Hardware Guide

4 Circuit Design
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Sleep mode:
Send AT+GTLPMMODE=1,X to set the effective level of the WAKEUP_IN signal that sets the
module into sleep mode. Command is effective after resetting module.
(When X=0, if WAKEUP_IN pin is at high level, the module will enter sleep mode;
When X=1, if WAKEUP_IN pin is at low level, the module will enter sleep mode)
AT+CSCLK=1 Enable sleep mode function.
AT+GTUSBSLEEPEN=1,0 Set USB sleep mode.
Unplug the USB cable and turn off the USB Hub master controller. The module will enter
sleep mode.
Wake mode:
Insert the USB. Turn on the USB master controller or pull down USB_VBUS. The module
will wake up.
4.3.2.2 USB Application (USB Suspend Not Supported and VBUS Not
Supported)
If the host does not support the USB Suspend function or VBUS detection, the module
can enter the sleep mode by disconnecting USB.
Sleep mode:
Unplug the USB cable or turn off the USB Hub master controller. The module will enter
sleep mode.
Wake mode:
Insert the USB or turn on the USB master controller. The module will wake up.