The Botanicalls project, created by Kate Hartman, Kati London, Rebecca Bray, and Rob Faludi at the ITP program at New York University, lets your plants call you when they need to be watered!
Botanicalls allows thirsty plants to place phone calls for human help. When a plant on the botanicalls network needs a lot or a little water, it can call a human and ask for exactly what it needs.

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Original post by Alex