LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 26 / 76
Hardware:
W_DISABLE# is pulled up by default. Driving it to low level will let the module enter into 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.
1. Airplane mode control via W_DISABLE# is disabled in firmware by default. It can be enabled by
AT+QCFG="airplanecontrol"
command which is still under development. Details about the
command will be provided in
document [2]
. W_DISABLE# function is also under development.
2. The execution of
AT+CFUN
command will not affect GNSS function.
3.4.2. Power Saving Mode (PSM)
BG77 module can enter into PSM for reducing its power consumption. 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 BG77 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 consequently
requests the value it wants in the TAU procedure.
If PSM is supported by the network, then it can be enabled via
AT+CPSMS
command.
Either of the following methods will wake up the module from PSM:
A rising edge on PON_TRIG will wake up the module from PSM. (Recommended)
Drive PWRKEY pin low will wake up the module.
When the T3412_Ext timer expires, the module will be woken up automatically.
Please refer to
document [2]
for details about
AT+CPSMS
command.
NOTES
NOTES
