Multitech MMCModem GPRS (MTMMC-G) Manual de usuario descargar pdf (Pagina 23)

Chapter 4 – Data Exchange for Protocol Services

Multi-Tech Systems, Inc. IP Connectivity AT Commands for GPRS-F4 Wireless Modems (PN S000437C) 23

Chapter 4 – Data Exchange for Protocol

Services

The section deals with the data exchange for the services over TCP/IP. All the commands required for the

data exchange through different services are mentioned in succeeding pages.

File Exchange +WIPFILE

Description: The +WIPFILE command define the “file system” services that allow sending a block

of data through standard TCP/IP protocols. This command is for file

transfer/reception.

Notes:

• The SIM card must be inserted in order to use this command

• The PIN 1/ CHV 1 code must be entered in order to use this command.

• The PIN 2/CHV 2 code does not have to be entered in order to use this

command.

• The +WIND general indication command value from which +WIPCREATE

is allowed is 4. This value (4) indicates that the product is ready to process

AT commands (except phonebooks, AOC, SMS), but is still in emergency

mode. See Appendix A – GSM/GPRS +WIND AT Command.

Syntax: AT+WIPFILE=<protocol>,<index>,<mode>,<filename>

Read command: AT+WIPFILE? Displays the current values.

Test Command: AT+WIPFILE=? Displays available values.

Parameters/Defined Values:

<protocol>: protocol type

4 FTP

<idx>: channel identifier

<mode>: file transfer mode

1 File retrieval: Wireless CPU

switches to data mode and prints

the content of the file on UART. The end of the file is marked by

[ETX] character. After this has been sent, the UART switches

back to AT mode.

2 File transfer: This command switches the UART in data mode

and accepts a stream of data terminated by [ETX] character.

<filename>: specifies the name of the file to send or retrieve.

The maximum file length is limited to 128 characters. The actual

filename, including path name has to be used.

Parameter Storage: None

Possible Errors:

“+CMEE” AT error code Description

800 invalid option

803 operation not allowed in the current WIP stack state

830 bad index

831 bad state

834 not implemented

836 memory allocation error

837 bad protocol

839 error during channel creation

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