How to Build a Door Alarm System that Calls You When Opened

Hello in this video we will learn how to use the GSM A6 or SIM800L modules with arduino to make a call when someone or burglars try to sneak into the house. The call is triggered by the reed-switch that when the magnets attached to the door or window is pulled away as the window is opend.
links for codes
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github.com/len...