Patent ID: 8836504

Claim:
A system for determining a state or a state change of a potted plant and for indicating said state or state change to a user by wireless communication, comprising a mobile, self-powered sensor clip or sensor unit mountable on or close to said plant, said sensor clip or sensor unit including a power supply, placed on or within a culture medium in a pot or other vessel at least two cross-linked sensors, each said sensor determining at least one physical and/or chemical parameter, each said parameter being represented as an electrical parameter signal, placed on or within said pot or in one of said sensors an electronic device which transforms each said electrical parameter signal into a digitally encoded parameter signal, a wireless transmitter for transmitting each said digitally encoded parameter signal in realtime to a receiver located outside said pot or other vessel, at least one of said at least two cross-linked sensors determining the contents of nutritive and/or harmful substances within said culture medium.