Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 52)

Open AT ® Commands
Wavecom Open AT ® Control Command +WOPEN
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WM_DEV_OAT_UGD_049 - 001 VOLUME 1 August 23, 2007
Caution:
With = 6, any A&D size change will lead to the area format process (this
process will take some seconds on start-up, before the "+WIND: 3" indication display
(up to 1.5 second per 64 Kbytes flash sector size can be considered as a maximum);
all A&D cells data will be erased.
USB restrictions:
Starting or stopping an Open AT ® application resets the Wavecom Wireless CPU ® .
When these AT commands (AT+WOPEN=1 or AT+WOPEN=0) are sent to the
Wavecom Wireless CPU ® by using the USB serial port, the user must:
1. Close the USB serial port as soon as the command is sent to the Wavecom
Wireless CPU
® . This means that the OK response cannot be received by the user
application.
2. Wait sufficient time to allow the Wavecom Wireless CPU ® to reset. Usually, the
user must wait 1 second before reopening the USB serial port.