc Networks After power-up, iChip automatically attempts to locate and connect to an ad-hoc network, unless the WLSI parameter (SSID) is set to (*). If the WLSI parameter contains an SSID string preceded by (!) or set to (!), iChip scans for ad-hoc networks only. 19.2.2 Creating a New Ad-Hoc Network If iChip does not detect any ad-hoc networks in its vicinity, and the WLSI parameter contains an SSID, iChip creates a new ad-hoc network with its own BSSID.
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Pub. No. 20-5000-08_21, January 200
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Revision History 20-5000-08_21 Revi
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Contents 10.1 +IWWW — ACTIVATE EM
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Contents 25.3 HEADER PARAMETER NAME
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Contents 33.4.5 +iRDL — Number of
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Contents 33.17.2 +iDSLT — DHCP Se
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Tables Tables Table 2-1 AT+i Comman
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AT+i Command Set If a syntax error
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2 General Format AT+i[[ | #UFn]…]
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General Format Command Function Par
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General Format Command Function Par
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AT+i Result Code Summary 85 RESERVE
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4 Report Status 4.1 +iRPi — Repor
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Report Option Format 10 I/(, , , )
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5 Connection 5.1 +iBDRA — Forces
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5.3 +iTUP — Triggered Internet Se
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5.4 +iDOWN — Terminate Internet S
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6 E-mail Send Commands E-mail Send
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Notes: E-mail Send Commands I/OK If
Page 39 and 40: 7 E-Mail Retrieve 7.1 +iRML — Ret
Page 41 and 42: 7.3 +iRMM — Retrieve Mail Message
Page 43 and 44: E-Mail Receive (RMM) Flow Diagram I
Page 45 and 46: -or- specified. HTTP Client Interfa
Page 47 and 48: 9 SerialNET Mode Initiation 9.1 +iS
Page 49 and 50: 10 Web Server Interface 10.1 +iWWW
Page 51 and 52: 11 File Transfer Protocol (FTP) 11.
Page 53 and 54: 11.3 +iFDNL — FTP Directory Names
Page 55 and 56: 11.5 +iFCWD — FTP Change Working
Page 57 and 58: 11.7 +iFRCV — FTP Receive File Sy
Page 59 and 60: 11.9 +iFAPN — FTP Open File for A
Page 61 and 62: 11.11 +iFCLF — FTP Close File Syn
Page 63 and 64: 11.13 +iFCLS — FTP Close Session
Page 65 and 66: 12.2 +iTRCV — Telnet Receive Data
Page 67 and 68: 12.4 +iTBSN[%] — Telnet Send A By
Page 69 and 70: 12.6 +iTCLS — Telnet Close Sessio
Page 71 and 72: 13.2 +iSUDP — Open A Connectionle
Page 73 and 74: Direct Socket Interface 13.4 +iLSST
Page 75 and 76: 13.6 +iSCS — Get A Socket Connect
Page 77 and 78: Result Code: Direct Socket Interfac
Page 79 and 80: Direct Socket Interface I/ERROR If
Page 81 and 82: 13.10 +iSDMP — Dump Socket Buffer
Page 83 and 84: 13.12 +iSCLS — Close Socket Synta
Page 85 and 86: 15 Wireless LAN Mode Wireless LAN M
Page 87 and 88: 16 IP Registration IP Registration
Page 89: 17 DHCP Client DHCP Client A DHCP c
Page 93 and 94: 20 Secure Socket Protocol Secure So
Page 95 and 96: Secure Socket Protocol When the AT+
Page 97 and 98: 20.6 +i[@]FOPS — Secure FTP Open
Page 99 and 100: 22 MIME Encapsulated E-Mail Message
Page 101 and 102: 22.3 MIME-Encapsulated E-Mail Messa
Page 103 and 104: The control characters are defined
Page 105 and 106: 23.3 Software Flow Control During A
Page 107 and 108: 23.5 Host iChip Hardware Flow Cont
Page 109 and 110: Remote Firmware Update 2. If the do
Page 111 and 112: 25 iChip Parameter Update 25.1 Intr
Page 113 and 114: 25.4 Uploading A Parameters Update
Page 115 and 116: 26.3 Web Server Modes Two web serve
Page 117 and 118: 26.7 Host Interaction Mode iChip Em
Page 119 and 120: ~headline~ iChip Embedded Web Ser
Page 121 and 122: iChip Embedded Web Server Tags. Thi
Page 123 and 124: 27.3 RAS Theory of Operation iChip
Page 125 and 126: 28 SerialNET Theory of Operation 28
Page 127 and 128: SerialNET Theory of Operation bytes
Page 129 and 130: SerialNET Theory of Operation If th
Page 131 and 132: Accumulate Quiet Time 29.5 FTP Rece
Page 133 and 134: Secure Socket Protocol Theory of Op
Page 135 and 136: [ CA_default_policy ] commonName =
Page 137 and 138: Secure Socket Protocol Theory of Op
Page 139 and 140: Remote AT+i Service iChip LAN will
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Nonvolatile Parameter Database Para
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33.3 Operational Parameters 33.3.1
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33.3.3 +iMIS — Modem Initializati
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2. AT+iMIS=‖ 3. AT+iBDRF=3 4. AT+
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33.3.6 +iTTO — TCP Timeout Syntax
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33.3.8 +iMPS — Max PPP Packet Siz
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Nonvolatile Parameter Database 33.3
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33.3.14 +iFLW — Set Flow Control
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33.3.16 +iPSE — Set Power Save Mo
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33.3.18 +iDF — IP Protocol ‘Don
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33.4 ISP Connection Parameters 33.4
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33.4.3 +iUSRN — Define Connection
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33.4.5 +iRDL — Number of Times to
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33.5 Server Profile Parameters 33.5
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33.5.3 +iSMTP — Define SMTP Serve
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33.5.7 +iPOP3 — Define POP3 Serve
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33.7 Email Format Parameters Nonvol
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33.7.4 +iDELF — Email Delete Filt
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33.7.6 +iTOA — Define Primary Add
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33.7.8 +iREA — Return Email Addre
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33.7.10 +iCCn — Define Alternate
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33.7.12 +iMST — Media Subtype Str
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33.8 HTTP Parameters Nonvolatile Pa
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33.9 RAS Server Parameters Nonvolat
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33.9.3 +iRAP — Password for RAS A
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33.10.2 +iDIP — iChip Default IP
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33.10.4 +iIPG — IP Address of the
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33.11 Wireless LAN Parameters 33.11
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33.11.3 +iWLWM — Wireless LAN WEP
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33.11.5 +iWLKn — Wireless LAN WEP
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33.11.7 +iWLPP — Personal Shared
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33.12 IP Registration Parameters No
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33.16 Secure Socket Protocol Parame
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33.16.3 +iCERT — Define SSL3/TLS1
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33.17 DHCP Server Parameters Nonvol
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34 Appendix A 34.1 MIME content typ
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Type Subtype image jpeg gif ief g3f
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MT=0 MST=‖text-plain‖ # CONNECT
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37 Index +i!RP11 - Ad-Hoc Network R
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Header Parameter Names and Values .
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