It is very easy to build an “SMS-controlled relay” with the help of a cheap GSM modem module and a small microcontroller board. Here, I’m using the SIM800L and Arduino Nano V3 to develop a nifty ...
The project illustrates how the SMS message is used to control 8 devices through relays with only few components required. An old Ericsson mobile phone is used to connect to AT90S2313 and has a ...
Over the years, control relays of various types have been used by the hundreds — even thousands — to control nearly every function in commercial and industrial processes. Today, many of those ...
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