Figure 3: DRX Run Time and Current Consumption in Sleep Mode
The following section describes power saving procedure of module.
If the host supports USB suspend/resume and remote wakeup function, the following two preconditions
must be met to enable the module enter sleep mode.
⚫ Execute AT+QSCLK=1 command to enable the sleep mode.
⚫ The host’s USB bus, which is connected with the module’s USB interface, has entered into suspend
state.
The following figure shows the connection between the module and the host.
Figure 4: Sleep Mode Application with USB Remote Wakeup
⚫ Sending data to module through USB will wake up the module.
⚫ When module has a URC to report, the module will send remote wake-up signals via USB bus to
wake up the host.
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