Power Saving; Sleep Mode; Uart Application - Quectel LTE-A Series Hardware Design

3.4. Power Saving

3.4.1. Sleep Mode

DRX of EG18 is able to reduce the current consumption to a minimum value during the sleep mode, and
DRX cycle index values are broadcasted by the wireless network. The figure below shows the relationship
between the DRX run time and the current consumption in sleep mode. The longer the DRX cycle is, the
lower the current consumption will be.
DRX OFF
Figure 3: DRX Run Time and Current Consumption in Sleep Mode
The following sections describes power saving procedure of EG18.

3.4.1.1. UART Application

If the host communicates with the module via UART interfaces, both of the following preconditions should
be met to make the module enter into sleep mode.

Keep DTR at high level (pulled up by default).

Execute AT+QSCLK=1 command to enable sleep mode.
EG18_Hardware_Design
ON OFF ON OFF ON OFF
LTE-A Module Series
EG18 Hardware Design
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