GitHub Link
Wi-Fi based pump automation by water %
Manually turning water pumps on and off often leads to overflow, dry running, and water wastage. To solve this, I built a Wi-Fi–based smart pump automation system using an ESP8266 NodeMCU, ultrasonic sensor, and SSR-40A relay. The system automatically controls the pump based on the water level percentage in the tank and integrates with Home Assistant for remote monitoring and manual control.
Components Used
- ESP8266 NodeMCU → Wi-Fi microcontroller running ESPHome for automation and communication.
- Ultrasonic Sensor (JSN-SR04T / HC-SR04) → Measures distance to water surface and converts it into tank water percentage.
- SSR-40A Solid-State Relay → Safely switches the water pump ON/OFF based on ESP8266 signals.
- Water Pump → The load being controlled to fill the tank automatically.
- Home Assistant → Smart home platform for real-time monitoring, alerts, and manual pump control via Wi-Fi.
🔹 Working Principle
- Water Level Detection → The ultrasonic sensor measures the distance from the tank top to the water surface.
- Data Processing → ESP8266 running ESPHome converts this distance into a percentage value.
- Pump Control → Based on set thresholds, ESP8266 triggers the SSR-40A relay to switch the water pump ON or OFF.
- Wi-Fi Monitoring → The data is sent over Wi-Fi to Home Assistant for live tracking.
- Manual Override → Users can control the pump manually through the Home Assistant dashboard if required.
🔹 Features
- Automatic Control → Pump turns ON/OFF based on water % levels.
- Prevents Water Wastage → Stops overflow and avoids dry running.
- Real-Time Monitoring → View tank % and pump status in Home Assistant.
- Manual Override → Control the pump remotely from any device.
- Safe Operation → SSR relay ensures reliable and durable switching.
🔹 Benefits
- Saves Water → Eliminates overflow and reduces wastage.
- Energy Efficient → Pump operates only when required.
- Convenient → No more manual switching.
- Smart Control → Monitor and operate via Home Assistant app.
- Scalable → Can be extended with sensors like flow meters, TDS, or pressure sensors.