Way cheaper than a guard dog who can use an iPhone, this project will show you how you can use an Adafruit Feather HUZZAH ESP8266 WiFi microcontroller board with a door sensor to email/tweet/text you when your door has opened! #MakeItMinute
Using IFTTT with Adafruit IO to Make an IoT Door Detector Learn Guide
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I built a door detector when I was about 12. When someone opened the door, all windows were minimised. I think that is the killer application for adolescent teens that still live with their parents…
At these days muting the sound is also a good idea.