Feel free to use the ready-made gerber files from my github to order a complete assebled PCB from your favorite site

Here are the files: https://github.com/ovidiu4/smart-plant-monitor/tree/main/hardware

Feel free to use the ready-made gerber files from my github to order a bunch of soil probe PCBs 

https://github.com/ovidiu4/smart-plant-monitor/tree/main/hardware

If you'd like to skip this step just know that capacitance can be measures with just a single wire! 

Experiment with some dupont wires :)

Feel free to use the ready-made STL files from my github to order or 3D your case

https://github.com/ovidiu4/smart-plant-monitor/tree/main/case

For this step you only need a tiny 5V solar pane (25mA should be enough) and a USB-C male connector.

With some basic soldering you could make something like this:

If you opted to build a complete project like i did, now is the time to asseble everything together.

The case has specific slots for the battery, display and the PCB to fit in so keep that in mind in case you decided to use different components