Sunsea AIoT SimCom SIM7090G User Manual page 26

3.2.2 Turn off Module
The following methods can be used to power off SIM7090G.
Method 1: Power off SIM7090G by pulling the PWRKEY pin to ground.
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Method 2: Power off SIM7090G by AT command "AT+CPOWD=1".
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Method 3: over-voltage or under-voltage automatic power off. The function can be enabled by AT
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command "AT+CBATCHK=1". Default is disabled.
NOTE
For details about "AT+CPOWD" and "AT+CBATCHK", please refer to Document [1].
It is not recommended to turn off the module by disconnecting VBAT power. Otherwise, there is a risk of
damage to the module file system.
These procedures will make modules disconnect from the network and allow the software to enter a safe
state, and save data before module be powered off completely.
The power off scenario by pulling down the PWRKEY pin is illustrated in the following figure.
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Figure 8: Power off timing sequence
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