SIM800L module, connection, interaction via UART, relay control (LED) via the Arduino 

In this video talk about GSM SIM800L module. Consider methods to connect a PC or a microcontroller Arduino. Learn how you can interact with the module by means of AT commands (calls, sending sms, sms viewing). Write a program to Arduino with the help of which we can control the relays via SMS.
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All elements used in the video can be bought online at Ali express links:
Module SIM800L MicroSIM free shipping + many good reviews
ali.pub/xu0qs
Module SIM800L MicroSIM (if the first link does not work)
ali.pub/9cklz
CONVERTER DC-DC LM2596s. Rin. from 4.5 to 28V, O. from 0.8 to 20 V
ali.pub/beka8
Converter USB to TTL UART chip PL2303
ali.pub/rulhm
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All the programs that I used in this video are available via the link goo.gl/cDgEaY
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If you have any questions, feel free to ask them in the comments to the video!
SUBSCRIBE, PLACED LAIK =) The more views the more I'm going to shoot the video, if the video pick up more than 2,000 views I'll start doing vidos the development of 3D printer that I already almost ready.