This integration allows to have a local execution SMS notification. This is ideal when the internet is offline or when the power goes out.

You will need a USB GSM stick modem.

• Huawei E3372-510( Need to unlock it using this guide)

It requires hassos version 3.6 or higher. Check that the modem is recognized by running:

ls -l /dev/*USB*

In home assistant you need to configure your yaml notification as:

notify:
  - platform: command_line
    name: sms_person1
    command: !secret notify_sms_person1
  - platform: command_line
    name: sms_person2
    command: !secret notify_sms_person2

And the screts yaml:

notify_sms_person1: "/config/custom_components/sms/send_sms.sh +1NNNNNNNNNN /dev/ttyUSB2"
notify_sms_person2: "/config/custom_components/sms/send_sms.sh +1NNNNNNNNNN /dev/ttyUSB2"

Replace the NNN for the actual phone numbers

On Raspberry PI 4, you need a udev rule in the config USB stick, for the Huawei E3372-510 stick for it to be recognized. This config is:

udev\10-gsm-modem.rules

ACTION=="add" \
, ATTRS{idVendor}=="12d1" \
, ATTRS{idProduct}=="14fe" \
, RUN+="/sbin/usb_modeswitch -X -v 12d1 -p 14fe"

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