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3.4. Power Saving
3.4.1. Airplane Mode
When the module enters airplane mode, the RF function does not work, and all AT commands correlative
with RF function will be inaccessible. This mode can be set via the following ways.
Hardware:
W_DISABLE#* is pulled up by default. Driving it low will let the module enter airplane mode.
Software:
AT+CFUN=<fun> provides choice of the functionality level, through setting <fun> into 0, 1 or 4.
AT+CFUN=0: Minimum functionality mode. Both (U)SIM and RF functions are disabled.
AT+CFUN=1: Full functionality mode (by default).
AT+CFUN=4: Airplane mode. RF function is disabled.
NOTES
1.
Airplane mode control via W_DISABLE#* is disabled in firmware by default. It can be enabled by
AT+QCFG="airplanecontrol". For details of the command, see document [3].
2.
The execution of AT+CFUN command will not affect GNSS function.
3.4.2. Power Saving Mode (PSM)*
BG772A-GL module minimizes its power consumption through entering PSM. The mode is similar to
power-off, but the module remains registered on the network and there is no need to re-attach or
re-establish PDN connections. So BG772A-GL in PSM cannot immediately respond users' requests.
When the module wants to use the PSM, it shall request an Active Time value during every Attach and
TAU procedures. If the network supports PSM and accepts that the module uses PSM, the network
confirms usage of PSM by allocating an Active Time value to the module. If the module wants to change
the Active Time value, e.g. when the conditions are changed in the module, the module requests the
value it wants in the TAU procedure.
If PSM is supported by the network, then it can be enabled via AT+CPSMS*.
Either of the following methods will wake up the module from PSM:
PON_TRIG active high for minimum assertion time 100 μs will wake up the module from PSM.
(recommended)
When RTC expiration will wake up the module.
BG772A-GL_Hardware_Design
LPWA Module Series
BG772A-GL Hardware Design
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