LTE Module Series
EG25-G Hardware Design
EG25-G_Hardware_Design 30 / 100
3.5.
Power Saving
3.5.1.
Sleep Mode
EG25-G is able to reduce its current consumption to a minimum value during the sleep mode. The
following section describes power saving procedures of EG25-G module.
3.5.1.1. UART Application
If the host communicates with module via UART interface, the following preconditions can let the module
enter into sleep mode.
Execute
AT+QSCLK=1
command to enable sleep mode.
Drive DTR to high level.
The following figure shows the connection between the module and the host.
RXD
TXD
RI
DTR
AP_READY
TXD
RXD
EINT
GPIO
GPIO
Module
Host
GND
GND
Figure 3: Sleep Mode Application via UART
Driving the host DTR to low level will wake up the module.
When EG25-G has a URC to report, RI signal will wake up the host. Please refer to
Chapter 3.19
for
details about RI behaviors.
AP_READY will detect the sleep state of the host (can be configured to high level or low level
detection). Please refer to
AT+QCFG="apready"*
command for details.
“*” means
under development.
NOTE
