Soil Moisture Indicator For Gardening Application

The Soil Moisture Indicator system operates by interfacing a soil moisture sensor with an Arduino Nano microcontroller to monitor the water content within a jar filled with soil. The soil moisture sensor is placed directly into the dirt, where it measures the changing electrical conductivity or resistance of the soil, which varies depending on how much water is present. This sensor outputs an analog or digital signal corresponding to the moisture level, which is read by the Arduino Nano. The Nano processes this incoming data to categorize the soil condition into distinct states such as dry, humid, or wet. Once the status is determined, the Arduino communicates with an I2C LCD display to present real-time visual feedback to the user. The I2C protocol simplifies the wiring between the Nano and the LCD display by utilizing only two data lines (SDA and SCL) alongside power and ground connections. The entire circuit is prototyped neatly on a breadboard using jumper wires, and the Arduino Nano is powered and programmed via an Arduino Nano cable connected to a computer or standard USB power source. As the moisture levels in the jar shift, the Arduino continuously updates the LCD screen, providing an intuitive, interactive window into the hydration state of the plant's environment without requiring complex software libraries or advanced configuration.