Automatic greenhouse watering / Automatische Gewächshausbewässerung
prusaprinters
<p>For the vacation season, I thought about how I can ensure that my plants in my greenhouse can be watered when I am not at home.</p><p>The result is an automated irrigation based on Homebridge (interface to Apple's Homekit) a Raspberry Pi and the plant sensor from Xiaomi FlowerCare.</p><p> </p><p><strong>The exemplary process:</strong></p><p>The plant sensor records values for soil moisture, bond fertility, temperature and light intensity. These values are queried in a 5-minute interval from the Homebridge, which runs on a Raspberry Pi.</p><p>As soon as the soil moisture drops below 30%, an automation system that is set up via Apple Homekit switches on a WiFi socket on which a water pump is attached, which transports the water for irrigation into the greenhouse.</p><p> </p><p>The case for the Raspberry Pi and the ultrasonic sensor ist splitted into 2 parts to fit the 3D printers size.</p><p> </p><p>So that the pump doesn't run dry, I connected an ultrasonic sensor to the Raspberry Pi, which checks every 5 minutes whether the water tank still contains enough water.</p><p>If this is not the case, the Raspberry sends a webhook to the Homebridge, which then sends a notification to Apple Homekit.</p><p>The rule for automation also checks in advance whether there is enough water in the tank.</p><p> </p><p>I also printed a cover for the plant sensor so that it is not damaged when the irrigation is running in the greenhouse. So that the values of the light intensity still fit reasonably, I printed the cover very thinly and with transparent filament.</p><p> </p><p><strong>Hardware:</strong></p><ul><li>Xiaomi FlowerCare Sensor</li><li>Waterpump</li><li>10 liter bucket</li><li>Wifi socket</li><li>Raspberry Pi</li><li>Ultrasonic sensor</li><li>PVC Tube 5 meters 16 millimeter diameter</li></ul><p><strong>Software:</strong></p><ul><li>Homebridge Image</li><li>Apple Homekit</li><li>Python script for reading and calculating the water level</li></ul><p><strong>Printed Parts:</strong></p><ul><li>Raspberry Pi Case / Ultrasonic case</li><li>Tube Adapter</li><li>Sprinkler</li></ul>
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