Turn Off Procedure - Quectel EC25 Command Manual

LTE Module Series
EC25&EC21 AT Commands Manual

1.6. Turn off Procedure

It is recommended to execute AT+QPOWD command to turn off the module, as it is the safest and best
way. This procedure is realized by letting the module log off from the network and allowing the software to
enter into a secure and safe data state before disconnecting the power supply.
After sending AT+QPOWD, do not enter any other AT commands. The module outputs message,
POWERED DOWN and sets the STATUS pin as low to enter into the shutdown state. In order to avoid
data loss, it is suggested to wait for 1s to switch off the VBAT after the STATUS pin is set as low and the
URC POWERED DOWN is outputted. If POWERED DOWN has not been received after 65s, the VBAT
shall be switched off compulsorily.
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