MTX MTX-3G-JAVA series, Руководство пользователя

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MTX ‐ 3G ‐ JAVA Family
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MTX M2M® by MATRIX ELECTRONICA S.L.U
5.3 Ultra Low Power mode
MTX ‐ 3G ‐ JAVA ‐ ULP modems can enter into an Ultra Low Power mode. In this mode, all the board
devices are disconnected from the power supply, except a little portion of digital logic and the RTC
that allows the modem to exit from this mode and go back into the normal mode.
The first time the MTX ‐ 3G ‐ JAVA ‐ ULP modem is powered up, it will switch on normally. When an ULP
modem enters in power down mode, you can wake up again in several ways:

By optoisolated inputs (see Section 4.1.3 ): there are two active ‐ high inputs and two active ‐
low inputs allowing the modem to power up again.

By the RTC alarm (see Section 4.10 ): you can configure the RTC to power on the modem at a
specified date and time
It is possible to know if the modem has been woken up by inputs or the RTC alarm by reading the
status latches with AT commands or the Java application.
WAKEUP input GPIO number
Wake ‐ up 1 GPIO 6
Wake ‐ up 2 GPIO 7
Wake ‐ up 3 GPIO 8
Wake ‐ up 4 GPIO 9
Keep in mind that those inputs and the RTC can only be programmed when MTX ‐ 3G ‐ JAVA ‐ ULP is in
normal mode.
The only way to enter in Ultra Low Power mode is to clean/reset the input latches and execute the
AT^SMSO command.
5.4 Sleep mode
The modems that can disable the Automatic Restart after Shutdown feature are able to enter into a
sleep mode. In this mode all the electronic systems are powered and enabled, but the GSM engine
enters into a power down mode where only the module’s internal RTC stays active (see Section
4.10.1 ).
To enter in Sleep mode, follow these steps:
1. Disable Automatic Restart after Shutdown
2. Use the AT^SMSO command to disconnect the modem from the cellular network and
shutdown the modem
There are several ways to wake up the modem:

Programming a time/date alarm in the module’s internal RTC (AT+CALA command)

Using TURN_ON signal at the power connector

With an acceleration threshold interrupt from the internal accelerometer (see Section 4.8 )