How to receive SMS message in standby mode in nRF9160?

I want to wake up nRF9160 by SMS.

What I want to do:

The nRF9160 usually sleeps to reduce power consumption, and only when it receives SMS it wakes up and send some data by UDP or so.

I succeeded in implementing MQTT(+TLS), but have no experience to implement SMS function.

Any advice?

  • I've already checked the link below, but I don't really get what each line means.

    This is my understanding.

    => Turn on the modem. The modem can receive SMS at any time.

    => Set Pin number, which is a password of SIM.

    => Configure the process of receving SMS.

    After this setting, MCU can go to sleep to wait until SMS is received. When SMS is received, MCU wakes up.

    Is this correct? I'm not familiar with SMS function. Sorry for poor skill.

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