Low Cost 4 channel Wifi switch (IOT Application)

Hello everyone, this is my first intractable and I am going to share my project of low cost 4 channel WiFi switch. My requirements: It should incur low cost as far as hardware is concerned. The device should be reliable as I would be using it to control lights at my home while I am on a vacation. I should get an update on my mobile device once the switch changes state.”

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