Product Info

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design
3-32
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Figure 6: Sleep Mode Application without Suspend Function
Switching on the power switch to supply power to USB_VBUS will wake up the module.
Please pay attention to the level match shown in dotted line between the module and the host. Refer to
document [1] for more details about EC21 power management application.
3.4.2. Airplane Mode
When the module enters into airplane 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:
The W_DISABLE# pin is pulled up by default. Driving it to low level will let the module enter into airplane
mode.
Software:
AT+CFUN command provides the choice of the functionality level through setting <fun> into 0, 1 or 4.

AT+CFUN=0: Minimum functionality mode. Both (U)SIM and RF functions are disabled.

AT+CFUN=1: Full functionality mode (by default).

AT+CFUN=4: Airplane mode. RF function is disabled.
1. W_DISABLE# control function is disabled in firmware by default. It can be enabled by
AT+QCFG="airplanecontrol" command. This command is under development.
2. The execution of AT+CFUN command will not affect GNSS function.
NOTES
NOTE