Create a sleek, light-mode technical presentation about a next-gen $75 Smart Water Monitoring System. 1. Past and Present Baseline: Gen 1 used ESP32/Wi-Fi and failed in 7-10 days due to bio-fouling. Gen 2 used LoRa mesh and WhatsApp alerts but suffered from high maintenance and bi-weekly manual scrubbing. Gaps include labor costs and blackouts. 2. Affordable Hardware (<$75 Node): Built with an ESP32-WROOM-32 microcontroller (deep-sleep under 5mA), SX1276 LoRa module plus SIM800L cellular fallback, powered by a 5V 3W solar panel and 18650 batteries in an IP67 enclosure. 3. Self-Cleaning & Edge Intelligence: A 5V servo motor drives a silicon wiper across lenses for 3 seconds before readings to stop bio-fouling. Edge software runs NSF-WQI calculations and decision trees to flag industrial pollution. 4. Scalability Beyond Jharkhand: Scales to coastal flood zones needing mesh links during cyclone outages, agricultural belts tracking nitrate groundwater runoff, and industrial corridors. 5. Stakeholder Access: Delivers WhatsApp voice notes in local dialects for villagers, SMS alerts for local admins, and React/Grafana GIS dashboards for state departments. add some related professional diagrams also