1. The document describes a smart irrigation system that uses IoT sensors and a mobile app to remotely monitor soil properties and automate irrigation.
2. Key components include a NodeMCU board, DHT11 sensor to measure temperature and humidity, a soil moisture sensor, motor pump, relay module, and LCD display connected via I2C.
3. The system works by sensing soil properties with various sensors, transmitting the data via NodeMCU and WiFi to a mobile app, and controlling the motor pump remotely based on the sensor readings and user inputs to optimize water usage.