4 Circuit Design
Copyright © Fibocom Wireless Inc.
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4.3.2.3
USB Application (USB Suspend Supported)
If the host supports USB Suspend/Resume, set the USB sleep mode in the Linux system.
Sleep mode:
The USB port of the module sets the level and control in the USB device to auto in the
Linux system to suspend the USB device of the module. The module and the host are
static for about 2s. Then, the module automatically enters the suspend state.
Wake mode:
The module can wake up through any USB operation.
4.3.2.4
Disabling USB
If there is no USB connection between the module and the host, you can disable the USB
to enter the power saving mode. You can disable the USB inside the module to save
power. For details, see the relevant software documents.
The USB ports of the module cannot contain adb ports, for example,
+GTUSBMODE=17.
Power consumption of the module in idle state can be implement by the
following commands and steps:
1.
AT+DISK=0,0,0
2.
AT+GTUSBDETECTEN=1
3.
AT+SYSCMD=echo off > /sys/power/autosleep
4.
Remove the USB cable.
