The GSM-based device control is a modern world that contains varieties of electronic equipment and systems likes TV, central heating systems, fire alarm systems, fan, lighting systems, AC, etc., we need to handle, ON/OFF or monitor these electrical devices remotely or to communicate with these but, if you are not at the home or that place and you want to communicate with this device.

In the kit GSM-based device control we have the new technology for handling these devices remotely and for communication to require the GSM, mobile technology, SMS (short message service), and some hardware resources. SMS-based remote control for home appliances is beneficial for the human generation because mobile is the most recently used technology nowadays.

In this GSM-based device control kit, we are going to explain how to control electrical devices through SMS using a GSM modem and AVR microcontroller. We are using a GSM modem with TTL output. You can control 4 devices with this code in this article, which can be extended more with similar drivers. We can show LEDs as the output devices. You can easily connect relays in the place of the LED using a relay driver IC ULN2003.