Arduino GSM Tutorial for beginners (Sending SMS with SIM800)

This tutorial is about sending a SMS using a SIM800 GSM module with an Arduino. SIM800 module comes with different versions like SIM800L & SIM800C. You can use any of these and everything has explained in details in here. I hope to create more tutorials related to this and hope them in future.
Please comment all your doubts and unclear points in comment section and I will answer them personally.
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Arduino Code : drive.google.c...
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