We currently using firmware R188.8.131.52212170952.Q2687G
We update the time on all our devices on a daily basis for RTC to be always in sync with our server.
The server Date and Time was updated around 45 days after that server Date & Time is not updated.
I currently have issues with 80 units out of 800 devices deployed in the field.
This device was sent back to our office,We configure the Date and Time (AT+CCLK=“15/04/25,08:29:40”) command and verify the Date and Time by using (“AT+CCLK?”) command.
Received date and Time is +CCLK: “15/04/25,07:40:10”.
Hence the RTC Date and Time not updated.
We reset the RTC backup battery power after that Date and Time was successfully updated.
Kindly give your feed back for over come this issue.