Turn Off; Turn Off The Module With At Command And Pon_Trig - Quectel BG950A-GL Manual

3.9. Turn Off

After the module is turned off or enters PSM, do not pull up any I/O pin of the module. Otherwise, the
module will have additional power consumption and may have damaged pins. Either of the following
methods can be used to turn off the module normally:
Turn off the module through PWRKEY and PON_TRIG.

Turn off the module through AT+QPOWD and PON_TRIG.

3.9.1. Turn off with PWRKEY and PON_TRIG
When the module is powered on, driving PWRKEY low for 650–1500 ms and then releasing it, and pull
down the PON_TRIG with 200 ms, after which the module will execute a power-down procedure.
The power-down timing is illustrated in the following figure.
Figure 10: Power-down Timing (PWRKEY & PON_TRIG）

3.9.2. Turn off the Module with AT Command and PON_TRIG

It is also a safe way to use AT+QPOWD to turn off the module, which is similar to turning off the module
with PWRKEY. After the AT+QPOWD is sent, pull down PON_TRIG within 200 ms, and the module will
execute the power-down procedure.
See document [3] for details about AT+QPOWD.
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