“One easy way to monitor the moisture in your soil is to build a DIY Soil Moisture Meter using an Arduino Nano. With this project, you can easily see when your plants need watering and adjust your watering schedule accordingly.
Supplies
To build a DIY soil moisture meter using an Arduino Nano, you will need the following materials:
1) Arduino Nano
2) TP-4056 Module
3) Capacitive Soil moisture sensor
4) Lithium Battery
5) MT 3608 Boost converter
6) SSD1306 Display
7) Jumper wires”