Does your espresso machine have a water reservoir that's inconvenient to check on? I do! Let's build a contactless remote water level meter that harnesses the power of "The INTERNET" to keep us informed without having to move all the cups, lift the lid, and peer into it like some kind of luddite! That's right, we'll set up an Adafruit IO feed and dashboard to spy on the water tank.
This can be done with an ESP32-S2 Feather and deep sleep mode to keep it low-power -- a 2200mAh battery should last over four months on a single charge.
Plus, it's ultrasonic, so you know your water is being secretly screamed at by a robot.
You'll have a beautiful dashboard to keep track of it all:
Note: the 3D printed tank lid in this guide fits the ECM Synchronika and Profitec Go but you should be able to modify the file to fit other brands/makes.
Page last edited February 16, 2025
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