User's Manual

UE910 3G HARDWARE USER GUIDE 1vv0301171 Rev.3 • 2015-04-17 31 of 78
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A flow chart showing the AT commands managing procedure is displayed
below:
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the UE910 when the
module is powered off or during an ON/OFF transition.
“Start AT CMD”
START
Delay = 300 msec
Enter AT <CR>
GO TO
“HW Shutdown
Unconditional”
AT answer in
1 sec ?
GO TO
“Modem ON Proc.”
“Start AT CMD”
END
Y
N