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

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24 Remote Firmware Update 24.1 Introduction Remote Firmware Update iChip accepts remote firmware updates from an HTTP or FTP server. The firmware update is stored as an .imz file on the host server and downloaded by iChip acting as a client. iChip replaces its existing firmware with the new one through a special application that is part of the .imz file. This method is especially convenient when managing firmware updates in a globally distributed install base of internet-enabled devices. 24.2 Updating Firmware from a Remote Server This method involves placing the firmware update .imz file on an HTTP or FTP server. iChip has the provisions to use its respective HTTP or FTP client to download the firmware update file and perform the update process. Before the actual remote firmware update command can be issued, the following parameters must be set: USRV — Defines the protocol to be used (HTTP or FTP), and the name of the host on which one or more .imz files are stored. UUSR — Defines FTP user name (FTP only). UPWD — Defines FTP user password (FTP only). UEN — This flag indicates whether iChip updates to a firmware version that is newer than the currently installed one only, or to any firmware version it finds. In addition, an appropriate .imz firmware update file must be placed on the remote server at the location specified by the USRV parameter. Once the above parameters are defined, the firmware update process can be initiated by sending the following command to iChip: <strong>AT+i</strong>RFU iChip returns I/OK to acknowledge receipt of the command. As the update process may take up to 4 minutes to complete, iChip issues an I/UPDATE message to notify the host that it is in the process of updating its firmware. The host must allow for an extended delay period until iChip completes the process. Once completed, iChip re-boots the new firmware and issues an I/DONE message when in dialup mode, or an I/ONLINE in LAN mode. Several safeguards have been instated to ensure a successful firmware update. The firmware update file is structured by Connect One in a specific format, which allows iChip to authenticate its origin as a legal firmware image. iChip also verifies that the firmware update is the correct version for its hardware environment. iChip rejects an update file if it contains an image that is identical to the one already installed. The remote firmware update procedure is detailed below: 1. iChip downloads the new firmware imz file.
Remote Firmware Update 2. If the download fails, iChip returns an error message and continues to work as before. 3. If during the download iChip is going over a reset cycle (SW or HW), iChip re-boots and executes the old firmware. 4. If the download is successful, iChip authenticates the firmware image file. 5. iChip replaces the old image with the new image. 6. If the replacement process fails, for example due to power failure, iChip re-boots from boot loader in the flash memory and re-tries the replacement process until successful. 7. If the replacement process is successful, iChip re-boots and executes the new firmware.
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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
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7 E-Mail Retrieve 7.1 +iRML — Ret
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7.3 +iRMM — Retrieve Mail Message
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E-Mail Receive (RMM) Flow Diagram I
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-or- specified. HTTP Client Interfa
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9 SerialNET Mode Initiation 9.1 +iS
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10 Web Server Interface 10.1 +iWWW
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11 File Transfer Protocol (FTP) 11.
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11.3 +iFDNL — FTP Directory Names
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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 and 90: 17 DHCP Client DHCP Client A DHCP c
Page 91 and 92: 19 Ad-Hoc Networks Ad-Hoc Networks
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: 23.5 Host iChip Hardware Flow Cont
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
Page 141 and 142: Nonvolatile Parameter Database Para
Page 147 and 148: 33.3 Operational Parameters 33.3.1
Page 149 and 150: 33.3.3 +iMIS — Modem Initializati
Page 151 and 152: 2. AT+iMIS=‖ 3. AT+iBDRF=3 4. AT+
Page 153 and 154: 33.3.6 +iTTO — TCP Timeout Syntax
Page 155 and 156: 33.3.8 +iMPS — Max PPP Packet Siz
Page 157 and 158: Nonvolatile Parameter Database 33.3
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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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