Wirelessly monitoring a tree’s water level #IoT @AdafruitIO
spurious_emissions built a wireless water level sensor to monitor their Christmas tree and send alerts “when it gets a little thirsty”.
With the help of two strips of aluminum stuffed in a FoodSaver bag, an Adafruit HUZZAH32 – ESP32 Feather Board, and a little Arduino code, our humble tree has become part of the IoT revolution!
They built their own parallel plate capacitor to sense water droplets, converted from water droplets to bits, and published the water level and battery voltage to Adafruit IO every 10 minutes.
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