A simple SMS gateway based off @erayedin Github Gist Code
You can find the tutorial used on Medium
This allows you to send SMS from your phone using Airmore utility and the OpenPyxl. You can find the docs for both here as well
https://openpyxl.readthedocs.io/en/stable/usage.html#read-an-existing-workbook
https://pyairmore.readthedocs.io/en/master/
Of course based on your need you can customize the script to run for some specific conditions as well.
Run the following commands
Install the pyAirmore
pip install pyairmore
Install openpyxl
pip install openpyxl
Run the file
python main.py