Power Saving; Sleep Mode; Uart Application - Quectel EC25-V User Manual

In this mode, the current consumption of the module will be reduced to the minimal level.

Sleep Mode

During this mode, the module can still receive paging message, SMS, voice call and
TCP/UDP data from the network normally.
In this mode, the power management unit shuts down the power supply. Software is not
Power Down
active. The serial interface is not accessible. Operating voltage (connected to VBAT_RF
Mode
and VBAT_BB) remains applied.

3.5. Power Saving

3.5.1. Sleep Mode
EC25 is able to reduce its current consumption to a minimum value during the sleep mode. The following
section describes EC25's power saving procedure.

3.5.1.1. UART Application

If host communicates with module via UART interface, the following preconditions can let the module
enter into the sleep mode.
Execute AT command AT+QSCLK=1 to enable the sleep mode.

Drive DTR to high level.

The following figure shows the connection between the module and the host.
Driving host DTR to low level will wake up the module.

When EC25 has URC to report, RI signal will wake up the host. Refer to Chapter 3.16 for details

about RI behavior.
AP_READY will detect the sleep state of host (can be configured to high level or low level detection).

EC25-V_User_Manual
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Module
RXD
TXD
RI
DTR
AP_READY
GND
Figure 3: UART Sleep Application
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LTE Module Series
EC25-V User Manual
Host
TXD
RXD
EINT
GPIO
GPIO
GND
22 /