SARA-R4 series - System Integration Manual
UBX-16029218 - R06
System description
Page 15 of 102
Mode
Description
Transition between operating modes
Connected
RF Tx/Rx data connection is in progress.
The module is prepared to accept data signals
from an external device.
When a data connection is initiated, the module enters connected
mode from active mode.
Connected-mode is suspended if Tx/Rx data is not in progress. In such
cases the module automatically switches from connected to active
mode and then, if power saving configuration is enabled by the
AT+CPSMS command, the module automatically switches to low
power deep sleep mode whenever possible. Vice-versa, the module
wakes up from low power deep sleep mode to active mode and then
connected mode if RF Tx/Rx activity is necessary.
When a data connection is terminated, the module returns to the
active-mode.
Table 5: SARA-R4 series modules operating modes description
Figure 2 describes the transition between the different operating modes.
If power saving is enabled,
and Active Timer is expired
•
Upon expiration of the
Periodic Update Timer
•
Using PWR_ON pin
Incoming/outgoing data
or other dedicated device
network communication
No RF Tx/Rx in progress,
Communication dropped
Remove VCC
Switch ON:
•
PWR_ON
Not
powered
Power off
Active
Connected
Deep Sleep
Switch OFF:
•
AT+CPWROFF
•
PWR_ON
Apply VCC
Figure 2: SARA-R4 series modules operating modes transitions
