Turn Off Module; Turn Off Module Using The Pwrkey Pin; Turn Off Module Using At Command - Quectel EG91 Series Hardware Design

NOTES
1. Please make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is
no less than 30ms.
2. PWRKEY can be pulled down directly to GND with a recommended 10K resistor if module needs to
be powered on automatically and shutdown is not needed.

3.7.2. Turn off Module

Either of the following methodscan be used to turn off the module:
 Normal power-offprocedure: Turn off the module using the PWRKEY pin.
 Normal power-off procedure: Turn off the module using AT+QPOWDcommand.

3.7.2.1. Turn off Module Using the PWRKEY Pin

Driving the PWRKEY pin to a low level voltage for at least 650ms, the module will execute power-off
procedure after the PWRKEY is released. The power-off scenario is illustrated inthe following figure.

3.7.2.2. Turn off Module Using AT Command

It is also a safe way to use AT+QPOWDcommandto turn off the module, which is similar to turning off the
module via PWRKEY pin.
Please refer todocument [2] for details about the AT+QPOWDcommand.
EG91_Hardware_Design
Figure 13: Power-off Scenario
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LTE Module Series
EG91 Hardware Design