An IoT-Based Solar Water Level Controller is a smart water management system that automatically monitors and controls the water level in tanks using solar power as the primary energy source. It uses ultrasonic or float sensors to detect the water level, and when the level drops below a set threshold, the system automatically starts a solar-powered water pump. Once the tank is full, the pump is switched off to prevent overflow and wastage.

The IoT integration allows the user to remotely monitor the water level and pump status via a mobile app or web dashboard. It can also send SMS/WhatsApp/email alerts for low or high water levels, ensuring efficient water management even when the user is away.

Parts Used:

1. Solar Panel – generates electricity to power the system
2. Charge Controller – regulates voltage/current and protects battery
3. Battery – stores solar energy for continuous operation
4. Water Level Sensor (Ultrasonic / Float) – measures water level in tank
5. Microcontroller (ESP32 / NodeMCU) – processes sensor data and handles IoT communication
6. Motor Driver / Relay Module – switches the pump ON/OFF
7. Water Pump (DC/AC) – fills the tank from water source
8. IoT Platform (Blynk, MQTT, Thingspeak, etc.) – for remote monitoring and control
9. Wi-Fi Module (built-in on ESP32/NodeMCU) – connects to internet for IoT features
10. Mobile App / Web Dashboard – displays live data and allows control
11. Wiring & Mounting Structure – for installation