That is pretty easy to send sms and call a phone using SIM800L GSM module. You just need some line of code to do that. And this is the complete tutorial.
View More SIM800L With Arduino TutorialThat is pretty easy to send sms and call a phone using SIM800L GSM module. You just need some line of code to do that. And this is the complete tutorial.
View More SIM800L With Arduino Tutorial