Specifications

WM_PRJ_Q2400_PTS_001 - 003
6th November 2002
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5.3 Firmware upgrade
The WISMO Quik Q2403 Series firmware is stored in flash memory and it can
easily be upgraded.
In order to follow the regular evolutions of the GPRS standard and to offer state
of the art software, Wavecom recommends that the application designed
around a WISMO (or WISMO based product) allows easy firmware upgrades
on the module via the standard Xmodem protocol. Therefore, the application
shall either allow a direct access to the WISMO serial link through an external
connector or implement any mechanism allowing the WISMO firmware to be
downloaded via Xmodem.
Two upgrade procedures are available:
5.3.1 Nominal upgrade procedure
The firmware file can be downloaded into the modem using the Xmodem
protocol.
To enter this mode, the AT+WDWL command (see description in the AT
command manual) has to be sent.
The necessary serial signals to proceed with the Xmodem downloading are:
Rx, Tx, RTS, CTS and GND.
5.3.2 Backup procedure
In case the nominal upgrade mode is not possible (due to critical corruption on
the flash memory), a backup procedure is also available. It requires a
WAVECOM specific software to download the firmware file into the modem.
This tool has to run on a PC connected to the serial bus of the modem.
The necessary signals to proceed with the downloading are: Rx, Tx, RTS, CTS
and GND.
Prior to running the WAVECOM downloader, the modem has to be set in
download mode.
For this, the BOOT signal has to be set to low while powering ON (or reseting)
the modem.
Note:
To reduce the time of the download, it’s possible to change the speed of
the serial link at 115200 bits/s. for that, you have to execute the AT command
below:
1) AT+IPR=115200
2) AT+WDWL
3) file transfer
4) AT+CFUN=1 (reset of the module)
Make attention that after the last command, the serial link will be by default at
9600 bits/s.