DRAINAGE MONITORING USING NODEMCU EPS32 AND JSN SR04T VIA TELEGRAM NOTIFICATION
The system uses stainless steel drain traps with wire mesh and JSN-SR04T ultrasonic sensors to detect trash levels. When trash reaches the 20–22 cm threshold, the NodeMCU ESP32 activates a buzzer and sends Telegram alerts. Data is also displayed on Node-RED for remote monitoring. The system provides an effective low-cost solution for early drain maintenance and flood prevention.