By Arch. Attilio Mileto - attilio.mileto@florero.net (Own work) [GFDL or CC BY-SA 3.0], via Wikimedia Commons

​PlantLink Wireless Plant Sensor

Find out when your plants need water. 
Instead of guessing if your plants need watering or not, let PlantLink do it for you. 

It monitors the moisture of the soil, and then sends an alert to you  advising you that it is watering time for your plant via email, text or Push.However, the PlantLink is unable to tell you how much water is required.
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The PlantLink consists of a wireless link device, which is inserted into the soil near the plant, that communicates with a base station. The base station is connected to your router, and then connects the link (or links) to the PlantLink website where all the data is collected.