Sunsea AIoT SimCom SIM7090G User Manual page 57

Extended Mode DRX
(e-DRX)
5.3.2 Flight Mode
When the module enters into flight mode, the RF function does not work, and all AT commands correlative
with RF function will be inaccessible. This mode can be set via the following ways.
Hardware: W_DISABLE#* is pulled up by default. Driving it to low level will let the module enter

into flight mode.
Software: AT+CFUN=4 can be used to set the module to flight mode without removing the power

supply.
5.3.3 Sleep mode
Module can enter into sleep mode for reducing its power consumption in idle module. In sleep mode, the
current consumption of module will be reduced to very small level, and module can still receive paging
message and SMS.
Several hardware and software conditions must be satisfied together in order to let SIM7090G enter sleep
mode:
USB condition: Connected USB can't enter into sleep mode. So if module wants to enter into sleep

mode, it must disconnect the power supply for USB_VBUS first.
Software condition: If module wants to enter into sleep mode, AT comment "AT+CSCLK=1" must

be set to close some clock in the module. If the value "AT+CSCLK" is "0", module will never enter
into sleep mode.
UART condition: If module wants to enter into sleep mode, AT comment "AT+CSCLK=1" must be

set to close some clock in the module. If the value "AT+CSCLK" is "0", module will never enter into
sleep mode.
If it meets all the conditions at the same time, module will enter into sleep mode. In sleep mode, the UART
is unavailable. If the host need to communicate with module, it need to pull down DTR can wake up module.
5.3.4 Minimum functionality mode and Flight mode
There are three functionality modes, which could be set by AT command "AT+CFUN=<fun>". The command
provides the choice of the functionality levels <fun>=0, 1, 4.
AT+CFUN=0: Minimum functionality

AT+CFUN=1: Full functionality (Default)

AT+CFUN=4: Flight mode

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In idle or sleep mode, module and the network may negotiate over
non-access stratum signaling the use of extended mode DRX for
reducing power consumption.
SIM7090G User Manual V1.01
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