Weather Monitoring System Using STM32F103C8T6 with I2C LCD Display

This project implements a compact and cost-effective weather monitoring system using the STM32F103C8T6 microcontroller. It integrates a DHT11 sensor for measuring ambient temperature and humidity, an LDR (Light Dependent Resistor) to estimate light intensity, and a rain sensor to detect rainfall levels. All sensor data is processed in real time and displayed on a 16x2 I2C LCD screen. Light and rain levels are presented as percentages (0–99%) to offer intuitive visual feedback. The system is ideal for educational, agricultural, or environmental applications, demonstrating the practical use of microcontrollers in environmental data acquisition.