When the battery is present (Option S0531A), a mechanism allows to stop completely the
application if the external power supply is unplugged, and also to prepare the modem for
storage or transport, in order to limit high discharges of the battery.
If the device is not used, it has to be deactivated by sending the following command:
If the modem has an application developed with EGM
Disconnect the external power supply of the modem.
And send the command AT+GPIOSET=35,0
If the modem does not contain any embedded application, via the Boot-Loader menu
Bootloader V4.09 GL54 UA Gener Ublox (HWF1 rev D/E)
GSM voltage = 4330 mV
1 - Update application
2 - Erase objects
M - GSM direct access (external supply required)
A - Advanced
P - Power off
E - Exit
Disconnect the external power supply of the modem.
And Enter "P"
Important note: The switching of the battery and its auto-maintain will be automatically
reactivated once the modem will be plugged again to its external power
supply.