TREEMO can detect soil moisture with sensor. You can display tree's emotion by this device.
With the ESP8266 (WIFI dev. kit) you can make your own IoT (internet of things) projects with TREEMO.
How to assembly: https://youtu.be/mORSGAQ57ZU
All 3D model, component and circuit wiring are 100% complete.
But source-code hasn't been completed yet. (in the video is a simple test)
I use small Steel Rounded Head Screws. You can buy at McMaster.
part number 90190A077
ESP8266 Development Board
and some female-to-female jumper wire.
I'm a Gadgets Designer. 3D Printer + Cheap electronics module = amazing gadgets !!!