The soil moisture sensor and how it reads water content in soil, then a smart irrigation build that detects dry soil and alerts via buzzer — applicable to gardening, farming and smart agriculture.

Objectives: Wire and read a soil moisture sensor · Calibrate wet/dry baselines for real soil · Apply sensing to an agricultural use case

Components: Arduino Uno · soil moisture sensor · SSD1306 OLED (128×64) · buzzer

Code: https://github.com/Arun-Roshan/Smart-Irrigation-System.git  — Smart Irrigation repo

Chapters: Intro · Soil moisture sensor · Pinout · Project · Code · Demo