TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28
System description
Page 49 of 164
This behavior allows the DTE to stay in power saving mode until the DCE related event requests
service. For SMS arrival, if several events coincidently occur or in quick succession each event
independently triggers the RI line, although the line will not be deactivated between each event. As a
result, the RI line may stay to ON for more than 1 s, if an incoming call is answered within less than 1 s
(with ATA or if auto-answering is set to ATS0=1) than the RI line is set to OFF earlier, so that:
☞
RI line monitoring cannot be used by the DTE to determine the number of received SMSes.
☞
For multiple events (incoming call plus SMS received), the RI line cannot be used to discriminate
the two events, but the DTE must rely on subsequent URCs and interrogate the DCE with the
proper commands.
The RI line can additionally notify all the URCs and/or all the incoming data in PPP and Direct Link
connections, if the feature is enabled by the AT+URING command (for more details see the u-blox AT
Commands Manual
): the RI line is asserted when one of the configured events occur and it remains
asserted for 1 s unless another configured event will happen, with the same behavior described in
☞
The AT+URING command for the notification of all the URCs and/or incoming data in PPP and
Direct Link connections over RI line is not supported by “00”, “01”, “60”, TOBY-L201-02S product
versions.
1.9.2.4
UART and power-saving
The power saving configuration is controlled by the AT+UPSV command (for the complete
description, see the u-blox AT Commands Manual
). When power saving is enabled, the module
automatically enters low power idle-mode whenever possible, and otherwise the active-mode is
maintained by the module (see section
for definition and description of module operating modes
referred to in this section).
The AT+UPSV command configures both the module power saving and also the UART behavior in
relation to the power saving. The conditions for the module entering low power idle-mode also depend
on the UART power saving configuration, as the module does not enter the low power idle-mode
according to any required activity related to the network (within or outside an active call) or any other
required concurrent activity related to the functions and interfaces of the module, including the UART
interface.
The AT+UPSV command can set these different power saving configurations:
AT+UPSV=0, power saving disabled (default configuration)
AT+UPSV=1, power saving enabled cyclically
AT+UPSV=2, power saving enabled and controlled by the UART RTS input line
AT+UPSV=3, power saving enabled and controlled by the UART DTR input line
The different power saving configurations that can be set by the +UPSV AT command are described
in details in the following subsections.
summarizes the UART interface communication
process in the different power saving configurations, in relation with the hardware flow control
settings and the RTS input line status. For more details on the +UPSV AT command description, see
u-blox AT commands Manual
