Fridge door sensor, magnetic, arduino, ESP8266
This video shows the fridge door sensor I built. It consists of two magnetic Reed switches in series and adafruit board. The sensor is connected to WiFi, it sends the alert to the phone via Blynk app, when one or both doors stay open for more than 1min. It is very useful for double door fridges that do not come with built-in alert. The detailed project description is given here: https://www.hackster.io/medavid008/fr...